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- From: tym@dibbler.cs.monash.edu.au (Tim MacKenzie)
- Newsgroups: comp.os.linux
- Subject: Re: Help with Sigma Legend and X11
- Message-ID: <1992Nov6.012955.15572@monu6.cc.monash.edu.au>
- Date: 6 Nov 92 01:29:55 GMT
- References: <koch.720810294@navy22>
- Sender: news@monu6.cc.monash.edu.au (Usenet system)
- Organization: Computer Science, Monash University, Australia
- Lines: 46
- X-Newsreader: TIN [version 1.1 PL6]
-
- Clifton Koch (koch@rtsg.mot.com) wrote:
- > I have a Sigma Legend SVGA card in my machine, and can't seem to get the
- >1024x768 mode working. 800x600 works (but only at 60 Hz). This card can do
- >1024x768x60Hz and 800x600x72Hz under DOS, but I can't seem to access any of
- >the dot clocks for these modes. For the 1024x768, there should be a 65MHz
- >dot clock. CLOCK.EXE under DOS reports 40MHz as the fastest clock. The
- >tutorial on X11 dotclocks even uses the Legend as the example for calculating
- >the Xconfig parameters, but using the same entries, X can't find the appropriate
- >clocks on startup. The Legend is a Tseng 4000 based card, BTW.
-
- I have a ET4000 based card, it generates all clocks from a single crystal.
- CLOCK.EXE did not give any sensible results for the clock values, and gave
- different results depending on which video mode you were in at the time of
- running.
-
- My solution was to get Xfree86 to find the clocks itself: (you need 1.2 for
- this I think). Comment out any Clocks: line in your XConfig and startx in
- a resolution that works (like 600x400). Output stderror to a file so that you
- don't need to type in the clocks yourself... "startx 2> /tmp/whatever".
- Sometimes all the clocks wont be found, so you might have to startx a few
- times. You don't seem to need a Clocks: line, but if you put it in yourself
- then you wont have problems later with clocks not being found (once you've
- found out what the actual clocks values are).
-
- Get the xclk program from tsx-11 (it's in sources/usr.bin.X11 I think). This
- will do the calculations for you for the ModeDB. I found it really useful
- for getting base values which can then be fiddled for your monitor.
-
- > Has anyone had any luck with the Legend and higher resolutions?
-
- With my ET4000 card (I'm not sure of the exact manufacturer, it calls itself
- a "Enhanced VGA Bios 2148s 5/30/92". I'm using a MAG 15" monitor and the
- following ModeDB uses all the "usable" area on the monitor in the center
- clicks of all the controls.
- "1168x897" 80 1168 1200 1352 1456 897 897 908 918
-
- This leaves a HUGE 880 bytes on my 1M card unused (256 color mode), and looks
- rather nice (impressive too!).
- > If so, what does your Xconfig look like?
- > Did you have to do anything special to get X to recognize the dotclock?
- See above.
-
- ObConfig: 486/33 165M 4M, 15M swap, Local bus video,
- 0.98pl3 (no scsi, procfs, extfs)
- --
- -Tim MacKenzie (tym@dibbler.cs.monash.edu.au)
-