I have performed additional troubleshooting and was able to find a workaround.
My configuration is as follows: Ubuntu 13.04 (Raring), 3 way multiseat, Gigabyte GA-990FXA-UD3, 2 x GeForce GTS 450 (also used as audio for seats 1 and 2), 1 x GeForce GT 440 (also used as audio for seat 3), . Config files: http://pastebin.com/u/bastafidli The following kdmrc file causes the issue: http://pastebin.com/qa6uHZ7M due to the following line ServerCmd=/usr/bin/X0 -br -audit 0 -nolisten tcp -layout seat0 -sharevts -novtswitch -isolateDevice PCI:1:0:0 -keeptty The following kdmrc file solves the issue: http://pastebin.com/bxGbHNra by changing the line like this # No -sharevts due to https://bugs.launchpad.net/ubuntu/+source/kde-runtime/+bug/1120077 ServerCmd=/usr/bin/X0 -br -audit 0 -nolisten tcp -layout seat0 -novtswitch -isolateDevice PCI:1:0:0 -keeptty The problem is described here https://wiki.archlinux.org/index.php/Xorg_multiseat#Little_black_boxes.2Fdots_on_the_desktop For me it can be only reproduced if there are 3 seats and it always happens only on the first graphics card (not necessarily first seats). There are the things I have tried when troubleshooting: - I have swapped graphics cards for seat0 and seat 1 in xorg.conf. Seat 0 had second graphics card and Seat 1 had first graphics card. Seat 0 still had artifacts. - I have modified kdmrc and disabled [X-:1-Core] and [X-:2-Core] sections to launch only 1 seat. The problem went away - I have modified kdmrc and disabled [X-:3-Core] section to launch only 2 seats. The problem went away - With 2 seats configured in kdmrc I have tried various combinations of 2 graphics cards for seat 0 and seat 1. The problem went away. The only way for me to reproduce the problem is to have 3 seats running and the seat which uses the first graphics card has "-sharevts" option in kdmrc. ** Summary changed: - Upgrade to 4.10 leads to terminal related artifacts on the desktop + Upgrade to kde 4.10 leads to terminal related artifacts on the desktop -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1120077 Title: Upgrade to kde 4.10 leads to terminal related artifacts on the desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kde-runtime/+bug/1120077/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
