I am using a Fujitsu Lifebook A544, with normal HDD and optical drive. The high-cpu load issue is present with kernel 3.19 (Ubuntu Trusty), 4.2 (Ubuntu Wily and Fedora 23) and 4.3 (Ubuntu Xenial), with BIOS 1.18 and 1.19. Moreover, the optical drive seems to be unable to read CDs and DVDs.
After upgrading the BIOS to 1.20, the problem disappears with all the aforementioned kernels, and the optical drive is back to reading CDs and DVDs again. I believe that the issue was known by Fujitsu itself, since it reports the bug as fixed in the BIOS 1.19-1.20 changelog. I am wondering if upgrading the BIOS solves the problem also for the SSD-equipped laptop. -- 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/1491467 Title: kworker consuming cpu due to GPE13 interrupt storm on Fujitsu A544 Status in Linux: Unknown Status in linux package in Ubuntu: In Progress Status in linux source package in Wily: In Progress Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1491467/+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
