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

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Date:	Sun, 06 Apr 2008 16:34:34 +0200
From:	"Gerhard Pircher" <gerhard_pircher@....net>
To:	"Dave Airlie" <airlied@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [2.6.25-rc6] possible regression: X server dying

-------- Original-Nachricht --------
> Datum: Sun, 6 Apr 2008 17:44:25 +1000
> Von: "Dave Airlie" <airlied@...il.com>
> An: "Tilman Schmidt" <tilman@...p.cc>
> CC: linux-kernel@...r.kernel.org
> Betreff: Re: [2.6.25-rc6] possible regression: X server dying

> >  0: /usr/bin/X(xf86SigHandler+0x81) [0x80e6d81]
> >  1: [0xb7ef7400]
> >  2: /usr/lib/xorg/modules//extensions/libglx.so [0xb7b7d8e8]
> >  3: /usr/lib/xorg/modules//extensions/libglx.so(DoRender+0xdd)
> [0xb7b7645d]
> >  4: /usr/lib/xorg/modules//extensions/libglx.so [0xb7b7657c]
> >  5: /usr/lib/xorg/modules//extensions/libglx.so [0xb7b7aa6d]
> >  6: /usr/bin/X [0x815809e]
> >
> >  7: /usr/bin/X(Dispatch+0x1af) [0x808f68f]
> >  8: /usr/bin/X(main+0x47e) [0x807717e]
> >  9: /lib/libc.so.6(__libc_start_main+0xe0) [0xb7c8bfe0]
> >  10: /usr/bin/X(FontFileCompleteXLFD+0x1e5) [0x8076501]
> >
> >  But I know next to nothing about GL, so I'm out of my depth there.
> >  I'd welcome any suggestions on how to provoke the crash more
> >  regularly so that I could attempt to bisect.
> 
> Its one of the GL screensavers, not sure how to narrow it down, use
> ldd to figure out which ones are using GL.
> 
> I've no idea how the kernel is influencing this.
> 
> Dave.

Sorry for hijacking this thread, but I have a similar problem with the
Xorg X server. I'm using kernel 2.6.25-rc8 on my AmigaOne (PowerPC) and
the X server dies right on startup, but only if DRI/DRM is enabled.
I tested this with both Xorg 7.1 (Debian Etch version) and Xorg 7.2
(Lenny). The X server was working fine with kernel 2.6.25-rc6. I have
to mention that the AmigaOne uses uncached memory for DMA operations.
Benjamin Herrenschmidt fixed DRI recently for non cache coherent systems
and his patches are working fine (I applied them to kernel 2.6.25-rc6).
Please take a look at the attached Xorg.0.log file or at the excerpt
below:

(**) RADEON(0): Initializing backing store
(==) RADEON(0): Backing store disabled
(**) RADEON(0): DRI Finishing init !
(II) RADEON(0): X context handle = 0x1

Backtrace:
0: /usr/bin/X(xf86SigHandler+0x94) [0x100934c4]
1: [0x100374]
2: [0x102272a8]
3: /usr/lib/xorg/modules/extensions//libdri.so(DRIFinishScreenInit+0xb0) [0xf9948b0]
4: /usr/lib/xorg/modules/drivers//radeon_drv.so(RADEONDRIFinishScreenInit+0x68) [0xf8a699c]
5: /usr/lib/xorg/modules/drivers//radeon_drv.so(RADEONScreenInit+0xf74) [0xf895f78]
6: /usr/bin/X(AddScreen+0x21c) [0x1002d79c]
7: /usr/bin/X(InitOutput+0x284) [0x1006d364]
8: /usr/bin/X(main+0x294) [0x1002e004]
9: /lib/libc.so.6 [0xfc75b10]
10: /lib/libc.so.6 [0xfc75cd0]

Fatal server error:
Caught signal 11.  Server aborting

(**) RADEON(0): RADEONLeaveVT

regards,

Gerhard

BTW: Please put me on CC:!
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View attachment "Xorg.0.log" of type "text/x-log" (51364 bytes)