Hmm, I'm still seeing this with an apparently up to date 14.04. It's an Acer Aspire 1301 which until I installed 14.04 (fresh on SSD) was working fine. What I have noticed is that I can now only use the Nouveau drivers - the Nvidia ones are hopeless - crashes with major rendering issues almost straight away. Again, all was fine prior to 14.04.
The death is infrequent - can use for a couple of days over multiple simultaneous logins, then get a lock when switching users. alt-ctrl-f1 drops me back to a terminal, alt-ctrl-f7 back to the frozen display. So next time it happens, what is the best way of capturing a log? -- 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/1247189 Title: Ubuntu freezes completely when switching user Status in “linux” package in Ubuntu: Fix Released Status in “xserver-xorg-video-intel” package in Ubuntu: Fix Released Bug description: I'm using a freshly installed Ubuntu 13.10. As soon as I click on a different user I want to switch to in the gearbox menu I get a black screen and nothing else is happening. I'm still able to SSH to that box and top does not show any process taking 100% CPU. Alt+sysrq+b is able to reboot the system. I had no problem like this with Ubuntu 13.04 on the same computer. WORKAROUND: Disable the nvidia card in the BIOS. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: lightdm 1.8.2-0ubuntu1 ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 Uname: Linux 3.11.0-12-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 Date: Fri Nov 1 17:40:41 2013 InstallationDate: Installed on 2013-10-30 (2 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MarkForUpload: True SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.12.7-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 2816 F.... pulseaudio CasperVersion: 1.336ubuntu1 CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 IwConfig: eth0 no wireless extensions. lo no wireless extensions. LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140105) MachineType: Acer Aspire 5755G MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb 1 nouveaufb ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid initrd=/casper/initrd.lz quiet splash -- ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4 RelatedPackageVersions: linux-restricted-modules-3.12.0-7-generic N/A linux-backports-modules-3.12.0-7-generic N/A linux-firmware 1.119 Tags: trusty Uname: Linux 3.12.0-7-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 08/09/2012 dmi.bios.vendor: Acer dmi.bios.version: V1.21 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: JV51_HR dmi.board.vendor: Acer dmi.board.version: Base Board Version dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.21 dmi.modalias: dmi:bvnAcer:bvrV1.21:bd08/09/2012:svnAcer:pnAspire5755G:pvrV1.21:rvnAcer:rnJV51_HR:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.21: dmi.product.name: Aspire 5755G dmi.product.version: V1.21 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1247189/+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
