I've got a Matrox Mystique 220, and I was experiencing the problem
described in the original report (monitor gave me "Signal out of Range"
when using the mga driver). The package posted by John Dong above fixes
that problem, but when I drag around windows etc. I get display errors,
as you can see on this screenshot:
http://img349.imageshack.us/img349/673/bildschirmphoto1az2.png

It was the same thing when I tried one of the workarounds described
above, before John Dongs package was released (comment out the mga part
in /etc/modprobe.d/blacklist-framebuffer, and add Option "UseFBDev"
"True" to the monitor portion of xorg.conf). I reverted those changes
before installing John Dong's package, but the display errors, as seen
in the screenshot, are still there... any pointers?

I noticed that when I type "lsmod", the vesafb module (which has
something to do with framebuffering) appears loaded, and I can't unload
it. Could that have anything to do with it?

-- 
Edgy upgrade breaks multiple Matrox cards
https://launchpad.net/bugs/58721

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