Hi,

Pretty sure gnome-shell is not the correct place for this bug, but I have to put it somewhere, sorry.

I'm running without a background picture, but instead with a solid background color, when I change that from say #000000 to #000001, one of 3 things can happen:

1) I sometimes get some "flashes" while redrawing happens and all is then all
   is well
2) I sometimes get some "flashes" while redrawing happens and end up with the
   wrong background color (not necessarily the previous one, but one in between
   ??) Note I've only seen this one once when going from solid red -> solid
   black. I ended up with a very dark red background (instead of really black).
3) My session quits and I end up back in gdm (reproducable) when this happens
   /var/log/messages contains:
   Mar 25 15:56:40 shalem gnome-session[5247]: Gdk-WARNING: gnome-session:
    Fatal IO error 11 (Resource temporarily unavailable) on X server :0.#012

   So whatever is happening seems to result in hitting the X server pretty
   heavily. Note it would be nice if whatever component in the stack which
   is throwing the fatal error on EAGAIN, would instead try again.

My system is a quad core amd64 machine, using an ATI X1950 pro as gpu, with
a fully up2date F-15 install (and using the FOSS xorg drivers, as shipped with
F-15).

Regards,

Hans