many crashes of X server, what should I investigate?

[Kernel Guardian]

On 2 January 2013 08:42, Frédéric Bron <frederic.bron at m4x.org> wrote:

> >> I have many crashes of the X server:
> >> - freezing when switching between user
> >> - freezing when starting a session
> >
> > What kind of machine are you running F17 on?  What processor?  How much
> > memory?  What video card?
>
> I have a laptop with:
> Processor Intel® Core I7 - I7-2760QM - 2.40 GHz / 3.50 GHz (Max Turbo
> Freq.) - (Quad-core mobile - Socket FCPGA988 - 6 Mo cache L2 - 32 nm -
> 45 W - 64-bitsVirtualisation - Hyperthreading (8 threads) - integrated
> * HD Graphics 3000)*
> LED screen 17.3" Full-HD 1920 x 1080 TFT
> 16 Go SO-DIMM RAM DDR-3 / 1333 MHz (4 x 4 Go)
> * Video controler nVidia GeForce GTX 560M with 1.5 Go dedicated VRAM*


Looks like your laptop equipped with Optimus chipset. If you are have
option in BIOS to disable nVidia that would be one of the solutions.
More info you can find
there<http://hybrid-graphics-linux.tuxfamily.org/index.php?title=Main_Page>
. I
recently read that it is possible to use Optimus with Bumblebee, but I'm
not sure if it was an F17 or F18.


>
> DDR-5 (Support PCIe x16, DirectX 11, nVidia PhysX, HDMI 1.4, HDCP,
> GeForce CUDA)
> Chipset Intel HM67 2nd generation
> Technology PCI-Express
> Main bus (FSB) 1333 MHz
> Technology Intel® for processors Intel® Core I7 and Core I7 Extreme
> Edition Sandy Bridge 2nd generation (64-bits mobile)
> Support PCI-Express x16 et DirectX 11
> Graphical accelerator 2D/3D at 128 bits, decoding MPEG I & II, DVD-playback
>
> I have installed F17 64 bits: Linux mymachine 3.6.10-2.fc17.x86_64 #1
> SMP Tue Dec 11 18:07:34 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
>
> >  Do you have it overclocked?
>
> No
>
> > Are you using the
> > default video driver that comes with F17 or did you install the
> proprietary
> > video driver issued by the video chip manufacturer?
>
> I am using the nvidia proprietary driver (I used kmod-nvidia and
> switched to akmod-nvidia recently because the 3.6.10 driver did not
> come but this did not change anything).
> I have read a thread that reports the same issue on gdm bug tracker
> and someone tried both nvidia and nouveau with no difference but I
> have not done it myself.
>
> > Do you have another machine networked to this machine?  If you do you can
> > open a terminal session on this machine using ssh.  You might find some
> > clues in dmesg
>
> I will try that. I have just tested that I can connect by ssh and it works
> fine.
> Halas, I could not reproduce the freeze but I got only a small freeze
> (30 sec.) and dmesg during that freeze gave:
>
> [62645.848785] SELinux: initialized (dev fuse, type fuse), uses
> genfs_contexts
> [62906.805823] SELinux: initialized (dev fuse, type fuse), uses
> genfs_contexts
> [62965.449065] nepomukservices[26117]: segfault at 0 ip
> (null) sp 00007fff6096e428 error 14 in nepomukservicestub[400000+7000]
> [63022.645742] NVRM: GPU at 0000:01:00:
> GPU-a26ca184-dbb8-cb76-a255-3c1db789ce86
> [63022.645758] NVRM: Xid (0000:01:00): 31, Ch 00000002, engmask
> 00000101, intr 10000000
> [63023.160005] NVRM: Xid (0000:01:00): 8, Channel 00000004
>
> I see also that after trying to open lots of sessions and close them,
> my 16 Gb memory is full and I had difficulties openning a new terminal
> because it said "bash fork retry no child processes". I do not know if
> it is linked but I read somewhere that when X freezes, it may be due
> to memory leaks...
>
> I will come back later with more info if a new crash happen.
>
> Thanks,
>
> Frédéric
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