path: root/Documentation/fb/vesafb.txt
diff options
authorAntonino A. Daplas <adaplas@gmail.com>2005-11-07 01:00:49 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:52 -0800
commit8a0934f2969df4cdea81cf48fde4c8626b32325d (patch)
treecba3aa7d1367d4916a39b2113e1c9805e49b80ca /Documentation/fb/vesafb.txt
parent2726bff34441dce3854c62c3748bac2e7879e791 (diff)
[PATCH] vesafb: Disable mtrr as the default
vesafb occassionally gets the size wrong when setting the mtrr. When X or DRI attempts to set the mtrr, it will fail due to range overlap significantly affecting their performance. Disable mtrr and let the user explicitly enable it with the mtrr:n option. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/fb/vesafb.txt')
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/fb/vesafb.txt b/Documentation/fb/vesafb.txt
index 62db6758d1c..ee277dd204b 100644
--- a/Documentation/fb/vesafb.txt
+++ b/Documentation/fb/vesafb.txt
@@ -146,10 +146,10 @@ pmipal Use the protected mode interface for palette changes.
mtrr:n setup memory type range registers for the vesafb framebuffer
where n:
- 0 - disabled (equivalent to nomtrr)
+ 0 - disabled (equivalent to nomtrr) (default)
1 - uncachable
2 - write-back
- 3 - write-combining (default)
+ 3 - write-combining
4 - write-through
If you see the following in dmesg, choose the type that matches the