[Bug 34618] Slow text scrolling on tty after suspend-cycle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34618

--- Comment #24 from peterle at hottemptation.org 2011-03-31 09:25:29 PDT ---
(In reply to comment #10)
> I'm guessing this is an issue with pat or mtrrs on the fb mapping after resume.

(In reply to comment #23)
> Could it be messed up MTRRs? Just an idea...

The bug is caused by PAT and not MTRR!

I decided switching off MTRR was a try worth. The terminal scrolls without MTRR
as slow as after a suspend-cycle, so I played around with the options: And
finally switch on MTRR but PAT off!



1. General Setup
 [*]Configure standard kernel features (expert...)
2. Processor type and features
 [*]MTRR support
 [*]MTRR cleanup
 [ ]x86 PAT support

I'am so glad to know what causes this problem.

PS: I think my average fps in ioquake3 increased about 5% without x86 PAT.

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