Re: [2.6.25-rc6] possible regression: X server dying

[Pavel Machek <pavel@ucw.cz>]

On Tue 2008-03-25 10:53:38, Dave Airlie wrote:
> On Tue, Mar 25, 2008 at 9:45 AM, Tilman Schmidt <tilman@imap.cc> wrote:
> > On Tue, 25 Mar 2008 09:22:32 +1000, Dave Airlie wrote:
> >  > On Tue, Mar 25, 2008 at 8:38 AM, Tilman Schmidt <tilman@imap.cc> wrote:
> >  >> In the five days since I booted a 2.6.25-rc6 kernel on my development
> >  >>  machine, it has happened three times already that I came back to the
> >  >>  machine to find that the X server had exited, killing all applications
> >  >>  that still had a window open. [...]
> >
> > >
> >  > anything in the X.org logfiles?
> >
> >  Ah, of course. Sorry I forgot. Xorg.0.log.old ends with this:
> >
> >  | Backtrace:
> >  | 0: /usr/bin/X(xf86SigHandler+0x81) [0x80e6d81]
> >  | 1: [0xb7fc9400]
> >  | 2:
> >  /usr/lib/xorg/modules//extensions/libGLcore.so(_swrast_Triangle+0x2d)
> >  [0xb51ea5dd]
> >  | 3: /usr/lib/xorg/modules//extensions/libGLcore.so [0xb51f1075]
> >  | 4: /usr/lib/xorg/modules//extensions/libGLcore.so [0xb5206f2e]
> >  | 5: /usr/lib/xorg/modules//extensions/libGLcore.so [0xb52080b8]
> >  | 6:
> >  /usr/lib/xorg/modules//extensions/libGLcore.so(_tnl_run_pipeline+0x153)
> >  [0xb520cb83]
> >  | 7:
> >  /usr/lib/xorg/modules//extensions/libGLcore.so(_tnl_draw_prims+0x3f0)
> >  [0xb51f8340]
> >  | 8:
> >  /usr/lib/xorg/modules//extensions/libGLcore.so(vbo_exec_vtx_flush+0x1fb)
> >  [0xb52471eb]
> >  | 9:
> >  /usr/lib/xorg/modules//extensions/libGLcore.so(vbo_exec_FlushVertices+0x78)
> >  [0xb52488e8]
> >  | 10: /usr/lib/xorg/modules//extensions/libGLcore.so(_mesa_Flush+0x83)
> >  [0xb5112663]
> >  | 11: /usr/lib/xorg/modules//extensions/libglx.so [0xb7c6a107]
> >  | 12: /usr/lib/xorg/modules//extensions/libglx.so [0xb7c4aa6d]
> >  | 13: /usr/bin/X [0x815809e]
> >  | 14: /usr/bin/X(Dispatch+0x1af) [0x808f68f]
> >  | 15: /usr/bin/X(main+0x47e) [0x807717e]
> >  | 16: /lib/libc.so.6(__libc_start_main+0xe0) [0xb7d5dfe0]
> >  | 17: /usr/bin/X(FontFileCompleteXLFD+0x1e5) [0x8076501]
> >  |
> >  | Fatal server error:
> >  | Caught signal 11.  Server aborting
> >
> >  I have put the entire file at
> >  http://gollum.phnxsoft.com/~ts/linux/Xorg.0.log.old
> >  in case you want to have a look.
> >
> >
> >  > does it happen with DRI off?
> >
> >  I guess it does, as my Xorg.0.log{,.old} says:
> >
> >  | (WW) MGA(0): Direct rendering disabled
> >
> >  HTH
> >  Tilman
> >
> 
> Looks like a GL screensaver kicks in and blows away your X server sw-GL..
> 
> not sure how a new kernel could cause this though..
> 
> memory layout changes maybe..

You can try to disable heap randomization...

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