Just got another occurrence, and was able to notice a few important details. I had a gnome terminal open, and was unable to click anywhere except in the gnome terminal window. Click-drags in other part of the screen highlighted text in the terminal, so I can confirm that the terminal window seized mouse focus and wouldn't release it. The only way I could recover was to kill the terminal process.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1508267 Title: Mouse randomly fails to click menu bars, launcher, and title bar Status in linux package in Ubuntu: Incomplete Bug description: Periodically, and for no predictable reason, Ubuntu will start to ignore mouse clicks in certain situations. The following seem to fail when the condition is active: clicking title bars. clicking close, maximize, or minimize. mousing into the menu bar at the top of the screen produces no menu bar, and does not respond to clicks the launcher on the left no longer produces information on mouseover, nor does it respond to clicks The following seems to continue to work when the condition is active: clicking in text input fields within applications keyboard I can generally clear the condition by flailing around with alt-enter or by changing to a text console (alt-F1) and back to X. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.19.0-30-generic 3.19.0-30.34~14.04.1 ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6 Uname: Linux 3.19.0-30-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.16 Architecture: amd64 CurrentDesktop: Unity Date: Tue Oct 20 18:13:40 2015 InstallationDate: Installed on 2015-10-19 (1 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) SourcePackage: linux-lts-vivid UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.14.1-0ubuntu3.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: dawn 2257 F...m pulseaudio /dev/snd/controlC0: dawn 2257 F.... pulseaudio /dev/snd/controlC1: dawn 2257 F.... pulseaudio CurrentDmesg: [27114.221018] perf interrupt took too long (2527 > 2500), lowering kernel.perf_event_max_sample_rate to 50000 DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=c420ef2f-b842-4d94-93f0-23a1f6a7a5fe InstallationDate: Installed on 2015-10-19 (1 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: MSI MS-7845 NonfreeKernelModules: nvidia Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-30-generic root=UUID=56c24b4f-bd35-40b2-b967-e0d4dd65563a ro quiet splash ProcVersionSignature: Ubuntu 3.19.0-30.34~14.04.1-generic 3.19.8-ckt6 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.19.0-30-generic N/A linux-backports-modules-3.19.0-30-generic N/A linux-firmware 1.127.15 RfKill: Tags: trusty Uname: Linux 3.19.0-30-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 05/19/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V1.12 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z87-GD65 GAMING (MS-7845) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.12:bd05/19/2015:svnMSI:pnMS-7845:pvr1.0:rvnMSI:rnZ87-GD65GAMING(MS-7845):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.name: MS-7845 dmi.product.version: 1.0 dmi.sys.vendor: MSI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1508267/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp