Hi everyone. I just updated my packages via up2date. Among the updates were XFree86 packages (I'll give a full list at the bottom). Somehow the update caused the following two strange behaviours: 1. Primary and secondary monitors swapped over 2. Secondary monitor no longer comes out of standby after powerup The first problem was easy to solve: swap the monitor cables over on the card. :-) The second one was a lot harder, since as far as the software was concerned, nothing was wrong. Xinerama was working, I had a desktop spanning both monitors, and I could still log in and do things, I just couldn't see what was on my secondary monitor (previously on the right, now on the left). The monitor itself wouldn't come out of standby mode. At first, I thought I might have killed the monitor, but swapping monitors caused the other monitor to stay in standby. I also thought I might have killed the secondary connector on the card, but I eventualy found a workaround that showed everything in the hardware was OK, it's just that the update did something strange. After giving up and deciding that Xinerama wasn't going to work any more, I switched back to two desktops (turned Xinerama off, but kept dual-head config). That also failed to bring the secondary out of standby. I resigned myself to single-monitor until I could fix the card, so I turned off dual-head mode. Suddenly, the secondary monitor came to life, and was displaying a clone of the primary monitor! I switched back into dual-head mode, and the monitor stayed on. So, my workaround is this: * Turn on machine * Switch to single-monitor mode * Restart X * Switch back to dual-head mode * Restart X That's it! Everything will be fine from then on until the next reboot or poweroff. I figured this is probably an XFree86 bug, so I searched XFree86's Bugzilla and found this: http://bugs.xfree86.org/show_bug.cgi?id=443 I posted a couple of amendments, but they suggested I either post another separate bug (since I have a Matrox G550, not an ATI Radeon IGP 320M), or check with RedHat, since it was after a RedHat update that the problem occurred. So, I thought I'd first post here to see if anyone else has had this problem, either with a Matrox G550 or with any other dual-head setup. Based on the symptoms, it seems that the secondary monitor is not being correctly initialised when dual-head is turned on. I figure this since switching to single-monitor turns on the secondary monitor and switching back to dual-head doesn't turn it back off. Comments, anyone? Similar problems or experiences? Regards, Msquared... -- Shrike-list mailing list Shrike-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/shrike-list
