[nylug-talk] New Kernel

[Sunny Dubey]

Am Montag, 24. Juli 2006 10:39 schrieb FleX:
> I have a PC with a Matrox G550 that works perfectly with Vanilla Kernel
> 2.6.11, but when I try to use kernel 2.6.15-1 Debian or 2.6.17 vanilla
> my screen is not good, it flashes as if I set a wrong resolution.

NOTE:  I haven't touched this stuff in a while, so I maybe off ...

To the best of my knowledge Xorg is largely independent of your kernel except 
when DRI is involved .... (DRI provides hardware accelerated OpenGL 
performance, 3D graphics essentially)  Being that your video card is 
supported by DRI, and you're having X issues due to your kernel upgrade 
suggests issues with DRI to be the case :^)

Boot with your working regular kernel and issue the following commands as a 
regular user:

glxinfo | grep ^direct

/sbin/lsmod | grep mga

If the first returns "yes" and the second returns the mga kernel, it means you 
are using DRI properly.

What *MAY* be happening is that by upgrading your kernel, you are obviously 
upgrading your DRM (direct rendering management) mga driver, which times is 
pure voodoo and likely not to work for dumb reasons.

A simple solution maybe to prevent your computer from loading the mga driver 
and remove the DRI relevant parts of your X.org conf file.  This will totally 
disable your OpenGL support, and may cause your video to work.

make backup of all config files first!  and good luck

(post not spell checked!)

-- 
Sunny Dubey

  mail: sunny at opencurve.org
  tele: 212.333.3542