This change was made by a bot. ** Changed in: linux (Ubuntu) Status: New => Confirmed
-- 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/1381612 Title: Hangs with 1 CPU fully utilised after long period of suspend Status in “linux” package in Ubuntu: Confirmed Bug description: Running 14.04 LTS Server in a virtual machine on a 14.04 LTS Desktop host. When the guest suspends for a long period of time the guest server becomes unresponsive in both Virtual Machine Viewer and over SSH, with 100% of one CPU core utilised. A hard reset of the guest is required. The last entry in kern.log on the 14.04 guest seems to be the Clocksource complaint, the entry at 16:40 was the first entry following the hard reset: Oct 14 22:16:18 syncthing kernel: [ 76.145297] random: nonblocking pool is initialized Oct 14 22:23:12 syncthing kernel: [ 489.632956] Clocksource tsc unstable (delta = -2976366996 ns) Oct 15 16:40:11 syncthing kernel: [ 0.000000] Initializing cgroup subsys cpuset This was left overnight, but it's more typical for the machine to be suspended for a few hours, which still causes the problem. I have many other 12.04 LTS Server guests that work just fine regardless of how long they are left suspended so this appears to be a regression. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-37-generic 3.13.0-37.64 ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7 Uname: Linux 3.13.0-37-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-37-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory: 'iw' Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' CurrentDmesg: [ 9.605618] random: nonblocking pool is initialized Date: Wed Oct 15 16:49:06 2014 HibernationDevice: RESUME=/dev/mapper/ubuntu--1404--vg-swap_1 InstallationDate: Installed on 2014-10-13 (1 days ago) InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3) IwConfig: eth0 no wireless extensions. lo no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcFB: 0 cirrusdrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-37-generic root=/dev/mapper/ubuntu--1404--vg-root ro RelatedPackageVersions: linux-restricted-modules-3.13.0-37-generic N/A linux-backports-modules-3.13.0-37-generic N/A linux-firmware 1.127.7 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/01/2011 dmi.bios.vendor: Bochs dmi.bios.version: Bochs dmi.chassis.type: 1 dmi.chassis.vendor: Bochs dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2011:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-trusty:cvnBochs:ct1:cvr: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-trusty dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1381612/+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