Bug#496608: xserver-xorg-video-radeon: Segv on startup with multi-head config and fixed-frequency monitor

[Alex Deucher]

On Mon, Aug 25, 2008 at 11:32 PM, Peter Chubb <peterc at gelato.unsw.edu.au> wrote:
> Package: xserver-xorg-video-radeon
> Version: 1:6.9.0-1+lenny2
> Severity: normal
>
> I'm trying to get a fixed-frequency grey-scale monitor going on the external
> DVI port on my laptop. The monitor attaches via three BNC connectors (for
> VSYNC, HSYNC and level) The monitor does NOT do EDID or DDC.
>
> If Xinerama is turned off, I don't get a segfault, but attempting to
> move the mouse cursor onto the external screen causes both screens to go blank,
> and the only recourse is a reboot.
>
>

Unless you need zaphod and xinerama for something, I'd suggest
removing the second device section and just use xrandr to configure
dualhead.  zaphod mode only supports one output per driver instance
and in your case LVDS and VGA are getting selected.  If you want to be
able to use LVDS, VGA, and DVI, you'll need to use xrandr.  Also, your
DVI port is DVI-D (digital only) so it won't be able to run your
analog monitor.  See this page for more on xrandr:
http://wiki.debian.org/XStrikeForce/HowToRandR12

As to the crash, anyway you could get a proper backtrace with GDB?

Alex