Xorg and multiple graphics cards
Alex Deucher
alexdeucher at gmail.com
Thu Apr 16 10:08:02 PDT 2009
On 4/16/09, martin f krafft <madduck at madduck.net> wrote:
> also sprach Alex Deucher <alexdeucher at gmail.com> [2009.04.16.1559 +0200]:
>
> > > 1. it displays some Radeon identification string on both heads
> > > connected to the primary card, while the head on the secondary
> > > card stays black
> > > 2. the identification string changes into the sequence
> > > "♀♀#♀#♀#♀#♀#♀", which stays there forever, but the screens
> > > eventually go black
> > > 3. the log (attached) informs me of a segfault with this backtrace:
> > >
> > > Backtrace:
> > > 0: /usr/bin/X(xf86SigHandler+0x6a) [0x47898a]
> > > 1: /lib/libc.so.6 [0x7f8e894b1190]
> > > 2: /usr/bin/X(RRCrtcSetRotations+0) [0x525c90]
> > > 3: /usr/bin/X(xf86RandR12SetRotations+0x77) [0x4b90a7]
> > > 4: /usr/bin/X(xf86CrtcScreenInit+0xad) [0x4b45ad]
> > > 5: /usr/lib/xorg/modules/drivers//radeon_drv.so(RADEONScreenInit+0x1bd8) [0x7f8e8701ef38]
> > > 6: /usr/bin/X(AddScreen+0x249) [0x436209]
> > > 7: /usr/bin/X(InitOutput+0x277) [0x46ab27]
> > > 8: /usr/bin/X(main+0x2c6) [0x4369f6]
> > > 9: /lib/libc.so.6(__libc_start_main+0xe6) [0x7f8e8949d5a6]
> > > 10: /usr/bin/X [0x435e99]
> > >
> > > Fatal server error:
> > > Caught signal 11. Server aborting
> >
> > Does it work any better with xserver 1.5 or newer? IIRC, there was a
> > bug where RRCrtcSetRotations() dereferenced pScrn->pScreen before it
> > was set. I don't remember off hand when it was fixed however.
>
>
> I now tried:
>
> (II) Module radeon: vendor="X.Org Foundation"
> compiled for 1.6.0, module version = 6.12.2
> Module class: X.Org Video Driver
> ABI class: X.Org Video Driver, version 5.0
>
> and I get the exact same behaviour described under (1) and (2),
> although (1) passes a lot quicker, and the backtrace is slightly
> different:
>
> Backtrace:
> 0: /usr/bin/X(xorg_backtrace+0x26) [0x4ef046]
> 1: /usr/bin/X(xf86SigHandler+0x39) [0x484219]
> 2: /lib/libc.so.6 [0x7fed7f3da190]
> 3: /usr/bin/X(dixLookupPrivate+0xa) [0x433b7a]
> 4: /usr/lib/xorg/modules//libxaa.so [0x7fed7c9615e2]
> 5: /usr/lib/xorg/modules/drivers//radeon_drv.so [0x7fed7d22a2c1]
> 6: /usr/bin/X(xf86CrtcSetModeTransform+0x129) [0x4ac0a9]
> 7: /usr/bin/X(xf86SetDesiredModes+0x2a9) [0x4ac939]
> 8: /usr/lib/xorg/modules/drivers//radeon_drv.so [0x7fed7d20ab1f]
> 9: /usr/bin/X(AddScreen+0x1c6) [0x432846]
> 10: /usr/bin/X(InitOutput+0x241) [0x46d111]
> 11: /usr/bin/X(main+0x20e) [0x432f5e]
> 12: /lib/libc.so.6(__libc_start_main+0xe6) [0x7fed7f3c65a6]
> 13: /usr/bin/X [0x432599]
>
> Thanks again for your time!
>
Can you get a full backtrace with gdb?
http://wiki.x.org/wiki/Development/Documentation/ServerDebugging
Thanks,
Alex
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