Public bug reported:
I have a lenovo y460p laptop with core i7 2630QM and 8 GB ram. Sometimes
ubuntu recognizes the cpu with only one core. This results in extreme
heating. Restart does not always fixes the issue. Normally, as the
processor has 8 threads, 2 threads per core, 8 cores are recognized by
Ubuntu.
Plus switchable graphics do not work, even though the processor has
graphics processor.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-10-generic 2.6.38-10.46
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC272 Analog [ALC272 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: vipul 4967 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf8800000 irq 43'
Mixer name : 'Realtek ALC272'
Components : 'HDA:10ec0272,17aa400c,00100001'
Controls : 21
Simple ctrls : 11
Card1.Amixer.info:
Card hw:1 'Generic'/'HD-Audio Generic at 0xcfedc000 irq 44'
Mixer name : 'ATI R6xx HDMI'
Components : 'HDA:1002aa01,00aa0100,00100200'
Controls : 4
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Sun Aug 7 05:55:31 2011
HibernationDevice: RESUME=UUID=c3f0d8cf-2028-43e0-a776-b9094b5bd9f3
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: LENOVO IdeaPad Y460p
ProcEnviron:
LANGUAGE=en_US:en
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic
root=UUID=67c6125d-c629-4cc6-8399-d017cbff8a48 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-2.6.38-10-generic N/A
linux-backports-modules-2.6.38-10-generic N/A
linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/11/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 3FCN19WW
dmi.board.name: KL2
dmi.board.vendor: LENOVO
dmi.board.version: Rev 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Rev 1.0
dmi.modalias:
dmi:bvnLENOVO:bvr3FCN19WW:bd02/11/2011:svnLENOVO:pnIdeaPadY460p:pvrRev1.0:rvnLENOVO:rnKL2:rvrRev1.0:cvnLENOVO:ct10:cvrRev1.0:
dmi.product.name: IdeaPad Y460p
dmi.product.version: Rev 1.0
dmi.sys.vendor: LENOVO
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug natty running-unity
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https://bugs.launchpad.net/bugs/822223
Title:
Core i7 2630QM sometimes recognized with only one core. Plus no
graphics core use or switching.
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