On Fri, 28 Jun 2002, Scott Long wrote: > I'm trying to set up dualhead with a Matrox G550 and have been > experiencing some problems.
I have a PIII-800 running Red Hat 6.2 + current CVS XFree86 with a G550 driving an SGI 1600SW with MLA on the DVI port and an iiyama ProLite 38e on the VGA port. My config file is available at http://www.dpmms.cam.ac.uk/~werdna/xfree86-devel/XF86Config-4.20020629 There is a lot of old stuff in there as I do a lot of fiddling, and like to keep the other setups in the file, but this is my real config file. I use "startx -- -layout G550-2fp". > First problem: the screen occasionally blanks to black for a moment, > then comes back. It's not going to standby, the panel stays lit but > goes to black. Does not happen in VGA text modes, so maybe this is a > driver problem? I've seen that very occasionally, just a couple of times a week. > I also can't get dualhead working, although I've read several success > stories.. I installed mgapdesk and used that to enable the second > screen (CRT). Immediately after doing this I quit X, and the CRT came > on as a clone of the digital panel. However after restarting X both > screens seemed to go into standby and would not come back > (ctrl-alt-bkspc to no avail, had to hard reboot). The only way to get > back into X was to disable the second screen (CRT) again. > > Another clue (maybe): I have to use Option "NoHal" with the Matrox > driver, otherwise the panel goes into standby (like in the dualhead > case) and never comes back. Using "NoHal" on both drivers in an > attempt to get dualhead working also failed. It only works for the > single screen... I found that I had to use the HAL (md5sum b6c18c9cb540900cfa474e27d6571848, I think this is the vertsion which comes with the Matrox drivers for 4.2.0) to get the DVI output working at all, but I can and do use the XFree86 driver, not the the Matrox one. This is Linux 2.2.x with bleeding edge X server, so I don't even attempt DRI (DRI has required a 2.4 kernel since about XFree86 v4.1). -- Dr. Andrew C. Aitchison Computer Officer, DPMMS, Cambridge [EMAIL PROTECTED] http://www.dpmms.cam.ac.uk/~werdna _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
