Public bug reported:
Since installing Xubuntu 11.10, my computer has become very sluggish,
especially when performing CPU-intensive tasks. I'm guessing this has
something to to with the Kernel's scheduling, since with a twin-core
processor I should have plenty of spare CPU to do things like writing
emails or browsing the Web while something else is going on.
Specifics.
Problems have been observed when performing the following tasks:
* Performing click-removal on a large audio file in Audacity
* Running "dump" to backup filesystems
* Re-encoding .wav files into Ogg Vorbis format using oggenc.
Problems found:
* Audio being played with Audacious stutters
* When typing an email, nothing appears for several seconds; eventually some
typing (though with missing characters presumably due to buffering) appears.
* Firefox doesn't scroll.
Why I believe it's the 3.0.0 kernel:
Rebooting the old (2.6.38-11) kernel stops the problems occurring (so much so
that I'm intending to edit Grub to use that kernel as default).
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-generic 3.0.0.12.14
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tony 1804 F.... xfce4-mixer-plu
tony 1866 F.... pulseaudio
tony 1925 F.... xfce4-volumed
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'NVidia'/'HDA NVidia at 0xfbff8000 irq 22'
Mixer name : 'VIA VT1708S'
Components : 'HDA:11064397,18490397,00100000'
Controls : 30
Simple ctrls : 18
Date: Mon Oct 17 13:28:06 2011
HibernationDevice: RESUME=UUID=23fc2e57-bad4-4be6-9926-0d9e54329591
InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 04e8:6012 Samsung Electronics Co., Ltd
Bus 002 Device 002: ID 1241:1603 Belkin Keyboard
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcEnviron:
LANGUAGE=en_GB:en_US:en
PATH=(custom, user)
LANG=en_GB.UTF-8
LC_MESSAGES=en_GB.UTF-8
SHELL=/bin/ksh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic
root=UUID=e8498562-ee8f-4f88-921e-a897f4bea123 ro nomodeset quiet vga=795
splash=verbose
RelatedPackageVersions:
linux-restricted-modules-2.6.38-11-generic N/A
linux-backports-modules-2.6.38-11-generic N/A
linux-firmware 1.60
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to oneiric on 2011-10-15 (2 days ago)
dmi.bios.date: 03/03/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.50
dmi.board.name: N68C-S UCC
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.50:bd03/03/2011:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68C-SUCC:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug oneiric
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https://bugs.launchpad.net/bugs/876473
Title:
Kernel 3.0.0-12 makes system very sluggish
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