See first patch (does not fix the problem) and further discussion at
http://marc.info/?l=linux-kernel=146435528326660=2
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https://bugs.launchpad.net/bugs/1514052
Title:
Bug report submitted - http://marc.info/?l=linux-
kernel=144917448916562=2
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Title:
erratic fan speed and little control kernel 4.2
how can I add my bug to
https://bugzilla.kernel.org/show_bug.cgi?id=100121#c29.. I dont want to
create a new bug that just gets dropped as a duplicate.
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Loaded the latest Kernel ..
Following produced erratic fan speed .. see that the fan naming seems sorted.
Pity that did not solve it!
# echo 200 > /sys/class/hwmon/hwmon3/pwm1
# echo 70 > /sys/class/hwmon/hwmon3/pwm1
# sensors
radeon-pci-0100
Adapter: PCI adapter
temp1:+57.0°C (crit =
I take that back.. I see that the fan ordering is still the same as all
the other failing kernels... not that I think that it will make any
difference anyway!
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Peter Saunderson, the issue you are reporting is an upstream one. Could
you please report this problem following the instructions verbatim at
https://wiki.ubuntu.com/Bugs/Upstream/kernel to the appropriate venue
(TO: Pali Rohár Guenter Roeck, Greg Kroah-Hartman, and Arnd Bergmann CC:
Peter Saunderson, could you please test the latest mainline kernel
(4.4-rc2+cod1) and advise to the results?
** Tags removed: needs-bisect
** Tags added: bisect-done
** Tags added: kernel-bug-exists-upstream-4.3
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Cut from Bug Description.
** Attachment added: "dmesg"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514052/+attachment/4527212/+files/dmesg
** Description changed:
I have just upgraded to Ubuntu 15.10 and almost immediately my CPU fan
started speeding and slowing without good
** 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.
As expected f989e55452c74b4f7b22c889b8ec9f1192aaeec4 is a bad commit.
When kernel built with the preceeding commit
1a131ca1de7a84cf3827c418ee5971b493c6f23f then the fan is well behaved..
ie echo 200 > /sys/class/hwmon/hwmon3/pwm1
The fan speed builds up gradually and results in a reasonable
Small update... still using 1a131ca1de7a84cf3827c418ee5971b493c6f23f
CPU fan just shot up to high revs and then back down to low revs after several
hours of use. Just one shot no more high revs so very different
characteristics to the bad kernel but still interesting.
Core 0: +31.0°C
Just cloned the kernel source and confirmed that
f989e55452c74b4f7b22c889b8ec9f1192aaeec4 is in the range
Ubuntu-4.2.0-18.22 Ubuntu-3.19.0-20.20 so I will have a go first at
building / testing the kernel either side of this commit.
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Ok so I might have a bit of time to start this... in summary I have
already on my machine kernel 3.19.0-31-generic (last good version before
my update) kernel 4.2.0-17-generic (bad version installed with wily)
If I understand the basic process (from reading
Yuriy Vidineev, you need to use the default Ubuntu kernel (not the third
party mainline one).
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Title:
erratic fan speed and little
Hello Christopher,
Unfortunately I can't do it for now:
"The problem cannot be reported:
This is not an official Ubuntu package. Please remove any third party package
and try again."
I use 4.3.0-040300-generic.
Looks like simplest way to do it for me - download 16.04 daily build and test
on
Dell XPS13 9333, Ubuntu 14.04, linux 4.3.0-040300-generic
The same behavior
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Title:
erratic fan speed and little control kernel 4.2
Yuriy Vidineev, it will help immensely if you filed a new report via a terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
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Hi,
I've tried to use "ubuntu-bug linux", It open my browser, I login but I
don't know what to do after.
It says "no similar bug reports were found", must I create one new?
Paco
On 15/11/15 19:28, Christopher M. Penalver wrote:
> Paco Orozco, it will help immensely if you filed a new report
I have this problem on an Inspiron 580. Blacklisting dell-smm-hwmon
seems to solve it.
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Title:
erratic fan speed and little control
Paco Orozco, it will help immensely if you filed a new report via a terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
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sorry should have said
to stop itto stop it
echo 200 > /sys/class/hwmon/hwmon3/pwm1
echo 70 > /sys/class/hwmon/hwmon3/pwm1
reboot
before the reboot cpu fan is slow but erratic
whilst the reboot the cpu fan goes up to max then stops when linux unloaded.
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Just tried out the kernel as per instructions
Linux HomeMegaUbuntu 4.3.0-040300-generic #201511020949 SMP Mon Nov 2
14:50:44 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
echo 200 > /sys/class/hwmon/hwmon3/pwm1
echo 70 > /sys/class/hwmon/hwmon3/pwm1
results in the erratic fan speed.
if no erratic
Peter Saunderson, the next step is to fully commit bisect from kernel
3.19 to 4.2 in order to identify the last good kernel commit, followed
immediately by the first bad one. This will allow for a more expedited
analysis of the root cause of your issue. Could you please do this
following
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
erratic fan
The issue remains using the kernel 4.3.0 on my Dell Studio XPS 8000
This issue came when i upgraded My Ubuntu from vivid to wily so it
worked well on kernels 3.19.*
I have even done a fresh install of wily from the official ISO to be
sure it wasn't a configuration issue.
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Does this issue go away if you boot back into the prior kernel version?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.3 kernel[0].
If this bug is fixed in the mainline kernel, please add the
Since "dell-smm-hwmon" seems to be an alias of the i8k module, and based
on the solution from the #100121 of the kernel bug tracker, blacklist
"dell-smm-hwmon" resolved the issue at least on my Dell Studio XPS 8000.
I tried many hard reboots to confirm this.
However i don't really know this
attached dmi decode for the offending machine
** Attachment added: "dmidecode.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514052/+attachment/4515169/+files/dmidecode.txt
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I have the same problem with a DELL Studio XPS 8000.
This bug is related to this:
https://bugzilla.kernel.org/show_bug.cgi?id=100121
** Bug watch added: Linux Kernel Bug Tracker #100121
http://bugzilla.kernel.org/show_bug.cgi?id=100121
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On my machine I seem to have i8k built into the kernel rather than as a
loadable module
# modinfo i8k
filename:
/lib/modules/4.2.0-17-generic/kernel/drivers/hwmon/dell-smm-hwmon.ko
alias: i8k
license:GPL
description:Dell laptop SMM BIOS hwmon driver
author:
apport information
** Tags added: apport-collected wily
** 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.
I tried various things but then found that if I leave the
Just quick addition to the description..
Here is a log of the processor fan RPM taken over a few seconds as the PC is
idle showing what I consider to be excessive changes in the CPU fan RPM whilst
the CPU temperatures are quite low and the PC is idle:
Processor Fan:382 RPM
Processor Fan:
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