On Wed, Dec 19, 2001 at 02:16:15PM -0800, Earl Hood wrote: > After my investigation, it appears that the glint driver imposes > a maximum pixel clock rate of 110, regardless of the specified > display depth. The only way I could get the glint driver to run > in 1280x1024 @ 75Hz was to set the DacSpeed configuration direction > in my XF86Config file. I faked the 32 depth speed since it appears > the driver is always using that as the maximum instead of the > 24 depth speed. Hence I have the following in my config: > No, your confusing depth and bitsperpixel.
> Section "Device" > Identifier "3Dlabs Permedia2 (generic)" > Driver "glint" > VideoRam 8192 > #Chipset "pm2" > #Option "no_accel" > # Insert Clocks lines here if appropriate > > #XXX: Should be first line, but it appears glint driver takes the > # 32 depth as ultimate limit preventing 1280x1024 @ 75 Hz > # display mode. So we fake the 32 depth limit to get desired > # display. > #DacSpeed 230 230 150 110 > DacSpeed 230 230 150 135 > EndSection > DacSpeed is used by specifying the dacspeed at 8bpp, 16bpp, 24bpp and 32bpp. If you start the server with -depth 24, then by default you get 32bpp. If you start the server with -depth 24 -pixmap24 then you get 24bpp. > Also, under my monitor section I have: > > # 1280x1024 @ 75Hz > Modeline "1280x1024" 135 1280 1296 1440 1688 > 1024 1025 1028 1066 -HSync -VSync > > SIDE NOTE: The default modeline settings provided for a Sony 420GS > appear to be useless (for my case). > The closest to my needs was 1280x1024 @ 76Hz. > Why isn't there a setting for 1280x1024 @ 75Hz? Related > to this, is the difficulting in defining a modeline since no > monitor manual I ever owned gives all the hysnc, vsync, et. al. > specs. I found a VESA calculator on the net to get the above listing. > (I do know the 420GS can handle the modelines provided by default, > but there was no modeline for 1280x1024@75Hz, which seems to be > a common mode for video cards and a mode I know my video card can > handle). > Remove the ModeLine, and the server uses it's built in modes that has a 75Hz refresh rate. > So, now I have 1280x1024@75Hz, however, I get "static" on the display > anytime I move windows around or when other "movement" effects > occur on the display. Is this a known problem with the glint > driver? > Correct. You are overriding the DacSpeed to be more than the limit imposed by the server and thus getting static. This limit exists as that is the limit of the Permedia2. Some boards can beat this limit because of a slightly higher memory clock. > Historically, I used to have RH 5.2 on my system running > Accelerated X (and yes, I purchased it) since at the time of installation > it had a working driver for my card. The server had no problems > running 1280x1024 @ 75Hz display mode. > I've noticed that it usually reprograms the memory clock on the board to a slightly higher rate that enables the PM2 board to use 75Hz refresh. We don't do that in the glint driver due to the wealth of PM2 boards out there. It's possible to add the feature though, but it could damage your boards in the longer term - another reason why I haven't done it. A side question - what BIOS version is your Diamond FireGL 1000 Pro ? I think the last one was 1.54 which actually did the right thing for the memory clock. I'd check that out first. Alan. _______________________________________________ Newbie mailing list [EMAIL PROTECTED] *** To unsubscribe , or change message options, see: http://XFree86.Org/mailman/listinfo/newbie
