On Sunday 20 March 2005 12:24 pm, Carl E. Hartung wrote:
SiS M650, eh? Here's a great site where you can do some reading:
The main useful thing I got from that site was that it's important to set the parameter MaxXFBMem -- but a glance at XF86Config showed that in fact it was set. I believe you and one other forum member thought that my problem might be due to interference from some other electronic device. I think I've excluded that possibility, both by moving the laptop to another room and by observing that changing the vertical sync frequency (not too many options there) produced a change in the frequency of the dark moving bands. In addition, Windows is unaffected. So I think vertical frequency or refresh rate has something to do with the problem. At the moment I can't even run Sax2 because I'm back in the state where the screen fills with vertical lines. But I haven't tried sax2 -l yet, and that might help a little. Meanwhile I discovered a very useful web page on the very topic I care about: Linux on Dell Inspiron 1000 (www.cdavies.org/inspiron1000.htm). He suggests using X-configure and adding two stanzas to the Monitor section of XF86Config: HorizSync 31.5-48.5 VertRefresh 40-70 I don't know how to get that effect out of Yast or Sax2, however. I don't think this problem is unsolvable, but I have yet to find the solution. The fact that the Windows display is perfectly clean at 1024x768 with 64-bit color (not even an option offered by Sax2!) proves to me that the video chip is capable of doing what's needed. I just have to find out how to tell it how. Paul