I'm on 18.04, and saw huge cpu use all of a sudden by 4 tasks called kidle_inject running at 40% CPU each. I'm quite used to having this Thinkpad x230 tablet run hot since graphics e.g. for video don't seem to be accelerated. But in this case, the CPU and temperature as reported by psensor was not elevated before the kidle_inject processes went into overdrive. I'm not used to seeing them running normally.
I followed the advice at kidle_inject causing very high load - Ask Ubuntu https://askubuntu.com/questions/584636/kidle-inject-causing-very-high-load to rmmod intel_powerclamp, and that killed the processes, but the temperature went up a bit, now to 100 degrees C, again despite low CPU load. So something is going wrong here... -- 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/1389077 Title: [HP ProBook 4530s / Lenovo G580] Intel Powerclamp is Slowing CPU Status in linux package in Ubuntu: Confirmed Bug description: I upgraded from KUbuntu 14.04 to 14.10. Immediately, while playing minecraft with my daughter, I noticed the game was running very slowly. Even after closing the game, my web browsing slowed to a crawl. Looking at the processes in top, I noticed there were 4 tasks called kidle_inject running at 50% CPU each. After spending a long time figuring out what caused this, I found out this is caused by the Intel Powerclamp driver. I never did anything to enable this, and haven't observed this slowdown before the upgrade. I found the powerclamp driver in the /sys/class/thermal/cooling_device5 directory: root@bkat-HP-ProBook-4530s:/sys/class/thermal/cooling_device5# cat type intel_powerclamp root@bkat-HP-ProBook-4530s:/sys/class/thermal/cooling_device5# cat cur_state -1 root@bkat-HP-ProBook-4530s:/sys/class/thermal/cooling_device5# cat max_state 50 I tried to echo 0 to cur_state, but it still reported -1 when I catted the value. There seems to be no obvious way to disable this, and this should not have been enabled in the first place. ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-24-generic 3.16.0-24.32 ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4 Uname: Linux 3.16.0-24-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bkat 2780 F.... pulseaudio CurrentDesktop: KDE Date: Mon Nov 3 23:16:04 2014 HibernationDevice: RESUME=UUID=35e1d874-a3bd-4227-acab-16f3e929d993 InstallationDate: Installed on 2012-04-22 (925 days ago) InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) MachineType: Hewlett-Packard HP ProBook 4530s ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=743f1686-bfe7-4e32-911d-5371633ccec8 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-24-generic N/A linux-backports-modules-3.16.0-24-generic N/A linux-firmware 1.138 SourcePackage: linux UpgradeStatus: Upgraded to utopic on 2014-11-03 (0 days ago) dmi.bios.date: 05/13/2011 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68SRR Ver. F.09 dmi.board.name: 167C dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 22.1A dmi.chassis.asset.tag: CNU1284V1X dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68SRRVer.F.09:bd05/13/2011:svnHewlett-Packard:pnHPProBook4530s:pvrA0001D02:rvnHewlett-Packard:rn167C:rvrKBCVersion22.1A:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP ProBook 4530s dmi.product.version: A0001D02 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1389077/+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
