Sensors not updated causing CPU to heat after suspend/hibernate on laptop acer aspire 5315
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Linux |
Invalid
|
Medium
|
|||
linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: linux-source-2.6.22 (gutsy)
CPU heat sensor is not updated on Acer aspire 5315 when you return from suspend or hibernate.
'cat /proc/acpi/
Under normal conditions (i.e. when you start from a fresh boot) the sensors are updated correctly and the CPU fan runs.
It is important to note that even on Windows (both XP and Vista), acer provides a tool ("Empowering management") that is required to run the computer, and that appear to do this trick: start the CPU fan (or update the sensors) when you have returned from suspend. So it's not completely Linux's fault.
As everything is going right from a fresh boot, I guess it is possible to fix this problem. The system should (for example) be able to reload the sensor module when returning from suspend. This laptop was widely sold this because because of its low-cost in both the US and Europe, so it would be nice to support it.
This bug is a showstopper for most users as their machine can shutdown randomly unless they have discovered where the bug comes from.
If you need more testing, just ask.
For more info you may refer to the thread where everything was developed:
http://
Thanks
Changed in linux: | |
assignee: | nobody → ubuntu-kernel-acpi |
description: | updated |
Changed in linux: | |
status: | Unknown → Incomplete |
Changed in linux: | |
status: | Incomplete → In Progress |
Changed in linux: | |
status: | Incomplete → Confirmed |
Changed in linux: | |
status: | In Progress → Invalid |
Changed in linux: | |
importance: | Unknown → Medium |
Changed in linux (Ubuntu): | |
assignee: | Ubuntu Kernel ACPI Team (ubuntu-kernel-acpi) → nobody |
Termal control should be done by EC ( embeded controller ), as i understand dsdt do not provide critical informatiom to do this. There is kernel part to emulate this ( i had same problem with my samsung nv5000 ) but the best way to fix it is go upstream, becouse it need a lot of testing.
bugzilla.kernel.org