[Intel-gfx] regression on vanilla kernel "drm/i915: framebuffer compression for pre-GM45"

[Jesse Barnes]

On Tue, 29 Sep 2009 20:23:19 +0200
Alexey Fisher <bug-track at fisher-privat.net> wrote:

> Alexey Fisher schrieb:
> > Jesse Barnes schrieb:
> >> On Fri, 25 Sep 2009 12:57:06 +0200
> >> Alexey Fisher <bug-track at fisher-privat.net> wrote:
> >>
> >>> Hallo Barnes,
> >>> i just found regression on vanilla kerenl. On my eeepc p1005ha
> >>> after this patch xorg will be heavy loaded with cursor flickering.
> >>>
> >>>
> >>>
> >>> commit 8082400327d8d2ca54254b593644942bed0edd25
> >>> Author: Jesse Barnes <jbarnes at virtuousgeek.org>
> >>> Date:   Thu Sep 10 15:28:06 2009 -0700
> >>>
> >>>      drm/i915: framebuffer compression for pre-GM45
> >>>
> >>>      This patch adds framebuffer compression (good for about ~0.5W
> >>> power savings in the best case) support for pre-GM45 chips.  GM45+
> >>> have a new,
> >>>      more flexible FBC scheme that will be added in a separate
> >>> patch.
> >>>
> >>>      FBC can't always be enabled: the compressed buffer must be
> >>> physically contiguous and reside in stolen space.  So if you have
> >>> a large display and a small amount of stolen memory, you may not
> >>> be able to take advantage of FBC.  In some cases, a BIOS setting
> >>> controls how much stolen space is available.  Increasing this to
> >>> 8 or 16M can help.
> >>>
> >>>      Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> >>>      Signed-off-by: Eric Anholt <eric at anholt.net>
> >>
> >> Can you load drm with debug=1 and send me the output from when i915
> >> loads?
> >>
> >> Jesse
> > 
> > Here is it.
> > Alexey
> 
> With newest xorg driver i do not have this problem. The patch from
> Brian Rogers solves this problem for old driver too.

Great, thanks for confirming (I was hoping that it would fix your issue
too).

Jesse