Ubuntu
linux package

CPU only uses one of two cores (Intel E6600)

Bug #593427 reported by martin on 2010-06-13

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Expired	Undecided	Unassigned

Bug Description

I have this problem only since i installed Ubuntu 10.04(all previous versions worked). I use a Gigabyte GA-G31MX-S2 motherboard with a Intel E6600 CPU(core2duo). Both CPU cores work on other OS's and using live cd's of previous ubuntu releases. I have Kernel version 2.6.32-21 and 2.6.32-22(both has this problem) I checked ACPI(no options in BIOS but in POST it sais ACPI controller [OK]). Here is some related info from the terminal

martin@martin-desktop:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
stepping : 6
cpu MHz : 2474.594
cache size : 4096 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow
bogomips : 4949.18
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

martin@martin-desktop:~$ hwinfo --cpu
01: None 00.0: 10103 CPU
  [Created at cpu.304]
  Unique ID: rdCR.j8NaKXDZtZ6
  Hardware Class: cpu
  Arch: X86-64
  Vendor: "GenuineIntel"
  Model: 6.15.6 "Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz"
  Features: fpu,vme,de,pse,tsc,msr,pae,mce,cx8,sep,mtrr,pge,mca,cmov,pat,pse36,clflush,dts,acpi,mmx,fxsr,sse,sse2,ss,ht,tm,pbe,syscall,nx,lm,constant_tsc,arch_perfmon,pebs,bts,rep_good,aperfmperf,pni,dtes64,monitor,ds_cpl,vmx,est,tm2,ssse3,cx16,xtpr,pdcm,lahf_lm,tpr_
  Clock: 2475 MHz
  BogoMips: 4949.18
  Cache: 4096 kb
  Units/Processor: 2
  Config Status: cfg=new, avail=yes, need=no, active=unknown
martin@martin-desktop:~$ ^C
martin@martin-desktop:~$ ls -l /sys/devices/system/cpu/
total 0
drwxr-xr-x 4 root root 0 2010-06-13 20:12 cpu0
drwxr-xr-x 2 root root 0 2010-06-13 20:13 cpufreq
drwxr-xr-x 2 root root 0 2010-06-13 20:13 cpuidle
-r--r--r-- 1 root root 4096 2010-06-13 21:17 kernel_max
-r--r--r-- 1 root root 4096 2010-06-13 21:17 offline
-r--r--r-- 1 root root 4096 2010-06-13 21:17 online
drwxr-xr-x 2 root root 0 2010-06-13 21:17 perf_events
-r--r--r-- 1 root root 4096 2010-06-13 21:17 possible
-r--r--r-- 1 root root 4096 2010-06-13 21:17 present
-rw-r--r-- 1 root root 4096 2010-06-13 21:17 sched_mc_power_savings
martin@martin-desktop:~$ uname -a
Linux martin-desktop 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 19:31:57 UTC 2010 x86_64 GNU/Linux
martin@martin-desktop:~$ lsb_release -rd
Description: Ubuntu 10.04 LTS
Release: 10.04
martin@martin-desktop:~$ sudo lspci
[sudo] password for martin:
00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 02)
00:01.0 PCI bridge: Intel Corporation 82G33/G31/P35/P31 Express PCI Express Root Port (rev 02)
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
00:1d.0 USB Controller: Intel Corporation N10/ICH7 Family USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation N10/ICH7 Family SATA IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce 9800 GT] (rev a2)
02:00.0 RAID bus controller: Silicon Image, Inc. SiI 3132 Serial ATA Raid II Controller (rev 01)
03:01.0 SCSI storage controller: Adaptec AHA-2940U/UW/D / AIC-7881U
03:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet (rev 10)

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-generic 2.6.32-22.36
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: martin 1761 F.... pulseaudio
/dev/snd/pcmC0D0p: martin 1761 F...m pulseaudio
/dev/snd/controlC1: martin 1761 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf8000000 irq 10'
   Mixer name : 'Realtek ALC888'
   Components : 'HDA:10ec0888,1458e601,00100001'
   Controls : 40
   Simple ctrls : 22
Card1.Amixer.info:
Card hw:1 'Pro'/'Creative Technology Ltd VF0410 Live! Cam Video IM Pro at usb-0000:00:1d.7-8.1, '
   Mixer name : 'USB Mixer'
   Components : 'USB041e:4063'
   Controls : 2
   Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'Mic',0
   Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
   Capture channels: Mono
   Limits: Capture 0 - 3072
   Mono: Capture 0 [0%] [18.00dB] [on]
CheckboxSubmission: ba8f476ec000274d522533f517786fef
CheckboxSystem: fd6c484c0b5d20a2f1cd036ef0f63975
Date: Sun Jun 13 22:46:42 2010
Frequency: Once a day.
HibernationDevice: RESUME=UUID=905719ae-7948-4c8d-b5a4-ac9c8cdf8acc
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
IwConfig:
lo no wireless extensions.

eth0 no wireless extensions.

ppp0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. G31MX-S2
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=f6153fb1-5966-4cbc-b063-c86ac824ee4f ro quiet splash acpi=off noapic nolapic
ProcEnviron:
LANG=en_ZA.utf8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
RfKill:

SourcePackage: linux
dmi.bios.date: 11/22/2007
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F4
dmi.board.name: G31MX-S2
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF4:bd11/22/2007:svnGigabyteTechnologyCo.,Ltd.:pnG31MX-S2:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnG31MX-S2:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: G31MX-S2
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

Tags:

Revision history for this message

martin (mbooyzen) wrote on 2010-06-13:

AlsaDevices.txt Edit (762 bytes, text/plain; charset="utf-8")
AplayDevices.txt Edit (273 bytes, text/plain; charset="utf-8")
ArecordDevices.txt Edit (510 bytes, text/plain; charset="utf-8")
BootDmesg.txt Edit (36.1 KiB, text/plain; charset="utf-8")
Card0.Amixer.values.txt Edit (4.4 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.2.txt Edit (10.5 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (1.1 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (1.3 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (11.0 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (618 bytes, text/plain; charset="utf-8")
PciMultimedia.txt Edit (611 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (722 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (1.2 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (3.4 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (103.8 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (189.2 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (327.6 KiB, text/plain; charset="utf-8")

Revision history for this message

Jeremy Foshee (jeremyfoshee) wrote on 2010-06-14:

Hi martin,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags:	added: kj-triage
Changed in linux (Ubuntu):
status:	New → Incomplete

Revision history for this message

martin (mbooyzen) wrote on 2010-06-15:

Sorry for this but would this be the on you want me to install?
http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/

Revision history for this message

martin (mbooyzen) wrote on 2010-06-16:

OK, I tried 2.6.34(http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.34-lucid/) and have the same problem..

martin@martin-desktop:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
stepping : 6
cpu MHz : 2400.195
cache size : 4096 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow
bogomips : 4800.39
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

Please let me know if you need more info for that.
I will try 2.6.35.999 in a few minutes and post back.

Revision history for this message

martin (mbooyzen) wrote on 2010-06-16:

And on 2.6.35.999, same problem.

martin@martin-desktop:~$ uname -a
Linux martin-desktop 2.6.35-999-generic #201006151505 SMP Tue Jun 15 14:08:25 UTC 2010 x86_64 GNU/Linux

Again let me know if you need any more info.
As for now should i leave the Needs upstream testing tag?

Revision history for this message

Jeremy Foshee (jeremyfoshee) wrote on 2010-06-22:

Martin,
Are you on the latest BIOS for your motherboard? We have seen some cases where older BIOS create interesting issues.

Thanks!

~JFo

Changed in linux (Ubuntu):
status:	Incomplete → Triaged

Revision history for this message

martin (mbooyzen) wrote on 2010-06-22:

Hi Jeremy,

I have the latest BIOS flash as far as i know (version F4). Can't find a newer one although my current version dates back to 2008.

Revision history for this message

penalvch (penalvch) wrote on 2013-09-29:

martin, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily kernel folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.12-rc2

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

Changed in linux (Ubuntu):
status:	Triaged → Incomplete

Revision history for this message

Launchpad Janitor (janitor) wrote on 2013-11-29:

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

Changed in linux (Ubuntu):
status:	Incomplete → Expired

Report a bug

This report contains Public information

Everyone can see this information.

You are

Subscribing...

Edit bug mail

Other bug subscribers

Bug attachments

Add attachment

Remote bug watches

Bug watches keep track of this bug in other bug trackers.

Ubuntulinux package

CPU only uses one of two cores (Intel E6600)

Bug Description

Other bug subscribers

Bug attachments

Remote bug watches

Ubuntu
linux package