** Description changed: - I have just upgraded to Ubuntu 15.10 and almost immediately my CPU fan - started speeding and slowing without good reason even when the PC is - idle. + After upgrading to Ubuntu 15.10 my CPU fan started speeding and slowing + without good reason even when the PC is idle. - I tried various things but then found that if I leave the computer off - for a long time and let everything cool down then when I boot from cold - the CPU fan is stable. + This has been bisected to commit f989e55452c74b4f7b22c889b8ec9f1192aaeec4 : + i8k: Add support for fan labels - To test my theory of cold start out I then ran - sudo cpupower frequency-set -g powersave - followed by - sudo cpupower frequency-set -g ondemand + 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. - The final mode is the initial mode. Almost immediately as soon as I - moved to powersave mode the erratic fan speed started. It did not stop - when I returned to ondemand. + 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. - Temp fix for this behaviour is - go and have a cup of coffee and let the - computer cool down when you restart: shutdown then start from cold. + 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. - $ cpupower frequency-info - analyzing CPU 0: - driver: acpi-cpufreq - CPUs which run at the same hardware frequency: 0 - CPUs which need to have their frequency coordinated by software: 0 - maximum transition latency: 10.0 us. - hardware limits: 1.20 GHz - 2.80 GHz - available frequency steps: 2.80 GHz, 2.80 GHz, 2.67 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz, 2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz - available cpufreq governors: conservative, ondemand, userspace, powersave, performance - current policy: frequency should be within 1.20 GHz and 2.80 GHz. - The governor "ondemand" may decide which speed to use - within this range. - current CPU frequency is 1.20 GHz. - cpufreq stats: 2.80 GHz:11.93%, 2.80 GHz:0.00%, 2.67 GHz:0.40%, 2.53 GHz:0.44%, 2.40 GHz:0.51%, 2.27 GHz:0.55%, 2.13 GHz:0.35%, 2.00 GHz:0.72%, 1.87 GHz:0.84%, 1.73 GHz:1.00%, 1.60 GHz:2.16%, 1.47 GHz:4.61%, 1.33 GHz:16.83%, 1.20 GHz:59.65% (29241) - boost state support: - Supported: yes - Active: yes - 25500 MHz max turbo 4 active cores - 25500 MHz max turbo 3 active cores - 25500 MHz max turbo 2 active cores - 25500 MHz max turbo 1 active cores + 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.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1514052 Title: erratic fan speed and little control kernel 4.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514052/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
