G450-etv (no DVI) at 1920x1200 = image too wide

[Georges]

Hi

I just bought a brand new 1920x1200 HP monitor (LP2465) and have a problem to get it correctly get it connected to my old G450-eTV
OS: ubuntu edgy (6.10), X 7.1.1, mga 1.4.4

I think I came down to this being the cause:
In the X logfile it says
(II) MGA(0): Ranges: V min: 48 V max: 85 Hz, H min: 30 H max: 94 kHz, PixClock max 170 MHz

Why 170Mhz? This card is supposed to do up to 2048x1536 at 85Hz with a clock of 360Mhz

Result is that I am stuck to a sub-60Hz setting which is wrongly detected by the monitor. It either displays it too wide, cutting off on the left and right (there is no monitor setting to correct this) or it displays too narrow, and way off to the right (about 1/3).
Playing around with xvidtune, the best modeline I found was this

ModeLine "1920x1200" 167.73 1920 1924 2404 2408 1200 1203 1217 1244 #55.99Hz

which is the "way to wide" setting.
Anyone else running a G450 at high resolution?

[tuxx-home.at]

Why 170Mhz? This card is supposed to do up to 2048x1536 at 85Hz with a
clock of 360Mhz

You are using the non-commercial Xorg version of the mga driver that has
a limited feature set. The biggest difference is, that it does not contain the
Matrox mga_hal module that is responsible for proper timings and hardware
acceleration on your card. Additionally, I don't support this drivers in here, so
I'd suggest you to give the unofficial mga drivers (currently v4.4.2) a try.

You can find them in the "Downloads" section in here.
Give them a try and if it still doesn't work, please attach your xorg.conf and
Xorg.0.log files here to your next message.