I'm requesting a backport of commit 81ad4276b505 from kernel 4.6 to kernel 4.4 as it addresses the bogus passive trip point to 0 degrees Celsius. The patch is essential for Lenovo laptops. This would be very beneficial for openSUSE 42.2 since "Alpha 1" was recently released for testing. It's kernel will be based on a yearly LTS kernel. This year it will be using kernel 4.4.
commit 81ad4276b505e987dd8ebbdf63605f92cd172b52 Author: Zhang Rui <rui.zhang@intel.com> Date: Fri Mar 18 10:03:24 2016 +0800 Thermal: Ignore invalid trip points In some cases, platform thermal driver may report invalid trip points, thermal core should not take any action for these trip points. This fixed a regression that bogus trip point starts to screw up thermal control on some Lenovo laptops, after commit bb431ba26c5cd0a17c941ca6c3a195a3a6d5d461 Author: Zhang Rui <rui.zhang@intel.com> Date: Fri Oct 30 16:31:47 2015 +0800 Thermal: initialize thermal zone device correctly After thermal zone device registered, as we have not read any temperature before, thus tz->temperature should not be 0, which actually means 0C, and thermal trend is not available. In this case, we need specially handling for the first thermal_zone_device_update(). Both thermal core framework and step_wise governor is enhanced to handle this. And since the step_wise governor is the only one that uses trends, so it's the only thermal governor that needs to be updated. Tested-by: Manuel Krause <manuelkrause@netscape.net> Tested-by: szegad <szegadlo@poczta.onet.pl> Tested-by: prash <prash.n.rao@gmail.com> Tested-by: amish <ammdispose-arch@yahoo.com> Tested-by: Matthias <morpheusxyz123@yahoo.de> Reviewed-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> CC: <stable@vger.kernel.org> #3.18+ Link: https://bugzilla.redhat.com/show_bug.cgi?id=1317190 Link: https://bugzilla.kernel.org/show_bug.cgi?id=114551 Signed-off-by: Zhang Rui <rui.zhang@intel.com> As you can see, the patch has already been CCed to all stable kernel. I think you should ping stable kernel directly. Bug report closed as this kernel bugzilla is used to track the problems in the latest upstream kernel.
or you can reply the patch email directly, and make sure the stable mailing list is CCed. :)
Understood. Thank you for your time.
Follow Up Do you have the list of Lenovo laptops experiencing this problem.
no, but I think you can dive into the two bug reports referred by the patch and collect those laptop models.
No problem, I found them.