Bug#396032: xserver-xorg-video-vesa: [vesa] corrupted display (non 1024x768) on Matrox Millenium P650e
On Mon November 13 2006 15:08, Michel Dänzer wrote:
> On Sun, 2006-10-29 at 14:19 +0100, Peter Pöschl wrote:
> > Package: xserver-xorg-video-vesa
> > Version: 1:1.2.1-3
> > Severity: important
> >
> > After an 'aptitude dist-upgrade' on 2006-10-28 the screen is unreadable
> > on my 1600x1200 LCD display in all modes except 1024x768:
> >
> > 1280x1024 and 640x480:
> > The bottom 11cm (of 30cm) of the monitor are black.
> > In the upper part, pixel lines seem to be wrapped around, so that I can
> > make out 5 instances of the KDE 'K' logo.
> >
> >
> > 1600x1200 and 800x400:
> > The bottom 12cm (of30cm) of the monitor are black.
> > In the upper part, nothing much can be recognized, but I count distinct
> > 25 columns.
>
> Does
>
> Option "ShadowFB" "off"
>
> work around it?
I put this into the "Device" section and tried 1600x1200 and 1280x1024, but
there were no changes.
Two more observations:
1. I have no idea if this is significant, but I wondered, what would happen,
if I removed the kernel boot parameter 'vga=799' I usually use.
Result: no changes in the top part, but the bottom part now shows 24 readable
lines of kernel boot messages (of 64 fitting on the whole screen).
When I Alt-Ctrl-F1 to the console, it is 80x25 characters, but with 3 blank
lines on top and on bottom, which are not scrolled into.
2. I am reasonable sure that the problem is in the vesa driver, because I
cloned the system partition and installed the proprietary mtx driver from
Matrox. This works without problems.
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