I had this screen shifting problem on my multiseat system. I know very little of the internal things inside Xorg an GDM, but I managed to circumvent screen shifting with the following configuration in /etc/gdm/gdm.cont.
In [servers] section: 0=Standard device=/dev/console 1=Ilkka [server-Ilkka] name=Standard server command=/usr/X11R6/bin/X -layout LayoutIlkka -br -audit 0 -nolisten tcp -sharevts -isolateDevice PCI:3:0:0 vt8 flexible=true handled=true *** Previously I had server section for my primary and secondary graphics card. Then shifting appeared. I configured X to start server 0 by default and I set up a server section in /etc/gdm/gdm.conf only for the second seat. Now the screen shifting has completely disappeared and both seats work nicely. I verified it doesn't mess console by running screendump 1 to see that no characters are written to console. Now even switching to virtual terminals (ctrl+alt+f1..f6) doesn't mess the screen like before. DO NOT USE no-scroll in kernel boot parameter for this because it just makes the problem harder to see and fix. The console at tty1 still works even if it doesn't scroll, so you can mess your computer badly if you type rm -rf * in a text editor in X because it is going to be executed in tty1 shell, too! -- (Multiseat) screen shifts when /dev/console written to https://bugs.launchpad.net/bugs/153425 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
