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| author | Antonino A. Daplas <adaplas@gmail.com> | 2005-11-07 01:00:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-07 07:53:52 -0800 |
| commit | 8a0934f2969df4cdea81cf48fde4c8626b32325d (patch) | |
| tree | cba3aa7d1367d4916a39b2113e1c9805e49b80ca | |
| parent | 2726bff34441dce3854c62c3748bac2e7879e791 (diff) | |
| download | linux-8a0934f2969df4cdea81cf48fde4c8626b32325d.tar.bz2 | |
[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>
| -rw-r--r-- | Documentation/fb/vesafb.txt | 4 | ||||
| -rw-r--r-- | drivers/video/vesafb.c | 2 |
2 files changed, 3 insertions, 3 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. 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 diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c index 67e215443953..e25eae1a78c1 100644 --- a/drivers/video/vesafb.c +++ b/drivers/video/vesafb.c @@ -48,7 +48,7 @@ static struct fb_fix_screeninfo vesafb_fix __initdata = { }; static int inverse = 0; -static int mtrr = 3; /* default to write-combining */ +static int mtrr = 0; /* disable mtrr */ static int vram_remap __initdata = 0; /* Set amount of memory to be used */ static int vram_total __initdata = 0; /* Set total amount of memory */ static int pmi_setpal = 0; /* pmi for palette changes ??? */ |