Bug report submitted - http://marc.info/?l=linux- kernel&m=144917448916562&w=2
-- 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/1514052 Title: erratic fan speed and little control kernel 4.2 Status in linux package in Ubuntu: Triaged Bug description: After upgrading to Ubuntu 15.10 my CPU fan started speeding and slowing without good reason even when the PC is idle. This has been bisected to commit f989e55452c74b4f7b22c889b8ec9f1192aaeec4 : i8k: Add support for fan labels This patch adds labels support for fans if SMM function with EAX register 0x03a3 reports it. This information was taken from DOS binary NBSVC.MDM. Additionally this patch change detection of fan presece. Instead reading fan status now detection is based on new label SMM function. Dell DOS binary NBSVC.MDM is doing similar checks, so we should do that too. This patch also remove I8K_FAN_LEFT and I8K_FAN_RIGHT usage from hwmon driver part because that names does not make sense anymore. So numeric constants are used instead. Original /proc/i8k ioctl part was not changed for compatibility reasons. Signed-off-by: Pali Rohár <pali.ro...@gmail.com> Reviewed-by: Guenter Roeck <li...@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> WORKAROUND: Shutdown. After it cools down for a while, turn it on. Tried intel_pstate but it is not supported for some reason on my machine ie the following does not work and I am left with driver: acpi-cpufreq GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=enable" Could not see ACPI Thermal Zones reported in dmesg $ dmesg | grep ACPI https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514052/+attachment/4527212/+files/dmesg --- ApportVersion: 2.19.1-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: pas 2076 F.... pulseaudio /dev/snd/controlC1: pas 2076 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 15.10 HibernationDevice: RESUME=UUID=68ce068c-1889-4f00-9b8a-12d7dc64348b InstallationDate: Installed on 2011-02-22 (1718 days ago) InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: Dell Inc. Inspiron 580 Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-17-generic root=UUID=bf510382-4d2b-49d6-b9d9-ac6e3f6334eb ro intel_pstate=enable ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3 RelatedPackageVersions: linux-restricted-modules-4.2.0-17-generic N/A linux-backports-modules-4.2.0-17-generic N/A linux-firmware 1.149.1 RfKill: Tags: wily Uname: Linux 4.2.0-17-generic x86_64 UpgradeStatus: Upgraded to wily on 2015-11-06 (0 days ago) UserGroups: adm admin cdrom dialout fuse lpadmin plugdev sambashare vboxusers wireshark _MarkForUpload: True dmi.bios.date: 11/13/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.name: 0C2KJT dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA07:bd11/13/2010:svnDellInc.:pnInspiron580:pvr:rvnDellInc.:rn0C2KJT:rvrA00:cvnDellInc.:ct3:cvr: dmi.product.name: Inspiron 580 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514052/+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
