Sitsofe, I experience this problem in Oneiric:
cat /proc/version Linux version 3.0.0-19-generic (buildd@vernadsky) (gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) ) #33-Ubuntu SMP Thu Apr 19 19:05:57 UTC 2012 dpkg -l | grep xserver-xorg\ ii xserver-xorg 1:7.6+7ubuntu7.1 X.Org X server dpkg -l | grep intel ii libdrm-intel1 2.4.26-1ubuntu1 Userspace interface to intel-specific kernel DRM services -- runtime ii xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1 X.Org X server -- Intel i8xx, i9xx display driver lspci -nn | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation 82945G/GZ Integrated Graphics Controller [8086:2772] (rev 02) cat /proc/version I can easily reproduce the problem instantly after boot when running bonnie++ benchmarks while switching between multiple X servers via Ctrl/Alt F7-F12, given the following lightdm config (I am logged into one session and the other sessions just show the greeter): cat /etc/lightdm/lightdm.conf [LightDM] greeter-user=lightdm seats=Seat:0 Seat:1 Seat:2 Seat:3 [SeatDefaults] allow-guest=false greeter-hide-users=true greeter-session=lightdm-gtk-greeter user-session=xubuntu [Seat:0] user-session=xubuntu autologin-user= [Seat:1] user-session=xubuntu autologin-user= [Seat:2] user-session=xubuntu autologin-user= [Seat:3] user-session=xubuntu autologin-user= [Seat:4] user-session=xubuntu autologin-user= [Seat:5] user-session=xubuntu autologin-user= [XDMCPServer] enabled=true In case I swapoff -a before starting the test, then the problem seems to be gone though. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/820881 Title: [i945] Heavy screen and font corruption when free memory is low on GMA950 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/820881/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp