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SubjectRe: [2.6.25-rc6] possible regression: X server dying
On Mon, Apr 7, 2008 at 3:22 PM, Tilman Schmidt <> wrote:
> This is still quite elusive. It only happens once every couple of days,
> and the only thing that seems to be clear is that it's triggered by a GL
> screensaver. So if it's ok I'll continue sharing X crash backtraces
> while I go on groping for a lead. Here's my next one, this time with
> kernel 2.6.25-rc8:
> 0: /usr/bin/X(xf86SigHandler+0x81) [0x80e6d81]
> 1: [0xb7f22400]
> 2:
> /usr/lib/xorg/modules//extensions/
> [0xb50aa673]
> 3: /usr/lib/xorg/modules//extensions/
> [0xb50abc1a]
> 4: /usr/lib/xorg/modules//extensions/ [0xb7ba8b98]
> 5: /usr/lib/xorg/modules//extensions/ [0xb7ba145d]
> 6: /usr/lib/xorg/modules//extensions/ [0xb7ba157c]
> 7: /usr/lib/xorg/modules//extensions/ [0xb7ba5a6d]
> 8: /usr/bin/X [0x815809e]
> 9: /usr/bin/X(Dispatch+0x1af) [0x808f68f]
> 10: /usr/bin/X(main+0x47e) [0x807717e]
> 11: /lib/ [0xb7cb6fe0]
> 12: /usr/bin/X(FontFileCompleteXLFD+0x1e5) [0x8076501]
> As for Pavel's suggestion of disabling heap randomization, given the
> current crash rate I'd have to try that for several weeks before I could
> be reasonably sure that it helped. I think it'll be more useful if I go
> on looking for a way to reproduce the crash more reliably. Perhaps I
> should start playing some GL based games. :-)

If you think it's one of the screensavers but don't know which one,
then open up a bash shell and do a

for i in /usr/lib/xscreensaver/*; do echo $i; $i ; done

hitting control-c to break out of the screensaver when you think it's
been cleared of any wrongdoing. They'll default to rendering in a
window rather than the root window, but perhaps that'll be good enough
to hit the bug (it also lets you see the name of the screensaver it
just ran).

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