erratic fan speed and little control kernel 4.2
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Triaged
|
High
|
Unassigned |
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 f989e55452c74b4
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 <email address hidden>
Reviewed-by: Guenter Roeck <email address hidden>
Signed-off-by: Greg Kroah-Hartman <email address hidden>
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_
Could not see ACPI Thermal Zones reported in dmesg
$ dmesg | grep ACPI
https:/
---
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.10
HibernationDevice: RESUME=
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=
ProcVersionSign
RelatedPackageV
linux-
linux-
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.
dmi.product.name: Inspiron 580
dmi.sys.vendor: Dell Inc.
tags: | added: kernel-bug-exists-upstream |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
description: | updated |
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1514052
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.