Public bug reported:
Binary package hint: xserver-xorg-video-mga
I have an HP Vectra VE machine with a Matrox G100 [Productiva] AGP
graphics card.
This is connected to a Compaq 472P monitor, which can display 800x600 @
60Hz.
The default configuration script in Ubuntu 6.10 produces 800x600 @ 163
Hz, which obviously doesn't work.
Modifying the xorg.conf brings the refresh rate down to 81 Hz, but this
still doesn't work.
If I create a modeline using gtf for 800x600 @ 60 Hz, put this in to the
xorg.conf and set the HorizSync and VertRefresh constraints to a
suitably narrow band around the values I want, it should produce a 60Hz
signal, but I get 81 Hz.
The Xorg.0.log shows most of the default modelines being discarded, but
my custom modeline and a few of the default ones still remain. However,
none of the remaining modelines are at anything like 81 Hz.
If I use dpkg to do a forced upgrade of xserver-xorg-video-mga from
1.4.1 (as shipped in Ubuntu 6.10) to 1.4.4 (as currently available on
Debian Testing), then the problem is fixed - it now produces 800x600 @
61 Hz (with the same xorg.conf)
Therefore, I'm forced to conclude that there is a bug in xserver-xorg-
video-mga 1.4.1.
I note that Ubuntu FeistyFawn seems to be using 1.4.6, so hopefully it's
already fixed in Feisty.
** Affects: xserver-xorg-video-mga (Ubuntu)
Importance: Undecided
Status: Unconfirmed
--
mga driver produces incorrect refresh rate on G100
https://launchpad.net/bugs/91336
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