Messages in this thread | | | Date | Thu, 26 Jan 2006 22:51:26 +0800 | From | "Antonino A. Daplas" <> | Subject | Re: vesa fb is slow on 2.6.15.1 |
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Hai Zaar wrote: > > # cat /proc/mtrr > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 > reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 > reg02: base=0xc0000000 (3072MB), size= 512MB: write-back, count=1 > reg03: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 > reg04: base=0xfeda0000 (4077MB), size= 128KB: uncachable, count=1 > > No 'write-combining' entry! But with 2.6.11.12 I do have one: > <2.6.11.12 system> cat /proc/mtrr > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 > reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1 > reg02: base=0xc0000000 (3072MB), size= 512MB: write-back, count=1 > reg03: base=0x100000000 (4096MB), size= 512MB: write-back, count=1 > reg04: base=0xfeda0000 (4077MB), size= 128KB: uncachable, count=1 > reg05: base=0xf0000000 (3840MB), size= 128MB: write-combining, count=1
mtrr now defaults to off in vesafb because of conflicts with xorg/ xfree86. You have to explicitly enable it with a boot option. Try this:
video=vesafb:mtrr:3,ypan
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