Hi everybody,
Like I said earlier, I've personally been using Precise with Unity on
one of my main test machines since the alpha stage, and haven't seen any
X crashes that weren't due to bugs that have since been fixed, and I
certainly haven't seen random, frequent X crashes like what seems to be
described here. That machine has its drivers and GPUs swapped
frequently, and for as long as I have been using Precise, I have always
used 295 or later drivers on it. (Compiz does seem to crash frequently,
but it always recovers, without disturbing any of the applications or
windows I have open.)
In addition to my own personal experience, which is obviously a tiny
sample, the driver goes through extensive automated and manual testing
on many different hardware configurations, and on a variety of
distributions, including Ubuntu 12.04. We haven't seen any issues that
cause X to crash sporadically, as seems to be described here.
With that in mind, we're obviously missing something important that's
required to reproduce this bug (if it is even just a single bug: it's
hard to tell, since the symptom is fairly generic). If we can collect as
much detail as possible from everybody who is affected, that would help
us understand what is happening better. The more information you
provide, the better our chances for reproducing the issue at NVIDIA.
Please provide as many of the following as possible:
1) An nvidia-bug-report.log file, generated immediately after a crash. This can
be generated by running the script `nvidia-bug-report.log.sh`, which is
included as part of the driver install. The script requires superuser
privileges to collect system information, so you should run it with sudo. The
script will save a file called nvidia-bug-report.log.gz to your current working
directory.
2) A detailed description of what you were doing at the time of the crash.
3) If you are familiar with using gdb, stack traces from the crashing server,
with X debug symbols installed, would be very helpful. If you're not familiar
with gdb, but want to try to provide a stack trace anyway, you can try
following these steps:
a) Install X debug symbols (sudo apt-get install xserver-xorg-core-dbg)
b) Start your desktop session, as normal
c) For good measure, capture the DSO load base of the NVIDIA driver, in
case it shows up in the stack trace of the crashing server. (grep nvidia_drv.so
/proc/`pidof X`/maps) - you may need to do this as root. Stash this information
away, and if nvidia_drv.so shows up in your backtrace when you get one, submit
it along with everything else.
d) Log into your system *FROM ANOTHER MACHINE* and attach a debugger to the
already running X server (gdb Xorg `pidof X`): it's important that you do this
from another machine over ssh, because after the debugger is attached, X will
be frozen until you continue. If you start the debugger from a VT on the same
machine, when X crashes later, it will be frozen, and you probably won't be
able to switch to your VT running the debugger
e) After the debugger is attached, type "continue" (or just "c") at the gdb
prompt and hit enter
f) Use your system, leaving the debugger attached the whole time. If X
crashes, the debugger will stop. Go to your machine running the debugger, and
type "backtrace" (or just "bt") and hit enter to get a backtrace at the time of
your crash. If the backtrace is long, you may have to hit enter a few more
times to see the rest of it. Copy and paste this backtrace, and submit it along
with the nvidia-bug-report.log.
It does sound like some boards are affected, and some are not, though
the boards reported so far don't have a whole lot in common with each
other. We will do our best to match the configurations reported here, in
hopes of reproducing this crash. Thanks in advance for your help. In the
meantime, for those who are affected, it does sound like unity-2d is
more stable, so perhaps you can switch to unity-2d as a temporary
workaround while waiting for this issue to be resolved.
Alberto, has anybody at Canonical been able to reproduce this?
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to nvidia-graphics-drivers in Ubuntu.
https://bugs.launchpad.net/bugs/973096
Title:
Nvidia driver causes xorg crash
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/973096/+subscriptions
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