Bug#175911: 1024x768 works fine, 1280x1024 doesn't.

[Stuart Lamble <Stuart.Lamble@its.monash.edu.au>]

retitle 175911 xserver-xfree86: [mga] wrong modeline being sent to monitor on MGA G550 AGP rev 1 at 1280x1024 resolution
thanks

As a FYI -- yesterday, I dropped the resolution of my display to
1024x768 (the monitor isn't of high enough quality; I was getting too
much eyestrain at 1280x1024). An email from somebody who was perusing
the bug lists prompted me to try loading the X server without mga_hal
available; the display came up correctly (and the sync rates appear to
match reasonably closely -- the driver is claiming:

(**) MGA(0): Default mode "1024x768": 94.5 MHz, 68.7 kHz, 85.0 Hz

and the monitor is coming up with 68.5 kHz, 84.9 Hz.

So it looks like the bug is being tickled only at 1280x1024 (and
possibly higher?) resolutions. The email I mentioned indicated that that
individual had no problems with 1280x960, but I haven't tried that
myself -- 1024x768 is working fine for me.

"Curiouser and curiouser."