2011/8/15 gene heskett <ghesk...@wdtv.com>: > On Monday, August 15, 2011 06:07:09 PM Alex Deucher did opine: > >> 2011/8/15 gene heskett <ghesk...@wdtv.com>: >> > On Monday, August 15, 2011 04:20:49 PM Mark Wagner did opine: >> >> On Sat, Aug 13, 2011 at 05:50, gene heskett <ghesk...@wdtv.com> wrote: >> >> > Greetings all; >> >> > >> >> > One of the problems that was confusing me recently is that I had >> >> > replaced the old samsung crt monitor with a much newer cheap AOC >> >> > lcd that runs at 1360x724 at best, but under the vesa driver on an >> >> > ati x1650 video card, it apparently is running in 1024x768. آ This >> >> > results in a pixel that is far from square unless I use a button >> >> > on the monitor which shrinks the display sideways, leaving 2" wide >> >> > black stripes on the sides. >> >> > >> >> > From Xorg.0.log: >> >> > >> >> > (II) VESA(0): SAMSUNG: Using hsync range of 30.00-81.00 kHz >> >> > (II) VESA(0): SAMSUNG: Using vrefresh range of 55.00-75.00 Hz >> >> > (II) VESA(0): SAMSUNG: Using maximum pixel clock of 90.00 MHz >> >> > (II) VESA(0): Not using mode "1360x768" (no mode of this name) >> >> > <---native >> >> >> >> Looks to me like the server is telling you it doesn't know how to >> >> generate a resolution of 1360x768. If this was a CRT, I'd say to >> >> provide a custom modeline in the xorg.conf file. Since you've got a >> >> LCD, I don't know if this is the correct solution or not. >> > >> > None of my machines have an xorg.conf with a sample modeline for that. >> > >> > Could someone post an example I could try please? >> > >> > Or even better, are there docs someplace that would describe how to do >> > that? I just looked at the modeline description in a man xorg.conf, >> > and that lacks the specifics I'd need to make a quasi-intelligent >> > first guess. >> >> The problem with vesa is that you are limited to standard vesa modes >> that are implemented in the vbios. You cannot define arbitrary modes. >> For that you need to use a real driver specific to your video chip. >> >> Alex > > I was afraid of that Alex. And I tried some Modelines suggested on the EMC > mailing list & got thrown under the bus just as it was leaving. This > application that must run, is a realtime application with a base loop of > its i/o running every 20-40 u-secs. _NO_ "real" driver allows that, > wrecking carving of parts in wholesale numbers because the IRQ's that drive > this apps base thread can be locked out by the "real" driver for intervals > in excess of 100 milliseconds. The 'vesa' driver is the only driver that > allows the base thread to keep some semblance of a steady beat. > > This particular card is an ATI X1650. Does it perchance have an available > vesa bios update that would add some of the 16x9 modes like this?
Not likely. I don't think vesa ever officially added any 16:9 modes as standard vesa modes. Have you tried turning off acceleration? Add: Option "NoAccel" "True" in the device section of your xorg.conf. That should significantly reduce the number of irqs generated. Alex _______________________________________________ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com