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** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Tags added: kernel-request-3.19.0-15.15
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https://bugs.launchpad.net/bugs/1452421
Title:
ubuntu 15.04 overheats
Status in linux package in Ubuntu:
Incomplete
Bug description:
On 2015-04-26 I upgraded to Ubuntu 15.04 (from 14.10). Since then, my
notebook (HP envy dv6) fan is nearly always on, and the notebook
switched off several times, probably due to overheating. Each time I
was working with Firefox; watching the "livestream" of
www.tagesschau.de seems to be a good way of reproducing the problem.
Going back to the 3.16.0-31 kernel (still offered by grub) seems to
circumvent the problem. When I boot 3.16 the fan runs only
occasionally. My first 15.04 kernel was 3.19.0-15, today I got -16 but
the problem is the same.
Before the machine switches off (it does not shut down Linux but just
goes out) "top" shows me eight instances of "kidle_inject", obviously
desperately but hopelessly trying to keep processor load down. Under
the 3.19 kernel the "plugin-container" process goes to loads of more
than 100 % (on a four-core box), under 3.16 it never goes beyond 60 %.
Note that between the "overheat" and the "normal" scenario I change
only the kernel in the boot menu, all other binaries are the same
(15.04). Especially, it's the same firefox.
I fear that within a couple of weeks more kernel versions will arrive
at my system and eventually push the working 3.16 kernel out of my
grub menu, and then I shall have no way left of running my system for
more than 20 or 30 minutes.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: kernel-common (not installed)
ProcVersionSignature: Ubuntu 3.16.0-34.47-generic 3.16.7-ckt8
Uname: Linux 3.16.0-34-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed May 6 20:57:39 2015
InstallationDate: Installed on 2014-06-09 (331 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: kernel-package
UpgradeStatus: Upgraded to vivid on 2015-04-24 (12 days ago)
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