This version is no longer supported. If this is still reproducible on a
newer/supported version, please reopen.
** Changed in: linux (Ubuntu)
Status: Incomplete => Won't Fix
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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:
Won't Fix
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).
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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
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