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Newsgroups: comp.unix.bsd Path: sserve!manuel.anu.edu.au!munnari.oz.au!hp9000.csc.cuhk.hk!saimiri.primate.wisc.edu!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!ira.uka.de!rz.uni-karlsruhe.de!stepsun.uni-kl.de!sun.rhrk.uni-kl.de!sun.rhrk.uni-kl.de!andrick From: andrick@sun.rhrk.uni-kl.de (Ulf Andrick [Biologie]) Subject: [XFree86] Problems with tvga9000 Message-ID: <1992Nov13.144752.21612@rhrk.uni-kl.de> Sender: news@rhrk.uni-kl.de Organization: University of Kaiserslautern, Germany X-Newsreader: Tin 1.1 PL4 Date: Fri, 13 Nov 1992 14:47:52 GMT Lines: 54 I have a Trident tvga9000 card with 512 k RAM and some noname 14" monitor with 35.5 kHz max. hor. scan freq.. This hardware allows me to use 800x600 256-colour graphics under DOS. The monitors data sheet gave some timings, from which I calculted the dot clocks for Xconfig and I got exactly the VESA values as supplied by Th. Roell. In fact, the mono server ran with Xconfig.idiot without any modification. It also tolerated setting the chipset to tvga8900 and giving the clocks 25 28 45 36 as mentioned in README.trident. xclock.exe also reports these values. (What I want to use is 36 MHz.) The colour server refused to run with Xconfig.idiot. I changed chipset and clocks and commented the pseudo-800x600 modes out of Xconfig and then the server run, and the timings appeared to be correct, but only that one line output by the video card was spread over two lines on the screen. Apparently, the graphics card produces a clock frequency which is only half of that required. I also tried to comment chipset and/or clocks out and let the server "autodetect". But either the server exits without doing anything or it tries some clocks and exits then. I also used the tvgactrc-utility under DOS. It shows me that there is an optional 72 MHz clock available, and in fact, when I used it, it displayed the corrrect hor. scan freq. and produced a correct result, while 36 gave strange values. I don't understand that. Maybe, there is something wrong with the hardware. But the software seems to be wrong as well then. And then: why does the mono server work and the colour server not? Why does the card work under DOS? I wasn't able to produce a better output by shifting the 36 around in my clocks entry. Here is (from memory) what I use in Xconfig: vga256 chipset "tvga8900" clocks 25 28 45 36 ..... videoram 512 modes "800x600" "640x480" viewport 0 0 nd the VESA dot clocks for 800x600 36 MHz. Any help? Any other experiences with the mentioned graphics adaptor? Is tvga9000 not compatible to tvga8900C? -- Ulf R. Andrick andrick@rhrk.uni-kl.de FB Biologie - Tierphysiologie Universitaet Was du nicht selber weiszt, D-W 6750 Kaiserslautern das muszt du dir erklaeren (Tegtmeier)