From: dclemans@news.wv.mentorg.com (Dave Clemans) Subject: Re: 1024x768 => Cirrus 5422 freaks out Date: 27 Sep 1993 16:11:51 GMT
Jesper Honig Spring (spring@diku.dk) wrote:
: When configuring X for 1024x768 on my CL GD5422 the
: VGA-card freaks out in the sence that everything is
: unreadable. I haven't got the same problems in 800x
: 600.
: Can anyone help me?
Is the display you are seeing vertically stable, but looks like it has
three or so tiny copies of the screen horizontally? That's what I'm
getting on an IBM PS/1 with a CLGD5426. And again 800x600 words fine
for me. And 1024x768 definitely works fine in Windows.
I'm beginning to wonder if the XFree86 cirrus driver is really complete.
That is, if it needs to set some of the chip mode registers slightly
differently than it does now; possibly a horizontal clock divisor???
I've been trying to figure out how Windows gets 1024x768 out of the
same hardware, and I did find something that looks interesting, but
I may be reading too much into it. In the system.ini file, there's
a section at the bottom labeled "CLVGA". For 1024x768, there are
lines "Mode=96" and "Dots Per Inch=120". (or something like that).
For smaller resolutions, there's something like "Mode=95" and
"Dots Per Inch=96".
dgc