Xorg and multiple graphics cards

[Alex Deucher]

On 4/16/09, martin f krafft <madduck at madduck.net> wrote:
> also sprach Alex Deucher <alexdeucher at gmail.com> [2009.04.15.1859 +0200]:
>  > That's what zaphod mode is.  What sort of problem do you get when
>  > you use that config against the newer driver?
>
>
> Using the following software on Debian sid:
>
>  ii  xserver-xorg    1:7.3+18        the X.Org X server
>  ii  xserver-xorg-co 2:1.4.2-11      Xorg X server - core server
>  ii  xserver-xorg-vi 1:6.9.0-1+lenny X.Org X server -- ATI display driver wrapper
>
>  and the first xorg.conf included in this post
>
>   http://lists.freedesktop.org/archives/xorg/2009-April/045107.html
>
>  with ModulePath commented, such that it uses the Debian-installed
>  driver, instead of the one I custom-compiled and installed into
>  /usr/local:
>
>  0. the server starts up
>  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.

Alex