[ubuntu-za] Kubuntu810-screen probs-SiS chipset

Hannes Coetzee scorpking at scorpking.za.org
Tue Jan 27 19:47:02 GMT 2009

Hi Alan

The screen will flicker when it's using the wrong the refresh rate. Use 
a modeline generator and see if you can force it to use the correct 
refresh rates.
These might help:

I've also got this in my notes -
"To get desired /etc/X11/xorg.conf one can modify the /usr/bin/dexconf. 
This script generates xorg.conf automatically in liveCD session 
according to the booted machine."

Hope you get it fixed.


> Hi All
> Problem: Screen flickers; when entering in terminal/konsole it actually 
> flashes off and on.
> Motherboard: Asus P5SD2-VM. Chipset: SiS 672 + SiS 968. VGA: SiS Mirage 3+ 
> Intergrated graphics. Screen: L&G 17 inch CRT1280x1024 at 60Hz -max; 
> 1024x768 at 85Hz -recommended
> Kernal: Linux 2.6.27-7-amd64 and Linux 2.6.27-9-amd64 upgrade.
> When kubuntu810 first loaded - before switching off - screen flickered; on 
> restarting, screen blanked out when system was loading following password 
> entry.
> Kubuntu810 disk reloaded - in system settings programme found display set at 
> 1280x1024-auto refresh. Reset this to 1024x768-auto refresh (cannot manually 
> set to 85Hz, it defaults to auto) and screen now only flickers on restart but 
> when I enter in terminal/konsole  the screen actually flashes off and on as I 
> enter from keyboard. Kernal upgrade (via AptonCd) has not been done with new 
> screen settings. (Problem pc is my son's, my pc is working fine so I can 
> access internet and system with no problems).
> Have searched ubuntu forum but cannot find discussion paper on this specific 
> screen problem. Have searched file system but cannot see where I can manually 
> set refresh rate. Can you help with this problem; what is my next move?
> Regards
> Alan Smith

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