** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/743907
Title:
Performance degradation after resume
Status in “linux” package in Ubuntu:
Fix Released
Bug description:
Resuming after a suspend results in much degraded system performance
and strange use of processor resources (according to top, htop, system
monitor, and similar).
Suspend works fine. After resume, behavior is sluggish and jumpy.
Looking at top (and similar programs) shows that an apparently random
process is using an entire core. When I kill that process, another
apparently random process takes its place, and occupies 100% use of a
whole core, even when that process apparently shouldn't be doing
anything at all, and doesn't ever use that much processor time during
normal operation. No matter how many processes I kill, there is always
one sucking up a whole core. Processes that have exhibited this
behavior include gnome-panel, chromium-browser, nautilus, gnome-
terminal, bash, Xorg, and others. Again, this consumption of excessive
processor time and whole-system performance degradation happens only
after a resume.
This is a bug that started in kernel version 2.6.32-26, and continues
in 2.6.32-27, 2.6.32-28, 2.6.32-29, and 2.6.32-30. It does NOT occur
in 2.6.32-25, and so I consider it a regression.
This is easily reproducible on my Core 2 Quad notebook running up-to-
date Lucid.
I don't know what's causing this. Please let me know what information
I can collect for you.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-25-generic 2.6.32-25.45
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-25.45-generic 2.6.32.21+drm33.7
Uname: Linux 2.6.32-25-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: eppie 1692 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfc220000 irq 17'
Mixer name : 'Conexant CX20561 (Hermosa)'
Components : 'HDA:14f15051,17aa211d,00100000'
Controls : 14
Simple ctrls : 7
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
7ZHT24WW-1.07'
Mixer name : 'ThinkPad EC 7ZHT24WW-1.07'
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]
Date: Sun Mar 27 23:18:25 2011
HibernationDevice: RESUME=UUID=0157a8b3-c77f-4c15-9b30-44ae99dc1d9a
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: LENOVO 2757CTO
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-25-generic
root=UUID=f86cd16c-e2b3-45a7-9905-8b1b5ac28f69 ro quiet splash
ProcEnviron:
PATH=(custom, user)
LANG=en_US.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.4
SourcePackage: linux
dmi.bios.date: 08/30/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 7ZETB3WW (2.13 )
dmi.board.name: 2757CTO
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:bvr7ZETB3WW(2.13):bd08/30/2010:svnLENOVO:pn2757CTO:pvrThinkPadW700:rvnLENOVO:rn2757CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2757CTO
dmi.product.version: ThinkPad W700
dmi.sys.vendor: LENOVO
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