A little bit of debugging and investigating confirm what is in log
above:
libmutter cannot get a monitor and crashes here:
https://github.com/GNOME/mutter/blob/master/src/backends/meta-backend.c#L128-L133
primary =
meta_monitor_manager_get_primary_logical_monitor (monitor_manager);
meta_backend_warp_pointer (backend,
primary->rect.x + primary->rect.width / 2,
primary->rect.y + primary->rect.height / 2);
because 'primary' is not a valid pointer.
So,
1. This should be reported to gnome/mutter developers, so they check all their
pointers and terminate in clean way with meta_fatal("failed to get primary
monitor"); or something like that.
2. We have to understand, why libmutter fails to get primary logical monitor.
Does Xorg need some permissions?
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https://bugs.launchpad.net/bugs/1672033
Title:
Xorg does not work in rootless mode on nvidia proprietary drivers
(GNOME)
Status in NVIDIA Drivers Ubuntu:
New
Status in mutter package in Ubuntu:
New
Status in xorg package in Ubuntu:
New
Bug description:
There are two bug reports in LP: #1559576, LP: #1632322 and also LP:
#1666664, where GDM does not start on proprietary nvidia drivers. As
it turned out, the reason for that was Xorg starting in rootless mode
and apparently not initializing everything properly, which was causing
gnome-shell/libmutter to crash.
Installing xserver-xorg-legacy did partially fix those issues.
Enabling modesetting for nvidia driver however still causes the
problem.
Here are some parts from log:
Xorg startup:
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (--) Log file
renamed from "/var/lib/gdm3/.local/share/xorg/Xorg.pid-2027.log" to
"/var/lib/gdm3/.local/share/xorg/Xorg.0.log"
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: X.Org X Server
1.18.4
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: Release Date:
2016-07-19
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: X Protocol Version
11, Revision 0
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: Build Operating
System: Linux 4.4.0-53-generic x86_64 Ubuntu
glx loaded:
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) LoadModule:
"glx"
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) Loading
/usr/lib/x86_64-linux-gnu/xorg/extra-modules/libglx.so
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) Module glx:
vendor="NVIDIA Corporation"
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: compiled
for 4.0.2, module version = 1.0.0
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: Module
class: X.Org Server Extension
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) NVIDIA GLX
Module 375.39 Tue Jan 31 19:37:12 PST 2017
nvidia loaded:
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) LoadModule:
"nvidia"
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) Loading
/usr/lib/x86_64-linux-gnu/xorg/extra-modules/nvidia_drv.so
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) Module nvidia:
vendor="NVIDIA Corporation"
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: compiled
for 4.0.2, module version = 1.0.0
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: Module
class: X.Org Video Driver
modesetting loaded:
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) LoadModule:
"modesetting"
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) Loading
/usr/lib/xorg/modules/drivers/modesetting_drv.so
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) Module
modesetting: vendor="X.Org Foundation"
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: compiled
for 1.18.4, module version = 1.18.4
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: Module
class: X.Org Video Driver
Mär 11 00:43:18 arvlin /usr/lib/gdm3/gdm-x-session[2025]: ABI class:
X.Org Video Driver, version 20.0
gnome-shell fails to run:
Mär 11 00:43:20 arvlin kernel: gnome-shell[2067]: segfault at 28 ip
00007fedba8da7c4 sp 00007ffd2fb5f5a0 error 4 in
libmutter-0.so.0.0.0[7fedba893000+12f000]
xorg stops:
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) UnloadModule:
"libinput"
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II)
systemd-logind: releasing fd for 13:66
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) UnloadModule:
"libinput"
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II)
systemd-logind: releasing fd for 13:67
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) UnloadModule:
"libinput"
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II)
systemd-logind: releasing fd for 13:64
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) UnloadModule:
"libinput"
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II)
systemd-logind: releasing fd for 13:65
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) NVIDIA(GPU-0):
Deleting GPU-0
Mär 11 00:43:21 arvlin /usr/lib/gdm3/gdm-x-session[2025]: (II) Server
terminated successfully (0). Closing log file.
Mär 11 00:43:21 arvlin gdm-launch-environment][2009]:
pam_unix(gdm-launch-environment:session): session closed for user gdm
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