FYI
This is from a thread started on lkml about a regression with 2.6.26-rc1
where artifacts are shown when X is exited if X86_PAT is enabled.
The full thread can be seen here:
http://www.gossamer-threads.com/lists/linux/kernel/914812?do=post_view_threaded
The most relevant part starts here:
http://www.gossamer-threads.com/lists/linux/kernel/915956?do=post_view_threaded
On Monday 05 May 2008, Jesse Barnes wrote:
On Monday, May 05, 2008 11:59 am Frans Pop wrote:
quoted
On Monday 05 May 2008, you wrote:
quoted
On Monday, May 05, 2008 10:32 am Frans Pop wrote:
quoted
I suspect it could be vesafb/fbcon related instead. Normally I boot
my system with 'quiet vga=791', i.e. with vesafb. I then see the
artifacts.
When I boot with 'video=vfb:off', I do _not_ get the artifacts when
X exits.
Ahhh, I missed that part of your config. That could definitely have
an effect on things... You'll probably want something like the
attached
Not sure what to make of this.
With your patch I still get the artifacts, but they are displayed a lot
shorter. I get only a flash instead of a-2 seconds.
Hm, so I guess some other user is still using UC on the region. [Note to
fb list: the patch just made vesafb use ioremap_wc instead of ioremap).
quoted
quoted
(there are other places in the fb layer that want similar treatment,
iirc, maybe fb_pgprotect?).
Do you want to try a more complete review/patch or should this be
punted over to the framebuffer folks?
Yeah, those bits have changed since I last looked at them, hopefully the
fb guys can help.
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