Public bug reported: On Fujitsu A544 laptop (and likely others) fitted with SSD, kworker takes 100% of one core of CPU due to GPE13 interrupt storm
See upstream bug https://bugzilla.kernel.org/show_bug.cgi?id=53071 The bug can be identified by repeatedly running cat /sys/firmware/acpi/interrupts/gpe13 where a rapidly increasing count will be seen. Workaround: sudo sh -c 'echo "disable" > /sys/firmware/acpi/interrupts/gpe13' disables it until reboot Using sudo crontab -e and adding the line @reboot echo "disable" > /sys/firmware/acpi/interrupts/gpe13 works around for subsequent boots. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.1.0-3-generic 4.1.0-3.3 ProcVersionSignature: Ubuntu 4.1.0-3.3-generic 4.1.3 Uname: Linux 4.1.0-3-generic x86_64 ApportVersion: 2.18-0ubuntu9 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: colinl 1699 F.... pulseaudio /dev/snd/controlC1: colinl 1699 F.... pulseaudio CurrentDesktop: Unity Date: Wed Sep 2 16:03:19 2015 InstallationDate: Installed on 2014-10-21 (316 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20141017) MachineType: FUJITSU LIFEBOOK A544 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.1.0-3-generic root=UUID=c68c6484-d8d6-44f6-b429-892aa6ef74cf ro RelatedPackageVersions: linux-restricted-modules-4.1.0-3-generic N/A linux-backports-modules-4.1.0-3-generic N/A linux-firmware 1.147 RfKill: 0: phy0: Wireless LAN Soft blocked: yes Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to wily on 2015-08-31 (1 days ago) dmi.bios.date: 04/01/2015 dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd. dmi.bios.version: Version 1.19 dmi.board.name: FJNBB35 dmi.board.vendor: FUJITSU dmi.chassis.type: 10 dmi.chassis.vendor: FUJITSU dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.19:bd04/01/2015:svnFUJITSU:pnLIFEBOOKA544:pvr:rvnFUJITSU:rnFJNBB35:rvr:cvnFUJITSU:ct10:cvr: dmi.product.name: LIFEBOOK A544 dmi.sys.vendor: FUJITSU ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug wily -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1491467 Title: kworker consuming cpu due to GPE13 interrupt storm on Fujitsu A544 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1491467/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
