ok, searching launchpad and googling a lot, I found this bug is an effect caused by bug: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/438000 also reported into bug on freedesktop.org: http://bugs.freedesktop.org/show_bug.cgi?id=22076
As you can see the real problem is a bug/limitation on mesa-lib, you can avoid it by putting your external Monitor (VGA1) "below" your current screen (LDVS1), NOTE: You've always "2048x2048 maximum 3D texture size" limitation so check if your vertical size will not overcome 2048, example: In my case vertical size is: 640 + 1024 = 1664 that doesn't overcome 2048 :-) I've tested it and now it works great with compiz too, this an example script that you can use to switch correctly on (without freeze) your external monitor: #!/bin/bash lvdsres="1024x600" vgares="1280x1024" if [ -e ~/.vgaconnected ] then xrandr --output VGA1 --off --output LVDS1 --mode $lvdsres && rm ~/.vgaconnected else xrandr --output LVDS1 --mode $lvdsres --output VGA1 --mode $vgares --rate 60 --below LVDS1 &> ~/.xrand.log && touch ~/.vgaconnected fi Let me know if this solution solved your problems too! bye. ** Bug watch added: freedesktop.org Bugzilla #22076 https://bugs.freedesktop.org/show_bug.cgi?id=22076 -- karmic gnome-display-properties hangs for external monitor mode 1280x1024 https://bugs.launchpad.net/bugs/445100 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
