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authorAntonino A. Daplas <adaplas@gmail.com>2005-11-07 04:00:49 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 10:53:52 -0500
commit8a0934f2969df4cdea81cf48fde4c8626b32325d (patch)
treecba3aa7d1367d4916a39b2113e1c9805e49b80ca /Documentation/fb
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')
-rw-r--r--Documentation/fb/vesafb.txt4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/fb/vesafb.txt b/Documentation/fb/vesafb.txt
index 62db6758d1c1..ee277dd204b0 100644
--- a/Documentation/fb/vesafb.txt
+++ b/Documentation/fb/vesafb.txt
@@ -146,10 +146,10 @@ pmipal Use the protected mode interface for palette changes.
146 146
147mtrr:n setup memory type range registers for the vesafb framebuffer 147mtrr:n setup memory type range registers for the vesafb framebuffer
148 where n: 148 where n:
149 0 - disabled (equivalent to nomtrr) 149 0 - disabled (equivalent to nomtrr) (default)
150 1 - uncachable 150 1 - uncachable
151 2 - write-back 151 2 - write-back
152 3 - write-combining (default) 152 3 - write-combining
153 4 - write-through 153 4 - write-through
154 154
155 If you see the following in dmesg, choose the type that matches the 155 If you see the following in dmesg, choose the type that matches the