When it happens, unity is gone, all open windows are without borders and are not "clickable". Only workaround I know is to switch to the console (ctrl-alt-f1), login with my user and start unity again. Then I can switch back (ctrl-alt-f7) and continue working.
Some details: $ uname -a Linux lnz357 3.0.0-15-generic #26-Ubuntu SMP Fri Jan 20 17:23:00 UTC 2012 x86_64 $ lspci 00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02) 00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02) 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) 00:16.2 IDE interface: Intel Corporation 5 Series/3400 Series Chipset PT IDER Controller (rev 06) 00:16.3 Serial controller: Intel Corporation 5 Series/3400 Series Chipset KT Controller (rev 06) 00:19.0 Ethernet controller: Intel Corporation 82578DM Gigabit Network Connection (rev 05) 00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) 00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 05) 00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation 5 Series Chipset LPC Interface Controller (rev 05) 00:1f.2 RAID bus controller: Intel Corporation 82801 SATA RAID Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) 01:00.0 VGA compatible controller: ATI Technologies Inc RV710 [Radeon HD 4550] 3f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02) 3f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02) 3f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02) 3f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02) 3f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02) 3f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/705708 Title: unity crashes when using [alt][tab] To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/705708/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
