> It may be helpful to attach your /etc/X11/xorg.conf > and /var/log/Xorg.0.log, to assist in troubleshooting. > Also the output of lshw and/or lspci if you have it could > be helpful.
Thanks for your suggestions. Will do next time the problem re-appears. I will also compare the log on a boot that results in the problem with the log on a boot that doesn't reproduce it, just in case. I saw the problem again a few days ago: That time, in addition to what's described above, the bottom 1/5 of the secondary screen was constantly flickering erroneous pixels. Everything came back to normal after restarting X thru a Ctrl-Alt-Bksp sequence. > I wonder if it could be differences or incompatibilities > between the two monitors I don't think so, the two monitors are exactly identical, same brand (Hyundai), same model, bought at the same time, same Xorg parms. I would rather suspect the fact that the Matrox G400 hardware and/or driver doesn't handle the primary and secondary screen exactly the same way. -- Randomly garbled display, secondary screen, dual-head https://launchpad.net/bugs/68968 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
