XOrg in Debian10/Buster not usable with AMD Duron / Matrox G400

[Felix Miata]

Markus Hiereth composed on 2019-08-11 22:05 (UTC+0200):
...
I was able to replicate the (EE) tail of your attached log via an
/etc/X11/xorg.conf file containing the following:

	Section "Monitor
	...
		DefaultDepth	16
	...
	EndSection

Commenting away DefaultDepth restored normal X operation.

I suggest removing any similar line you find anywhere in /etc/X11/xorg.conf.d/*,
and if that alone is insufficient, then remove /etc/X11/xorg.conf if it exists,
and all files in /etc/X11/xorg.conf.d/ that contain any of the following lines:

	Section "Device"
	Section "Monitor"
	Section "Screen"

whatever their filenames may be, then try.

If it still doesn't work, add the attached /etc/X11/xorg.conf verified working
here. Try it as-is first. It may need HorizSync and VertRefresh adjusted to match
your display. X is smart enough to auto-generate suitable modelines given
appropriate HorizSync and Vertrefresh.
-- 
Evolution as taught in public schools is religion, not science.

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/
-------------- next part --------------
Section "Device"
    Identifier "DefaultDevice"
	Driver	"mga"
EndSection

Section "Monitor"
    Identifier "DefaultMonitor"
	VendorName	"Dell"
	ModelName	"DELL 1704FPT"
	HorizSync	30-81
	VertRefresh	56-76
EndSection

Section "Screen"
    Identifier "DefaultScreen"
	Device "DefaultDevice"
	Monitor "DefaultMonitor"
EndSection