Bug#513128: xserver-xorg-core: X server crashes every time when gnome-screensaver starts (after recent upgrade)

[Brice Goglin <Brice.Goglin@ens-lyon.org>]

Dmitri Toptygin wrote:
> Backtrace:
> 0: /usr/X11R6/bin/X(xf86SigHandler+0x7e) [0x80c91ce]
> 1: [0xb7f11400]
> 2: /usr/lib/libpixman-1.so.0 [0xb7e9d5e4]
> 3: /usr/lib/libpixman-1.so.0 [0xb7ea1646]
> 4: /usr/lib/libpixman-1.so.0(pixman_image_composite+0x569) [0xb7ea1299]
> 5: /usr/lib/xorg/modules//libfb.so(fbComposite+0x1b2) [0xb7969202]
> 6: /usr/X11R6/bin/X [0x8175613]
> 7: /usr/X11R6/bin/X(CompositePicture+0x17e) [0x815e5de]
>   

I've seen several backtraces like this, it's hard to know which one this
one is. You should try catching a better backtrace with gdb. Install
libpixman-1-0 and xserver-xorg-core-dbg, restart X, login from another
machine with ssh, run gdb -p $(pidof X) in this ssh, wait for the crash
to occur, and enter "bt full" in gdb.

> 2) You asked: "Why are you using vesa instead of radeon ?"
>
> This is because the Radeon driver never worked even once on this
> machine. When I run Windows XP on the same computer, it somehow uses the
> Radeon graphics card at its full speed, which tells me that the card is
> not broken. Under Linux I was able to use this card only with the Vesa
> driver, which gives a very bad speed; since I do not use this for games
> or movies (I only run molecular dynamics simulations and other science
> projects on this computer), the speed of the graphics card is not
> critical. Radeon driver did not work since the first time when I
> attempted to install Debian Linux. It also did not work under RedHat
> Linux, which I tried to install prior to Debian Linux.
>   

I don't know which Xorg server/driver you were running last time you try
radeon. But you have a Radeon X600, it is supposed to work very well.
You should really try again...

Brice