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SubjectX sloow under 2.6.9 and up - mtrr ?
Hi all...

I have built 2.6.10-rc2-mm1, and as nVidia drivers do not work with it,
i configured xorg-6.8.1 to use the standard 'nv' driver.
But now X redraws are dog slow, you can count pixels redrawing on the
screen if you move a window in filled mode.

Somebodyt has a clue about why can this be happening ?
From deep in my memory I remember this was related to mtrr settings.
With the nVidia driver I have:

werewolf:~> cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
reg01: base=0x3ff00000 (1023MB), size= 1MB: uncachable, count=1
reg02: base=0xe0000000 (3584MB), size= 128MB: write-combining, count=1
reg03: base=0xe8000000 (3712MB), size= 128MB: write-combining, count=1

and with the nv standard driver:

reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
reg01: base=0x3ff00000 (1023MB), size= 1MB: uncachable, count=1
reg02: base=0xe8000000 (3712MB), size= 128MB: write-combining, count=1

One is missing. It is an i875P chipset.

Any idea ?

Ah, this also happens on one other box, also with an nvidia card, but this
box never had the binary drivers installed, it is just a server.
This one is a Via Apollo Pro266, and its mtrr:
nada:~# cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
reg01: base=0xf0000000 (3840MB), size= 64MB: write-combining, count=1
reg02: base=0xe8000000 (3712MB), size= 64MB: write-combining, count=1

TIA

--
J.A. Magallon <jamagallon()able!es> \ Software is like sex:
werewolf!able!es \ It's better when it's free
Mandrakelinux release 10.2 (Cooker) for i586
Linux 2.6.9-jam1 (gcc 3.4.1 (Mandrakelinux 10.1 3.4.1-4mdk)) #10


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