[ILUG] SiS630

[Declan Moriarty]

Was it Dale Dunlea who wrote on Tuesday 05 February 2002 16:17:
> Hi all,
> Does anyone have experience with the SiS630 chipset. According to the
> archives, Padraig's laptop uses it and has had no problems. But my
> machine has a CRT monitor and I am getting terrible refresh rates. I'm
> running SuSE 7.1.
>
> Normally I'd spend half the night googling, downloading and messing with
> it, but I'm currently without net access at home so I was kinda hoping
> for a quick-fix.
>
> Thanks in advance.
> Dale.

I'm running a similarly crippled SiS 6326 video card on one machine, and 
hacked the modelines by hand to get it to play. Here they are. The limitation 
I have is that I have a  17" monitor which tops out at 48 Khz. My 14" will go 
up  to 54khz. The trick is to go as fast (both figures) as you can with it. 
Don't forget to check the  horizontal and vertical frequencies allowable for 
your monitor. Unless you've a big one, most recent monitors have a good 
spread. I have moved up the top horizontal freq. figure on some limited 
monitors (3 khz at a time) until I get a screwy picture; then move it back 
down 3 khz. Likewise with the vertical refresh figure. The X people say it'll 
blow some monitors; it doesn't worry me (I'm in Electronics Hardware Repair), 
but it might worry you.


# 640x480 @ 85 Hz, 43.27 kHz hsync
Modeline "640x480"     36     640  696  752  832   480  481  484  509 -HSync 
-VSync
# 800x600 @ 72 Hz, 48.0 kHz hsync
Modeline "800x600"     50     800  856  976 1040   600  637  643  666 +hsync 
+vsync
# 1024x768 @ 60 Hz, 48.4 kHz hsync
Modeline "1024x768"    65    1024 1032 1176 1344   768  771  777  806 -hsync 
-vsync

If you still have problems, try

startx > xerrors 2>&1

and read xerrors. That will say why the thing is dumping modes. It could be 
something as stupid as not being able to set the dot clock for the particular 
frequency.

-- 
	Regards,


	Declan Moriarty




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