From: "Antonino A. Daplas" <adaplas@gmail.com>
To: Hai Zaar <haizaar@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: vesa fb is slow on 2.6.15.1
Date: Thu, 26 Jan 2006 22:51:26 +0800 [thread overview]
Message-ID: <43D8E1EE.3040302@gmail.com> (raw)
In-Reply-To: <cfb54190601260620l5848ba3ai9d7e06c41d98c362@mail.gmail.com>
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
Tony
next prev parent reply other threads:[~2006-01-26 14:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-26 14:20 vesa fb is slow on 2.6.15.1 Hai Zaar
2006-01-26 14:51 ` Antonino A. Daplas [this message]
2006-01-26 16:06 ` Hai Zaar
2006-01-26 16:40 ` Alistair John Strachan
2006-01-26 22:04 ` Antonino A. Daplas
2006-01-27 0:10 ` Hai Zaar
2006-01-27 0:19 ` Hai Zaar
2006-01-27 6:02 ` Antonino A. Daplas
2006-01-27 16:32 ` Hai Zaar
2006-01-27 17:21 ` Antonino A. Daplas
2006-01-28 0:31 ` Hai Zaar
[not found] ` <cfb54190601271628j774df3d0xce0ab24c8abca845@mail.gmail.com>
[not found] ` <43DABCF6.4000904@gmail.com>
2006-01-28 0:54 ` Hai Zaar
2006-01-28 1:02 ` Antonino A. Daplas
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