Testing
** Changed in: nvidia-graphics-drivers (Ubuntu)
Status: Confirmed => In Progress
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https://bugs.launchpad.net/bugs/1275760
Title:
low graphics mode due to possible race condition on precise
Status in “nvidia-graphics-drivers” package in Ubuntu:
In Progress
Bug description:
Precise 12.04.4 x86_64, kernel 3.2.0-58-generic.
lspci reports:
01:00.0 VGA compatible controller: NVIDIA Corporation GF108GL [Quadro 600]
(rev a1)
dpkg -l 'nvidia*' | grep '^ii' reports:
ii nvidia-304 304.116-0ubuntu0.0.1
ii nvidia-319-updates 331.20-0ubuntu0.0.1
ii nvidia-331-updates 331.20-0ubuntu0.0.1
ii nvidia-common 1:0.2.44.2
ii nvidia-current 304.116-0ubuntu0.0.1
ii nvidia-settings 331.20-0ubuntu0.0.1
ii nvidia-settings-304 331.20-0ubuntu0.0.1
ii nvidia-settings-319-updates 331.20-0ubuntu0.0.1
ii xorg 1:7.6+12ubuntu2
Since installation, this system has periodically fallen to the
"running in low graphics mode" prompt on boot. This can always be
resolved by logging into a TTY and restarting LightDM: sudo service
lightdm restart. Recently (sorry I can't say precisely - probably the
last month or so) the frequency of this event has increased to ~90% of
boots.
Sample Xorg.0.log attached, but the key lines appear to be
[ 3.364] (EE) NVIDIA(0): Failed to initialize the NVIDIA kernel module.
Please see the
[ 3.364] (EE) NVIDIA(0): system's kernel log for additional error
messages and
[ 3.364] (EE) NVIDIA(0): consult the NVIDIA README for details.
[ 3.364] (EE) NVIDIA(0): *** Aborting ***
While `dmesg | grep nvidia` shows
[ 2.737764] nvidia: module license 'NVIDIA' taints kernel.
[ 3.658332] nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 3.658338] nvidia 0000:01:00.0: setting latency timer to 64
From the timestamps, it looks like Xorg attempts to load the nvidia
drivers 300ms before the kernel has actually loaded/initialised them,
and hence fails. This certainly looks like a race condition. By the
time I log into a TTY, lsmod shows the `nvidia` module to be loaded
and restarting lightdm succeeds.
Is there any way for either Xorg to check and if necessary wait for
kernel module loading, or the low graphics dialog at least include a
better option for dealing with this situation?
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