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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/593427 Title: CPU only uses one of two cores (Intel E6600) Status in “linux” package in Ubuntu: Incomplete 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/593427/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp