Vesa drv very slow on new hardware (NVS295)

[PETINOT Sylvain]

Thanks Dave !

Actually, I eclipsed this issue because the old and new platforms produce the same kind of message when X start (failing to set up write-combining range).

But thanks to your message I reconsider the problem, and it seems you were right. After a few test (because modify the /proc/mtrr cause the system to be unstable), my graphics run on the new mainboard as fast as on the old one.

Now I have to understand why my /proc/mtrr seems incoherent.

Reg00: base=0x80000000 (2048MB), size=2048MB uncacheable, count=1

And of course my graphic card needs to address in this range of memory!!

Maybe the bios is guilty??

Anyway thanks for your help (that put me on the right way!!)

Sly


-----Message d'origine-----
De : Dave Airlie [mailto:airlied at gmail.com]
Envoyé : vendredi 21 janvier 2011 02:55
À : PETINOT Sylvain
Cc : xorg at lists.freedesktop.org
Objet : Re: Vesa drv very slow on new hardware (NVS295)

On Thu, Jan 20, 2011 at 9:24 PM, PETINOT Sylvain
<SYLVAIN.PETINOT at atosorigin.com> wrote:
> Hi,
>
>
>
> I just want to submit you a problem I face.
>

(II) VESA(0): VESA VBE OEM Product Rev: Chip Rev
(II) VESA(0): Splitting WC range: base: 0xf5000000, size: 0xe00000
(II) VESA(0): Splitting WC range: base: 0xf5800000, size: 0x600000
(WW) VESA(0): Failed to set up write-combining range (0xf5c00000,0x200000)
(WW) VESA(0): Failed to set up write-combining range (0xf5800000,0x600000)
(WW) VESA(0): Failed to set up write-combining range (0xf5000000,0xe00000)
(II) VESA(0): virtual address = 0xb7111000,

I'm guessing its most likely MTRR setup not working, the new
motherboard already has MTRRs probably and doesn't cover the range you
want. have a look in /proc/mtrr and dmesg on both boards.

Dave.

________________________________


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