Re: [Linux-fbdev-users] matroxfb: screen messes up after so

[Petr V. <VAN...@vc...>]

On 29 May 04 at 15:09, Jonas Meurer wrote:
> 
> The screen generally is unreadable after one new lineprint, what makes
> pagers, editors etc unusable. The screen only gets refreshed correctly,
> if I change to another tty.
> After working in X for some time, the problem sometimes vanishes and
> comes back after some time staying on the virtual consoles (tty).

Are not you using DRI in X by any chance? When mga_dri is used, it
reprograms accelerator's line length, color depth, foreground and background
color (and other not so important registers) every now and then - gnome
clock applet is known to trigger it either once a minute or once a second
(depends on seconds being displayed or not), but other apps running
in your X can trigger that too.

Only 100% fix is to stop using DRI, or disabling acceleration on console
(fbset -accel false). Or you can just decrease likelihood of corruption
by using same color depth and same resolution in both X and on the console -
then usually only one line on screen gets printed with wrong color from
time to time instead of massive corruption.
                                                    Petr