With 3.5.0-22.34 kernel (with fglrx), there is another way to reproduce this. On the menu on the right top, choose "logout", the monitor goes blank and the lightdm login screen does not show.
>From `top` can see the Xorg process occupies 100% CPU. >From the Xorg.0.log the last lines are: [ 35.682] (II) fglrx(0): Shutdown CMMQS [ 35.682] (II) fglrx(0): [uki] removed 1 reserved context for kernel [ 35.682] (II) fglrx(0): [uki] unmapping 8192 bytes of SAREA 0x2000 at 0x7f981aec6000 ** Attachment added: "Xorg.0.log" https://bugs.launchpad.net/ubuntu/+source/xorg-server-lts-quantal/+bug/1105171/+attachment/3508521/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1105171 Title: X.Org is stuck in a loop on resume from S3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server-lts-quantal/+bug/1105171/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
