Thank you for helping. I have upgraded BIOS to F13 although it should only improve USB3.0 compatibilty. Lets wait for about a month for the problem to appear.
$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date F13 03/21/2012 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1265065 Title: Desktop freeze while drag-maximizing window Status in “xorg” package in Ubuntu: Incomplete Bug description: It has happened today twice at 22:23 and 22:54. I laft click with mouse on firefox titlebar and try to drag it up against "taskbar" to make FF windo to maximize. I see this shadow/animation of window about to extend its borders and desktop freezes. I do not remember if mouse still moves. I go to another console Ctrl+Alt+1, log in, and execute "pkill -U username" that brings me back to logon screen. Ubuntu 13.10 64-bit ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: xorg 1:7.7+1ubuntu6 ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true Date: Mon Dec 30 22:32:14 2013 DistUpgraded: Fresh install DistroCodename: saucy DistroVariant: ubuntu ExtraDebuggingInterest: Yes GpuHangFrequency: Once a week GpuHangReproducibility: Occurs more often under certain circumstances GpuHangStarted: I don't know GraphicsCard: NVIDIA Corporation GF104 [GeForce GTX 460] [10de:0e22] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Gigabyte Technology Co., Ltd Device [1458:350c] InstallationDate: Installed on 2013-11-30 (30 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: Gigabyte Technology Co., Ltd. Z68X-UD3-B3 MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=9ee8cef8-09ae-4ab5-8422-7392354e9e26 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/15/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F1 dmi.board.name: Z68X-UD3-B3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd04/15/2011:svnGigabyteTechnologyCo.,Ltd.:pnZ68X-UD3-B3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnZ68X-UD3-B3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: Z68X-UD3-B3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.46-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1 xserver.bootTime: Mon Dec 30 11:53:22 2013 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input Logitech USB-PS/2 Optical Mouse MOUSE, id 8 input AT Translated Set 2 keyboard KEYBOARD, id 9 input WC060 Series HD Webcam KEYBOARD, id 10 xserver.errors: Failed to load module "nvidia" (module does not exist, 0) Failed to load module "nvidia" (module does not exist, 0) xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.14.5-1ubuntu2~saucy1 xserver.video_driver: nouveau To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1265065/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp