X server and resolution

[Jason]

Hawke wrote:
> 
> He's got kinda the opposite problem from me. I can get mine to work
> in all modes up to 800x600. However, any attempt to step up to
> 1024x768 crashes the video completely (black screen) and will not restore
> on terminale prompt.
> 
> The vid card I am using is a permedia II based Creative labs Graphics Blaster
> extreeme professional (8 megs onboard ram) Unfortunatelly, creative labs
> still won't support that card in linux (or any of their other products for that matter)
> and they have told me that internal specs on the cards CPU is NOT publically
> available. I really wish I had the cash for a better card......

First, check out the device section, and specify some options to
disable all acceleration...

Section "Device"
#	VideoRam	8192
#	VideoRam	4096
#	VideoRam	2048
	VideoRam	1024		#Try any of these to lower the amount of videoram X
uses also...
	Option		"noaccel"	#might help?
EndSection

If that fails...

Eliminate the Modeline for interlaced 1024x768 (pound it out) and see
what happens. Sometimes this helps.

Next..

Try the following modelines as substitutes for your 1024x768 mode. The
purpose of this test is to see if your hitting a "memory barrier" at
1024x768 that causes the card to act differently, then crash.

# 1024x768 @ 60 Hz, 48.4 kHz hsync
Modeline "1024x768"   65      1020 1032 1176 1344      768  771  777 
806 -hsync -vsync

and/or

# 1024x768 @ 60 Hz, 48.4 kHz hsync
Modeline "1024x768"   65      1024 1032 1176 1344      764  771  777 
806 -hsync -vsync

if neither work, try:

# 1024x768 @ 60 Hz, 48.4 kHz hsync
Modeline "1024x768"   65      1020 1032 1176 1344      764  771  777 
806 -hsync -vsync


you might also try playing with the options that involve the video
memory settings (frame buffer, etc)


> Jason wrote:
> 
> > John W wrote:
> > > The setting is just not available.Distros like Mandrake or Red Hat
> > > during test the screen just blinked and never displayed an image. I
> > > have 640x480 and 1024x768 the latter is just too small and vice versa.
> >
> > What Modeline in /etc/XF86Config is currently associated with the
> > 1024x768 mode that you are using? If you can find that modeline and
> > post it to the list, I should be able to make a working modeline for
> > 800x600 from it that will be compatible with your monitor.
> >
> > What is your monitors horizontal & vertical scan bandwidth?
> >
> > The info I am looking for looks something like this (and is in
> > /etc/XF86Config)
> >
> > (yes, a plain S3V card and a Princeton monitor sold as a 1200x1024 max
> > can do a reasonable 1600x1200! 55Hz is a little on the blinky side
> > though.)
> >
> 
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