Thanks for the suggestion. I will be able to try this out by end of Nov 2013.
-- 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/1042612 Title: [Lenovo ThinkPad W520] KVM Guests only use one CPU after host wakes up from sleep Status in “linux” package in Ubuntu: Incomplete Bug description: ThinkPad W520 running U12.04 with the latest updates applied. VT-d enabled in BIOS NVIDIA driver disabled (because it simply doesn't boot with VT-d enabled) KVM Guests of Windows7, RHEL5.3 i) Start KVM Guest and you can see all host CPUs timeslicing and guest is fast and responsive. ii) Shutdown KVM Guest. iii) Place Host laptop into sleep mode. iv) Wake up host and restart KVM Guest v) KVM Guest CPU graph is at 50%, never fluctuates and behaviour is like single-core. All host CPUs are idling except for one at 100%. This is quite reproducable. It is identical in performance and KVM Guest behaviour if you disabled VT-d in the BIOS (but have VT enabled). --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 2.0.1-0ubuntu12 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kvm 2293 F.... pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xf3b20000 irq 54' Mixer name : 'Conexant CX20590' Components : 'HDA:14f1506e,17aa21cf,00100000 HDA:14f12c06,17aa2122,00100000' Controls : 20 Simple ctrls : 10 Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown' Mixer name : 'ThinkPad EC (unknown)' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] DistroRelease: Ubuntu 12.04 HibernationDevice: RESUME=UUID=ef35a2f8-8839-44d5-ac77-fcc3fd10dfa2 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: LENOVO 427638U Package: linux (not installed) ProcEnviron: LANGUAGE=en_CA:en TERM=xterm PATH=(custom, no user) LANG=en_CA.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic root=UUID=6ddbc439-93f6-4c59-a307-902d009a430d ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24 RelatedPackageVersions: linux-restricted-modules-3.2.0-29-generic N/A linux-backports-modules-3.2.0-29-generic N/A linux-firmware 1.79 StagingDrivers: mei Tags: precise running-unity staging Uname: Linux 3.2.0-29-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo dmi.bios.date: 03/02/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 8BET30WW (1.06 ) dmi.board.asset.tag: Not Available dmi.board.name: 427638U dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8BET30WW(1.06):bd03/02/2011:svnLENOVO:pn427638U:pvrThinkPadW520:rvnLENOVO:rn427638U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 427638U dmi.product.version: ThinkPad W520 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1042612/+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
