Red Hat Bugzilla – Bug 114274
garbled output with matroxfb and G400 dual head
Last modified: 2007-11-30 17:10:35 EST
Description of problem:
When testing kernel-2.6.1-1.57 i tried to load the matrox framebuffer
but the console output was grabled no matter what resolution i tried
Version-Release number of selected component (if applicable):
kernel-2.6.1-1.57 (i686 version)
Steps to Reproduce:
1. boot said kernel into runlevel 3
2. log in as root
2. load the matroxfb module with '/sbin/modprobe i2c-matroxfb'
The visual output on the console becomes completely garbeled and
unreadable. I try with a couple of resolutions i know by running fbset
from a remote machine and while the video mode changes it always ends
up garbled and unreadable in some way.
At least some video modes should work with matroxfb
While I don't expect fixing a subsystem that is disabled per default
in fedora to be a priority I would like to suggest disabling matroxfb
in the kernel build until it is known to work.
If you do, I promise to file a feature request when matroxfb in 2.6.x
is fixed :)
Forgot to specify the hardware. /sbin/lspci gives the following
"Matrox Graphics, Inc. Millennium G400 MAX/Dual Head 32Mb"
matroxfb is broken in the current kernel series.
for kernel-2.6.6-1.427 applying the patch from
http://ftp.cvut.cz/matroxfb/matrox-2.6.7-rc2-c1818.gz fixes the issue.
With this patch applied matroxfb works for me with a G400.
Thus, I'd like to see redhat apply that patch to their kernel-tree.
a quicker path is to push Petr to push his changes upstream.
if there's a reason he hasn't done so already, there's possibly a
reason we shouldn't take this either.