apport information ** Tags added: staging
** Description changed: Since the update to 3.2.0-24-generic kernel and despite >90% of idle CPU the load remains relatively high. On 3.2.0-17 it used to be barely above 0, now it rarely drops below 1. Powertop also reports high power usage by the CPU (~8W). The processor is 2.4GHz Intel i5-2430M and going back to 3.2.0-17-generic solves these problems. $ top top - 23:27:42 up 26 min, 3 users, load average: 1.66, 1.80, 1.46 Tasks: 216 total, 1 running, 214 sleeping, 0 stopped, 1 zombie Cpu(s): 0.2%us, 0.3%sy, 0.0%ni, 99.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 8082692k total, 2235412k used, 5847280k free, 159640k buffers Swap: 8294396k total, 0k used, 8294396k free, 984832k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3764 rmo 20 0 1075m 260m 38m S 1 3.3 1:39.84 firefox 4514 rmo 20 0 17452 1512 1072 R 1 0.0 0:00.12 top 1772 root 20 0 236m 6628 5236 S 0 0.1 0:00.47 NetworkManager 2013 root 20 0 154m 23m 8008 S 0 0.3 1:09.09 Xorg 3294 rmo 20 0 1190m 74m 30m S 0 0.9 1:28.46 compiz 3501 rmo 20 0 575m 20m 11m S 0 0.3 0:10.38 gnome-terminal 1 root 20 0 24544 2516 1380 S 0 0.0 0:01.22 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:00.20 ksoftirqd/0 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0 8 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1 10 root 20 0 0 0 0 S 0 0.0 0:00.18 ksoftirqd/1 13 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/2 14 root 20 0 0 0 0 S 0 0.0 0:00.60 kworker/2:0 15 root 20 0 0 0 0 S 0 0.0 0:00.09 ksoftirqd/2 17 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/3 19 root 20 0 0 0 0 S 0 0.0 0:00.06 ksoftirqd/3 21 root 0 -20 0 0 0 S 0 0.0 0:00.00 cpuset 22 root 0 -20 0 0 0 S 0 0.0 0:00.00 khelper 23 root 20 0 0 0 0 S 0 0.0 0:00.00 kdevtmpfs 24 root 0 -20 0 0 0 S 0 0.0 0:00.00 netns 26 root 20 0 0 0 0 S 0 0.0 0:00.00 sync_supers 27 root 20 0 0 0 0 S 0 0.0 0:00.00 bdi-default 28 root 0 -20 0 0 0 S 0 0.0 0:00.00 kintegrityd 29 root 0 -20 0 0 0 S 0 0.0 0:00.00 kblockd 30 root 0 -20 0 0 0 S 0 0.0 0:00.00 ata_sff 31 root 20 0 0 0 0 S 0 0.0 0:00.01 khubd 32 root 0 -20 0 0 0 S 0 0.0 0:00.00 md 34 root 20 0 0 0 0 S 0 0.0 0:00.00 khungtaskd 35 root 20 0 0 0 0 S 0 0.0 0:00.00 kswapd0 36 root 25 5 0 0 0 S 0 0.0 0:00.00 ksmd 37 root 39 19 0 0 0 S 0 0.0 0:00.00 khugepaged $ uname -a Linux flax 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I have compared CPU power usage (as reported by powertop) with the same programs running and it seems that on the newer kernel it's 2-2.5W higher whether idle, when running a browser or playing a movie. What other information should I include? + --- + AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. + ApportVersion: 2.0.1-0ubuntu7 + Architecture: amd64 + ArecordDevices: + **** List of CAPTURE Hardware Devices **** + card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] + Subdevices: 1/1 + Subdevice #0: subdevice #0 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: rmo 3195 F.... pulseaudio + Card0.Amixer.info: + Card hw:0 'PCH'/'HDA Intel PCH at 0xf7f00000 irq 51' + Mixer name : 'Intel CougarPoint HDMI' + Components : 'HDA:14f1506e,10280510,00100002 HDA:80862805,80860101,00100000' + Controls : 15 + Simple ctrls : 7 + DistroRelease: Ubuntu 12.04 + HibernationDevice: RESUME=UUID=3f6a429d-1aaa-4de1-b7c2-9e38a342e5f3 + MachineType: Dell Inc. Vostro V131 + Package: linux (not installed) + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-24-generic root=/dev/mapper/flax-root ro + ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 + RelatedPackageVersions: + linux-restricted-modules-3.2.0-24-generic N/A + linux-backports-modules-3.2.0-24-generic N/A + linux-firmware 1.79 + SourcePackage: linux + StagingDrivers: mei + Tags: precise staging precise staging + Uname: Linux 3.2.0-24-generic x86_64 + UpgradeStatus: Upgraded to precise on 2012-03-04 (65 days ago) + UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare + dmi.bios.date: 10/24/2011 + dmi.bios.vendor: Dell Inc. + dmi.bios.version: A03 + dmi.board.name: 0X3GJK + dmi.board.vendor: Dell Inc. + dmi.board.version: A03 + dmi.chassis.type: 8 + dmi.chassis.vendor: Dell Inc. + dmi.chassis.version: Not Specified + dmi.modalias: dmi:bvnDellInc.:bvrA03:bd10/24/2011:svnDellInc.:pnVostroV131:pvrNotSpecified:rvnDellInc.:rn0X3GJK:rvrA03:cvnDellInc.:ct8:cvrNotSpecified: + dmi.product.name: Vostro V131 + dmi.product.version: Not Specified + dmi.sys.vendor: Dell Inc. ** Attachment added: "AcpiTables.txt" https://bugs.launchpad.net/bugs/995284/+attachment/3138189/+files/AcpiTables.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/995284 Title: High idle load on 64bit Ubuntu 12.04 with 3.2.0-24-generic kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/995284/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs