Public bug reported:
I have very bad performance with my Core i7 Sandy Bridge CPU, especially
when multitasking. Windows will hang frequently, and games are pretty
much unplayable.
I have attached a report generated by Hardware Info, containing some
benchmarks, and the model of the CPU in question. This also happens in
Natty.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: seph 1727 F.... pulseaudio
seph 2081 F.... steam.exe
/dev/snd/controlC1: seph 1727 F.... pulseaudio
/dev/snd/pcmC1D0p: seph 1727 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf7d00000 irq 49'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0269,104d5300,00100004
HDA:80862805,104d5300,00100000'
Controls : 16
Simple ctrls : 8
Card1.Amixer.info:
Card hw:1 'Headset'/'Logitech Logitech G930 Headset at usb-0000:00:1d.0-1.3,
full speed'
Mixer name : 'USB Mixer'
Components : 'USB046d:0a1f'
Controls : 4
Simple ctrls : 2
Date: Sun May 1 12:03:35 2011
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=62c8caa9-2c6a-4a0c-88e7-4fc6ee2f40c7
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
MachineType: Sony Corporation VPCCB1AFJ
ProcEnviron:
LANGUAGE=en_US:en
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic
root=UUID=8463b5ba-9e9a-4374-b21e-609344176f50 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-2.6.38-8-generic N/A
linux-backports-modules-2.6.38-8-generic N/A
linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/17/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: R0230V2
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrR0230V2:bd02/17/2011:svnSonyCorporation:pnVPCCB1AFJ:pvrJ004HQRP:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VPCCB1AFJ
dmi.product.version: J004HQRP
dmi.sys.vendor: Sony Corporation
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug oneiric running-unity unity-2d
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https://bugs.launchpad.net/bugs/774605
Title:
Bad performance with Sandy Bridge CPU
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