Bug#606939: [squeeze -> 2.6.36 regression] holes in characters rendered on screen in X

[Jonathan Nieder <jrnieder@gmail.com>]

John Hughes wrote:

> I've created /usr/share/X11/xorg.conf.d/15-debugwait-hack.conf
> containing that snippet.
>
> The log shows:
>
> [    57.316] (==) intel(0): Depth 24, (--) framebuffer bpp 32
> [    57.316] (==) intel(0): RGB weight 888
> [    57.316] (==) intel(0): Default visual is TrueColor
> [    57.316] (**) intel(0): Option "DebugWait" "true"
> [    57.316] (II) intel(0): Integrated Graphics Chipset: Intel(R) 945GM
> [    57.316] (--) intel(0): Chipset: "945GM"
> [    57.316] (**) intel(0): Relaxed fencing disabled
> [    57.316] (**) intel(0): Wait on SwapBuffers? enabled
> [    57.316] (**) intel(0): Triple buffering? enabled
>
> It'll take a while to see whether that makes the problem go away.
>
> I'll send a message the moment I see the problem again, or in a few
> days if it seems fixed.

If I remember correctly, your kernel is 3.3-rc1 plus an unrelated
keyboard handling patch.

Am I correct in guessing that the glitches in font rendering didn't
happen again?

I hear that the way forward is SNA, which is enabled in the
xserver-xorg-video-intel package in experimental.  I don't know if it
requires any particular patches on top of linus's master for
kernel-side support.  cc-ing the Debian intel driver maintainers in
case they can give a hint.

Thanks,
Jonathan