Re: Matrox FB console driver

[Petr Vandrovec]

On Tue, Apr 24, 2001 at 06:19:31AM -0500, Andy Carlson wrote:
> time prime before x
> real    1m23.535s
> user    0m40.550s
> sys     0m42.980s
> 
> time prime in X
> real    0m42.835s
> user    0m41.180s
> sys     0m1.710s

There can be two reasons:
(1) You are using matrox's mga module. They have
    'program chip core to production level frequency
    instead of bios safe one' in their changelog.
    Although difference 100% makes (2) more probably.
(2) matroxfb does not try to activate any AGP transfer
    mode. Maybe some X driver tries and succeeds.

You can try:

time dd if=/dev/zero of=/dev/fb0 bs=1M count=8

before X and after X. If times are same, then it is
chip core frequency. If times are 2:1, it is either
chip memory freqency, or AGP...
				Petr Vandrovec
				[e-mail]