Jibri-xorg service failed to start

Searched all the forum, and freshly installed jibri on a server different from jitsi-meet.
But still can’t start jibri-xorg service. Please help advice.

$ sudo service lightdm status
● lightdm.service - Light Display Manager
Loaded: loaded (/lib/systemd/system/lightdm.service; static; vendor preset: enabled)
Active: inactive (dead)
Docs: man:lightdm(1)

$ ps aux |grep Xorg
lyingjie 2177 0.0 0.0 15960 964 pts/0 S+ 10:57 0:00 grep --color=auto Xorg

$ sudo service jibri-xorg restart

$ sudo service jibri-xorg status
● jibri-xorg.service - Jibri Xorg Process
Loaded: loaded (/etc/systemd/system/jibri-xorg.service; disabled; vendor preset: enabled)
Active: failed (Result: start-limit-hit) since 三 2019-05-29 10:57:36 CST; 4s ago
Process: 2221 ExecStart=/usr/bin/Xorg -nocursor -noreset +extension RANDR +extension RENDER -logfile /tmp/xorg.log -config /etc/jitsi/jibri/xorg-video-dumm
Main PID: 2221 (code=exited, status=1/FAILURE)

5月 29 10:57:36 push-host systemd[1]: jibri-xorg.service: Service hold-off time over, scheduling restart.
5月 29 10:57:36 push-host systemd[1]: Stopped Jibri Xorg Process.
5月 29 10:57:36 push-host systemd[1]: jibri-xorg.service: Start request repeated too quickly.
5月 29 10:57:36 push-host systemd[1]: Failed to start Jibri Xorg Process.
5月 29 10:57:36 push-host systemd[1]: jibri-xorg.service: Unit entered failed state.
5月 29 10:57:36 push-host systemd[1]: jibri-xorg.service: Failed with result ‘start-limit-hit’.

What does the Xorg logfile say? /tmp/xorg.log

There is no such file: /tmp/xorg.log

Hum. Look at the systemd unit file and try to launch the command by hand to see what the error is.

$ /usr/bin/Xorg -nocursor -noreset +extension RANDR +extension RENDER -logfile /tmp/xorg.log -config /etc/jitsi/jibri/xorg-video-dummy.conf
/usr/lib/xorg/Xorg.wrap: Only console users are allowed to run the X server

what does this mean?

Does your system have a graphical user interface installed?

I think so, I can use VNC to connect to the desktop.

After google and change some settings, now it run with belwo error.

$ /usr/bin/Xorg -nocursor -noreset +extension RANDR +extension RENDER -logfile /tmp/xorg.log -config /etc/jitsi/jibri/xorg-video-dummy.conf :0
(EE)
Fatal server error:
(EE) The ‘-logfile’ option cannot be used with elevated privileges.
(EE)
(EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
(EE)

Do you already have an X server running on Display :0 then?

There is no Xorg process before trying to run the command.

$ ps aux |grep -i xorg
lyingjie 4975 0.0 0.0 15960 964 pts/0 S+ 13:24 0:00 grep --color=auto -i xorg

While trying to run xorg command, it gives below error:
$ sudo Xorg -nocursor -noreset +extension RANDR +extension RENDER -config /etc/jitsi/jibri/xorg-video-dummy.conf

$ cat /var/log/Xorg.0.log
[ 1996.773]
X.Org X Server 1.18.4
Release Date: 2016-07-19
[ 1996.804] X Protocol Version 11, Revision 0
[ 1996.814] Build Operating System: Linux 4.4.0-128-generic x86_64 Ubuntu
[ 1996.825] Current Operating System: Linux push-host 4.15.0-50-generic #54~16.04.1-Ubuntu SMP Wed May 8 15:55:19 UTC 2019 x86_64
[ 1996.825] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-50-generic root=UUID=8b4d6ade-2982-4be1-b9e2-48ab4b318c08 ro quiet splash nomodeset vt.handoff=7
[ 1996.857] Build Date: 10 August 2018 09:33:05AM
[ 1996.868] xorg-server 2:1.18.4-0ubuntu0.8 (For technical support please see http://www.ubuntu.com/support)
[ 1996.879] Current version of pixman: 0.33.6
[ 1996.900] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 1996.900] Markers: (–) probed, () from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 1996.942] (==) Log file: “/var/log/Xorg.0.log”, Time: Fri May 31 13:25:23 2019
[ 1996.952] (++) Using config file: “/etc/jitsi/jibri/xorg-video-dummy.conf”
[ 1996.963] (==) Using system config directory “/usr/share/X11/xorg.conf.d”
[ 1996.963] (==) ServerLayout “dummy_layout”
[ 1996.963] (
) |–>Screen “dummy_screen” (0)
[ 1996.963] () | |–>Monitor “dummy_monitor”
[ 1996.963] (
) | |–>Device “dummy_videocard”
[ 1996.963] () |–>Input Device “dummy_mouse”
[ 1996.963] (
) |–>Input Device “dummy_keyboard”
[ 1996.963] () Option “DontVTSwitch” “true”
[ 1996.963] (
) Option “AllowMouseOpenFail” “true”
[ 1996.963] () Option “AutoAddDevices” “false”
[ 1996.963] (
) Option “AutoEnableDevices” “false”
[ 1996.963] () Not automatically adding devices
[ 1996.963] (
) Not automatically enabling devices
[ 1996.964] (==) Automatically adding GPU devices
[ 1996.964] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 1996.964] (WW) The directory “/usr/share/fonts/X11/cyrillic” does not exist.
[ 1996.964] Entry deleted from font path.
[ 1996.964] (WW) The directory “/usr/share/fonts/X11/100dpi/” does not exist.
[ 1996.964] Entry deleted from font path.
[ 1996.964] (WW) The directory “/usr/share/fonts/X11/75dpi/” does not exist.
[ 1996.964] Entry deleted from font path.
[ 1996.964] (WW) The directory “/usr/share/fonts/X11/100dpi” does not exist.
[ 1996.964] Entry deleted from font path.
[ 1996.964] (WW) The directory “/usr/share/fonts/X11/75dpi” does not exist.
[ 1996.964] Entry deleted from font path.
[ 1996.964] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
built-ins
[ 1996.964] (==) ModulePath set to “/usr/lib/x86_64-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules”
[ 1996.964] (II) Loader magic: 0x55b63cd84dc0
[ 1996.964] (II) Module ABI versions:
[ 1996.964] X.Org ANSI C Emulation: 0.4
[ 1996.964] X.Org Video Driver: 20.0
[ 1996.964] X.Org XInput driver : 22.1
[ 1996.964] X.Org Server Extension : 9.0
[ 1996.964] (–) using VT number 2

[ 1996.964] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[ 1996.966] (–) PCI:*(0:0:2:0) 8086:2e12:103c:3646 rev 3, Mem @ 0xf0000000/4194304, 0xe0000000/268435456, I/O @ 0x00001230/8, BIOS @ 0x???/131072
[ 1996.966] (–) PCI: (0:0:2:1) 8086:2e13:103c:3646 rev 3, Mem @ 0xf0400000/1048576
[ 1996.966] (II) LoadModule: “glx”
[ 1996.966] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 1996.967] (II) Module glx: vendor=“X.Org Foundation”
[ 1996.967] compiled for 1.18.4, module version = 1.0.0
[ 1996.967] ABI class: X.Org Server Extension, version 9.0
[ 1996.967] (==) AIGLX enabled
[ 1996.967] (II) LoadModule: “dummy”
[ 1996.967] (II) Loading /usr/lib/xorg/modules/drivers/dummy_drv.so
[ 1996.967] (II) Module dummy: vendor=“X.Org Foundation”
[ 1996.967] compiled for 1.18.1, module version = 0.3.7
[ 1996.967] Module class: X.Org Video Driver
[ 1996.967] ABI class: X.Org Video Driver, version 20.0
[ 1996.967] (II) LoadModule: “void”
[ 1996.967] (II) Loading /usr/lib/xorg/modules/input/void_drv.so
[ 1996.967] (II) Module void: vendor=“X.Org Foundation”
[ 1996.967] compiled for 1.18.1, module version = 1.4.1
[ 1996.967] Module class: X.Org XInput Driver
[ 1996.967] ABI class: X.Org XInput driver, version 22.1
[ 1996.967] (II) DUMMY: Driver for Dummy chipsets: dummy
[ 1996.967] (WW) Falling back to old probe method for dummy
[ 1996.967] (II) DUMMY(0): Chipset is a DUMMY
[ 1996.967] () DUMMY(0): Depth 24, (–) framebuffer bpp 32
[ 1996.967] (==) DUMMY(0): RGB weight 888
[ 1996.967] (==) DUMMY(0): Default visual is TrueColor
[ 1996.967] (==) DUMMY(0): Using gamma correction (1.0, 1.0, 1.0)
[ 1996.967] (
) DUMMY(0): VideoRAM: 192000 kByte
[ 1996.967] (–) DUMMY(0): Max Clock: 230000 kHz
[ 1996.967] (II) DUMMY(0): dummy_monitor: Using hsync range of 5.00-1000.00 kHz
[ 1996.967] (II) DUMMY(0): dummy_monitor: Using vrefresh range of 5.00-200.00 Hz
[ 1996.968] (II) DUMMY(0): Clock range: 11.00 to 300.00 MHz
[ 1996.968] (II) DUMMY(0): Not using mode “32768x32768” (insufficient memory for mode)
[ 1996.968] (II) DUMMY(0): Not using mode “32768x16384” (insufficient memory for mode)
[ 1996.968] (II) DUMMY(0): Not using mode “16384x8192” (insufficient memory for mode)
[ 1996.968] (II) DUMMY(0): Not using mode “8192x4096” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “5496x1200” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “5280x1080” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “5280x1200” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “5120x3200” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “4800x1200” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “3840x2880” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “3840x2560” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “3840x2048” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “3840x1080” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “3600x1200” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “3288x1080” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “2048x2048” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “2048x1536” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “2560x1600” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “2560x1440” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1920x1440” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1920x1200” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1920x1080” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1680x1050” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1600x1200” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1600x900” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1440x900” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1366x768” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1280x1024” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1280x800” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1280x768” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1360x768” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1024x768” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “768x1024” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “800x1280” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1280x800” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “720x1280” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “768x1024” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1024x768” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “600x1024” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “536x960” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “600x800” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “480x854” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “480x800” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “800x1242” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1280x762” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “720x1242” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “768x986” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “1024x730” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “600x986” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “536x922” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “600x762” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “480x810” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “480x762” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1024x768i” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1152x864” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1280x960” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1280x960” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1792x1344” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1792x1344” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1856x1392” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1856x1392” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1152x864” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1152x864” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1152x864” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1152x864” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1152x864” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1152x864” (height too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1400x1050” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1400x1050” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1400x1050” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1400x1050” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using default mode “1600x1024” (width too large for virtual size)
[ 1996.968] (II) DUMMY(0): Not using mode “5120x3200” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “3840x2880” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “3840x2560” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “3840x2048” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “2048x2048” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “2560x1600” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1920x1440” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1920x1200” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1920x1080” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1600x1200” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1680x1050” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1600x900” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1400x1050” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1440x900” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1280x1024” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1366x768” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1280x800” (no mode of this name)
[ 1996.968] (II) DUMMY(0): Not using mode “1024x768” (no mode of this name)
[ 1996.969] () DUMMY(0): Virtual size is 1280x720 (pitch 1280)
[ 1996.969] (
) DUMMY(0): *Mode “1024x600”: 18.3 MHz, 15.9 kHz, 25.1 Hz
[ 1996.969] (II) DUMMY(0): Modeline "1024x600"x25.1 18.26 1024 1056 1120 1152 600 614 617 631 (15.9 kHz z)
[ 1996.969] () DUMMY(0): *Mode “800x600”: 14.5 MHz, 15.9 kHz, 25.2 Hz
[ 1996.969] (II) DUMMY(0): Modeline "800x600"x25.2 14.50 800 832 880 912 600 614 617 631 (15.9 kHz z)
[ 1996.969] (
) DUMMY(0): *Default mode “320x200”: 15.8 MHz, 37.9 kHz, 85.3 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "320x200"x85.3 15.75 320 336 368 416 200 200 202 222 doublescan -hsync +vsync (37.9 kHz zd)
[ 1996.969] () DUMMY(0): Mode “1280x720”: 27.4 MHz, 18.9 kHz, 25.0 Hz
[ 1996.969] (II) DUMMY(0): Modeline "1280x720"x25.0 27.41 1280 1312 1416 1448 720 737 740 757 (18.9 kHz)
[ 1996.969] (
) DUMMY(0): Mode “1280x682”: 25.9 MHz, 18.0 kHz, 25.0 Hz
[ 1996.969] (II) DUMMY(0): Modeline "1280x682"x25.0 25.85 1280 1312 1408 1440 682 698 701 717 (18.0 kHz)
[ 1996.969] () DUMMY(0): Default mode “960x720”: 170.7 MHz, 128.5 kHz, 85.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "960x720"x85.0 170.68 960 1036 1144 1328 720 720 722 756 doublescan -hsync +vsync (128.5 kHz d)
[ 1996.969] (
) DUMMY(0): Default mode “960x720”: 148.5 MHz, 112.5 kHz, 75.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "960x720"x75.0 148.50 960 1032 1144 1320 720 720 722 750 doublescan -hsync +vsync (112.5 kHz d)
[ 1996.969] () DUMMY(0): Default mode “960x720”: 117.0 MHz, 90.0 kHz, 60.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "960x720"x60.0 117.00 960 1024 1128 1300 720 720 722 750 doublescan -hsync +vsync (90.0 kHz d)
[ 1996.969] (
) DUMMY(0): Default mode “928x696”: 144.0 MHz, 112.5 kHz, 75.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "928x696"x75.0 144.00 928 992 1104 1280 696 696 698 750 doublescan -hsync +vsync (112.5 kHz d)
[ 1996.969] () DUMMY(0): Default mode “928x696”: 109.2 MHz, 86.4 kHz, 60.1 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "928x696"x60.1 109.15 928 976 1088 1264 696 696 698 719 doublescan -hsync +vsync (86.4 kHz d)
[ 1996.969] (
) DUMMY(0): Default mode “896x672”: 130.5 MHz, 106.3 kHz, 75.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "896x672"x75.0 130.50 896 944 1052 1228 672 672 674 708 doublescan -hsync +vsync (106.3 kHz d)
[ 1996.969] () DUMMY(0): Default mode “896x672”: 102.4 MHz, 83.7 kHz, 60.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "896x672"x60.0 102.40 896 960 1060 1224 672 672 674 697 doublescan -hsync +vsync (83.7 kHz d)
[ 1996.969] (
) DUMMY(0): Mode “1024x562”: 17.0 MHz, 14.8 kHz, 25.0 Hz
[ 1996.969] (II) DUMMY(0): Modeline "1024x562"x25.0 17.03 1024 1056 1120 1152 562 575 578 591 (14.8 kHz)
[ 1996.969] () DUMMY(0): Default mode “832x624”: 57.3 MHz, 49.7 kHz, 74.6 Hz
[ 1996.969] (II) DUMMY(0): Modeline "832x624"x74.6 57.28 832 864 928 1152 624 625 628 667 -hsync -vsync (49.7 kHz d)
[ 1996.969] (
) DUMMY(0): Mode “960x536”: 15.2 MHz, 14.1 kHz, 25.0 Hz
[ 1996.969] (II) DUMMY(0): Modeline "960x536"x25.0 15.23 960 992 1048 1080 536 548 551 563 (14.1 kHz)
[ 1996.969] () DUMMY(0): Mode “960x498”: 14.1 MHz, 13.1 kHz, 25.1 Hz
[ 1996.969] (II) DUMMY(0): Modeline "960x498"x25.1 14.09 960 992 1040 1072 498 509 511 523 (13.1 kHz)
[ 1996.969] (
) DUMMY(0): Mode “800x562”: 13.5 MHz, 14.8 kHz, 25.1 Hz
[ 1996.969] (II) DUMMY(0): Modeline "800x562"x25.1 13.52 800 832 880 912 562 575 578 591 (14.8 kHz)
[ 1996.969] () DUMMY(0): Default mode “840x525”: 107.4 MHz, 93.9 kHz, 85.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "840x525"x85.0 107.38 840 904 992 1144 525 526 529 552 doublescan -hsync +vsync (93.9 kHz d)
[ 1996.969] (
) DUMMY(0): Default mode “840x525”: 93.5 MHz, 82.3 kHz, 75.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "840x525"x75.0 93.50 840 900 988 1136 525 526 529 549 doublescan -hsync +vsync (82.3 kHz d)
[ 1996.969] () DUMMY(0): Default mode “840x525”: 87.0 MHz, 76.6 kHz, 69.9 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "840x525"x69.9 87.00 840 900 988 1136 525 526 529 548 doublescan -hsync +vsync (76.6 kHz d)
[ 1996.969] (
) DUMMY(0): Default mode “840x525”: 73.1 MHz, 65.3 kHz, 60.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "840x525"x60.0 73.12 840 892 980 1120 525 526 529 544 doublescan -hsync +vsync (65.3 kHz d)
[ 1996.969] () DUMMY(0): Mode “848x480”: 12.1 MHz, 12.7 kHz, 25.1 Hz
[ 1996.969] (II) DUMMY(0): Modeline "848x480"x25.1 12.09 848 880 920 952 480 491 493 505 (12.7 kHz)
[ 1996.969] (
) DUMMY(0): Mode “800x480”: 11.5 MHz, 12.7 kHz, 25.1 Hz
[ 1996.969] (II) DUMMY(0): Modeline "800x480"x25.1 11.46 800 832 872 904 480 491 493 505 (12.7 kHz)
[ 1996.969] () DUMMY(0): Mode “848x442”: 11.1 MHz, 11.6 kHz, 25.1 Hz
[ 1996.969] (II) DUMMY(0): Modeline "848x442"x25.1 11.09 848 880 920 952 442 452 454 465 (11.6 kHz)
[ 1996.969] (
) DUMMY(0): Default mode “700x525”: 89.6 MHz, 93.8 kHz, 85.1 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "700x525"x85.1 89.63 700 752 828 956 525 525 527 551 doublescan -hsync +vsync (93.8 kHz d)
[ 1996.969] () DUMMY(0): Default mode “700x525”: 77.9 MHz, 81.5 kHz, 74.8 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "700x525"x74.8 77.90 700 732 892 956 525 526 532 545 doublescan +hsync +vsync (81.5 kHz d)
[ 1996.969] (
) DUMMY(0): Default mode “700x525”: 72.5 MHz, 76.5 kHz, 70.1 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "700x525"x70.1 72.53 700 748 824 948 525 525 527 546 doublescan -hsync +vsync (76.5 kHz d)
[ 1996.969] () DUMMY(0): Default mode “700x525”: 61.0 MHz, 64.9 kHz, 60.0 Hz (D)
[ 1996.969] (II) DUMMY(0): Modeline "700x525"x60.0 61.00 700 744 820 940 525 526 532 541 doublescan +hsync +vsync (64.9 kHz d)
[ 1996.969] (
) DUMMY(0): Default mode “640x512”: 78.8 MHz, 91.1 kHz, 85.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "640x512"x85.0 78.75 640 672 752 864 512 512 514 536 doublescan +hsync +vsync (91.1 kHz d)
[ 1996.970] () DUMMY(0): Default mode “640x512”: 67.5 MHz, 80.0 kHz, 75.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "640x512"x75.0 67.50 640 648 720 844 512 512 514 533 doublescan +hsync +vsync (80.0 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “640x512”: 54.0 MHz, 64.0 kHz, 60.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "640x512"x60.0 54.00 640 664 720 844 512 512 514 533 doublescan +hsync +vsync (64.0 kHz d)
[ 1996.970] () DUMMY(0): Default mode “720x450”: 53.2 MHz, 55.9 kHz, 59.9 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "720x450"x59.9 53.25 720 760 836 952 450 451 454 467 doublescan -hsync +vsync (55.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “640x480”: 74.2 MHz, 85.9 kHz, 85.1 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "640x480"x85.1 74.25 640 672 752 864 480 480 482 505 doublescan +hsync +vsync (85.9 kHz d)
[ 1996.970] () DUMMY(0): Default mode “640x480”: 36.0 MHz, 43.3 kHz, 85.0 Hz
[ 1996.970] (II) DUMMY(0): Modeline "640x480"x85.0 36.00 640 696 752 832 480 481 484 509 -hsync -vsync (43.3 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “640x480”: 31.5 MHz, 37.5 kHz, 75.0 Hz
[ 1996.970] (II) DUMMY(0): Modeline "640x480"x75.0 31.50 640 656 720 840 480 481 484 500 -hsync -vsync (37.5 kHz d)
[ 1996.970] () DUMMY(0): Default mode “640x480”: 31.5 MHz, 37.9 kHz, 72.8 Hz
[ 1996.970] (II) DUMMY(0): Modeline "640x480"x72.8 31.50 640 664 704 832 480 489 492 520 -hsync -vsync (37.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “640x480”: 54.0 MHz, 60.0 kHz, 60.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "640x480"x60.0 54.00 640 688 744 900 480 480 482 500 doublescan +hsync +vsync (60.0 kHz d)
[ 1996.970] () DUMMY(0): Default mode “640x480”: 25.2 MHz, 31.5 kHz, 59.9 Hz
[ 1996.970] (II) DUMMY(0): Modeline "640x480"x59.9 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “720x400”: 35.5 MHz, 37.9 kHz, 85.0 Hz
[ 1996.970] (II) DUMMY(0): Modeline "720x400"x85.0 35.50 720 756 828 936 400 401 404 446 -hsync +vsync (37.9 kHz d)
[ 1996.970] () DUMMY(0): Default mode “680x384”: 36.0 MHz, 47.4 kHz, 60.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "680x384"x60.0 36.00 680 704 720 760 384 385 390 395 doublescan +hsync -vsync (47.4 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “680x384”: 42.4 MHz, 47.7 kHz, 59.8 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "680x384"x59.8 42.38 680 716 784 888 384 385 390 399 doublescan -hsync +vsync (47.7 kHz d)
[ 1996.970] () DUMMY(0): Default mode “640x400”: 31.5 MHz, 37.9 kHz, 85.1 Hz
[ 1996.970] (II) DUMMY(0): Modeline "640x400"x85.1 31.50 640 672 736 832 400 401 404 445 -hsync +vsync (37.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “576x432”: 71.7 MHz, 91.5 kHz, 100.1 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "576x432"x100.1 71.73 576 616 680 784 432 432 434 457 doublescan -hsync +vsync (91.5 kHz d)
[ 1996.970] () DUMMY(0): Default mode “576x432”: 60.8 MHz, 77.5 kHz, 85.2 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "576x432"x85.2 60.75 576 608 672 784 432 432 434 455 doublescan +hsync -vsync (77.5 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “576x432”: 59.8 MHz, 77.1 kHz, 85.1 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "576x432"x85.1 59.83 576 612 676 776 432 432 434 453 doublescan -hsync +vsync (77.1 kHz d)
[ 1996.970] () DUMMY(0): Default mode “576x432”: 54.0 MHz, 67.5 kHz, 75.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "576x432"x75.0 54.00 576 608 672 800 432 432 434 450 doublescan +hsync +vsync (67.5 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “576x432”: 52.5 MHz, 67.6 kHz, 75.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "576x432"x75.0 52.49 576 612 676 776 432 432 434 451 doublescan -hsync +vsync (67.6 kHz d)
[ 1996.970] () DUMMY(0): Default mode “576x432”: 48.4 MHz, 63.0 kHz, 70.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "576x432"x70.0 48.38 576 612 672 768 432 432 434 450 doublescan -hsync +vsync (63.0 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “576x432”: 40.8 MHz, 53.7 kHz, 60.1 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "576x432"x60.1 40.81 576 608 668 760 432 432 434 447 doublescan -hsync +vsync (53.7 kHz d)
[ 1996.970] () DUMMY(0): Default mode “640x350”: 31.5 MHz, 37.9 kHz, 85.1 Hz
[ 1996.970] (II) DUMMY(0): Modeline "640x350"x85.1 31.50 640 672 736 832 350 382 385 445 +hsync -vsync (37.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “512x384i”: 22.4 MHz, 35.5 kHz, 86.6 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "512x384i"x86.6 22.45 512 516 604 632 384 384 388 409 interlace doublescan +hsync +vsync (35.5 kHz d)
[ 1996.970] () DUMMY(0): Default mode “512x384”: 47.2 MHz, 68.7 kHz, 85.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "512x384"x85.0 47.25 512 536 584 688 384 384 386 404 doublescan +hsync +vsync (68.7 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “512x384”: 39.4 MHz, 60.0 kHz, 75.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "512x384"x75.0 39.38 512 520 568 656 384 384 386 400 doublescan +hsync +vsync (60.0 kHz d)
[ 1996.970] () DUMMY(0): Default mode “512x384”: 37.5 MHz, 56.5 kHz, 70.1 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "512x384"x70.1 37.50 512 524 592 664 384 385 388 403 doublescan -hsync -vsync (56.5 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “512x384”: 32.5 MHz, 48.4 kHz, 60.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "512x384"x60.0 32.50 512 524 592 672 384 385 388 403 doublescan -hsync -vsync (48.4 kHz d)
[ 1996.970] () DUMMY(0): Default mode “416x312”: 28.6 MHz, 49.7 kHz, 74.7 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "416x312"x74.7 28.64 416 432 464 576 312 312 314 333 doublescan -hsync -vsync (49.7 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “400x300”: 28.1 MHz, 53.7 kHz, 85.3 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "400x300"x85.3 28.15 400 416 448 524 300 300 302 315 doublescan +hsync +vsync (53.7 kHz d)
[ 1996.970] () DUMMY(0): Default mode “400x300”: 24.8 MHz, 46.9 kHz, 75.1 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "400x300"x75.1 24.75 400 408 448 528 300 300 302 312 doublescan +hsync +vsync (46.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “400x300”: 25.0 MHz, 48.1 kHz, 72.2 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "400x300"x72.2 25.00 400 428 488 520 300 318 321 333 doublescan +hsync +vsync (48.1 kHz d)
[ 1996.970] () DUMMY(0): Default mode “400x300”: 20.0 MHz, 37.9 kHz, 60.3 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "400x300"x60.3 20.00 400 420 484 528 300 300 302 314 doublescan +hsync +vsync (37.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “400x300”: 18.0 MHz, 35.2 kHz, 56.3 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "400x300"x56.3 18.00 400 412 448 512 300 300 301 312 doublescan +hsync +vsync (35.2 kHz d)
[ 1996.970] () DUMMY(0): Default mode “320x240”: 18.0 MHz, 43.3 kHz, 85.2 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "320x240"x85.2 18.00 320 348 376 416 240 240 242 254 doublescan -hsync -vsync (43.3 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “320x240”: 15.8 MHz, 37.5 kHz, 75.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "320x240"x75.0 15.75 320 328 360 420 240 240 242 250 doublescan -hsync -vsync (37.5 kHz d)
[ 1996.970] () DUMMY(0): Default mode “320x240”: 15.8 MHz, 37.9 kHz, 72.8 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "320x240"x72.8 15.75 320 332 352 416 240 244 246 260 doublescan -hsync -vsync (37.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “320x240”: 12.6 MHz, 31.5 kHz, 60.1 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "320x240"x60.1 12.59 320 328 376 400 240 245 246 262 doublescan -hsync -vsync (31.5 kHz d)
[ 1996.970] () DUMMY(0): Default mode “360x200”: 17.8 MHz, 37.9 kHz, 85.0 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "360x200"x85.0 17.75 360 378 414 468 200 200 202 223 doublescan -hsync +vsync (37.9 kHz d)
[ 1996.970] (
) DUMMY(0): Default mode “320x175”: 15.8 MHz, 37.9 kHz, 85.3 Hz (D)
[ 1996.970] (II) DUMMY(0): Modeline "320x175"x85.3 15.75 320 336 368 416 175 191 192 222 doublescan +hsync -vsync (37.9 kHz d)
[ 1996.970] (==) DUMMY(0): DPI set to (96, 96)
[ 1996.970] (II) Loading sub module “fb”
[ 1996.970] (II) LoadModule: “fb”
[ 1996.971] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 1996.971] (II) Module fb: vendor=“X.Org Foundation”
[ 1996.971] compiled for 1.18.4, module version = 1.0.0
[ 1996.971] ABI class: X.Org ANSI C Emulation, version 0.4
[ 1996.971] (II) Loading sub module “ramdac”
[ 1996.971] (II) LoadModule: “ramdac”
[ 1996.971] (II) Module “ramdac” already built-in
[ 1996.971] (–) Depth 24 pixmap format is 32 bpp
[ 1996.971] (II) DUMMY(0): Using 37680 scanlines of offscreen memory
[ 1996.971] (==) DUMMY(0): Backing store enabled
[ 1996.971] (==) DUMMY(0): Silken mouse enabled
[ 1996.971] (WW) DUMMY(0): Option “ConstantDPI” is not used
[ 1996.971] (==) RandR enabled
[ 1996.974] (II) SELinux: Disabled on system
[ 1996.975] (II) AIGLX: Screen 0 is not DRI2 capable
[ 1996.975] (EE) AIGLX: reverting to software rendering
[ 1997.010] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[ 1997.011] (II) AIGLX: Loaded and initialized swrast
[ 1997.011] (II) GLX: Initialized DRISWRAST GL provider for screen 0
[ 1997.041] (II) Using input driver ‘void’ for ‘dummy_mouse’
[ 1997.041] () Option “CorePointer” “true”
[ 1997.041] (
) dummy_mouse: always reports core events
[ 1997.041] (II) XINPUT: Adding extended input device “dummy_mouse” (type: Void, id 6)
[ 1997.041] () dummy_mouse: (accel) keeping acceleration scheme 1
[ 1997.041] (
) dummy_mouse: (accel) acceleration profile 0
[ 1997.041] () dummy_mouse: (accel) acceleration factor: 2.000
[ 1997.041] (
) dummy_mouse: (accel) acceleration threshold: 4
[ 1997.041] (II) Using input driver ‘void’ for ‘dummy_keyboard’
[ 1997.041] () Option “CoreKeyboard” “true”
[ 1997.041] (
) dummy_keyboard: always reports core events
[ 1997.042] (II) XINPUT: Adding extended input device “dummy_keyboard” (type: Void, id 7)
[ 1997.042] () dummy_keyboard: (accel) keeping acceleration scheme 1
[ 1997.042] (
) dummy_keyboard: (accel) acceleration profile 0
[ 1997.042] () dummy_keyboard: (accel) acceleration factor: 2.000
[ 1997.042] (
) dummy_keyboard: (accel) acceleration threshold: 4
[ 1997.052] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[ 1997.052] (II) AutoAddDevices is off - not adding device.
[ 1997.052] (II) config/udev: Adding input device Power Button (/dev/input/event0)
[ 1997.052] (II) AutoAddDevices is off - not adding device.
[ 1997.053] (II) config/udev: Adding input device HDA Intel Line Out (/dev/input/event7)
[ 1997.053] (II) AutoAddDevices is off - not adding device.
[ 1997.053] (II) config/udev: Adding input device HDA Intel Front Headphone (/dev/input/event8)
[ 1997.053] (II) AutoAddDevices is off - not adding device.
[ 1997.053] (II) config/udev: Adding input device HDA Intel Mic (/dev/input/event5)
[ 1997.054] (II) AutoAddDevices is off - not adding device.
[ 1997.054] (II) config/udev: Adding input device HDA Intel Line (/dev/input/event6)
[ 1997.054] (II) AutoAddDevices is off - not adding device.
[ 1997.054] (II) config/udev: Adding input device USB Keyboard (/dev/input/event2)
[ 1997.054] (II) AutoAddDevices is off - not adding device.
[ 1997.055] (II) config/udev: Adding input device USB Keyboard (/dev/input/event3)
[ 1997.055] (II) AutoAddDevices is off - not adding device.
[ 1997.055] (II) config/udev: Adding input device Logitech USB Optical Mouse (/dev/input/event4)
[ 1997.055] (II) AutoAddDevices is off - not adding device.
[ 1997.056] (II) config/udev: Adding input device Logitech USB Optical Mouse (/dev/input/mouse0)
[ 1997.056] (II) AutoAddDevices is off - not adding device.
[ 1997.058] (II) config/udev: Adding input device HP WMI hotkeys (/dev/input/event9)
[ 1997.058] (II) AutoAddDevices is off - not adding device.

Not sure if this error matters, I just run the command with root permission, seems this workaround can move ahead.

Just to summary in case others meet same issue.
Jibri-xorg can start once xserver-xorg-legacy was removed on ubuntu 16.04