Bug#618900: xserver-xorg-video-mga: does not work with MGA G100 chip

[Tormod Volden <debian.tormod@gmail.com>]

I have gone through the logs. The detected max dotclock of the monitor
(from EDID) has changed from 90 to 95 MHz. The default mode has
changed from 1280x768@80.1Hz to 1360x768@84.8Hz.

Does it help to change resolution, for instance by blind-typing
"xrandr -s 800x600" ?

Can you please also provide the output from "xrandr --verbose" in both cases?
Either by blind-typing, or starting X like this:
 xinit -e 'sh -c "xrandr --verbose > xrandr.log" '

Also, with only 6MB of video RAM, you may want to reduce the color
depth. Try starting X with:
 xinit -- -depth 16
and you might get more available resolutions.