Bug#640293: Presario A975 EM: fan runs at a constant (low) speed after hibernate, until it starts to overheat

[Jonathan Nieder <jrnieder@gmail.com>]

Hi Philip,

Philip Ashmore wrote:

> The thing is, when my laptop resumes from hibernate:
> The fan runs at a constant audible low speed.
> Usually the fan is so quiet it's inaudible when the cpu is idle, but after
> hibernate I know something's up.
>
> artsd pops up a message box - cpu overload, aborting.
>
> When I run something that taxes one or both cores, the fan speed doesn't
> increase, but a couple of minutes in the fan will suddenly jump to full
> "emergency vent" mode and the plastic casing near the vent is almost too hot
> to touch.

I think our best bet for solving this is to get help from upstream.

Please test 3.2.4-1 from unstable or newer, and if it reproduces the
bug, file a report at <http://bugzilla.kernel.org/>, product ACPI,
component Power-Fan and let us know the bug number so we can track it.

Be sure to attach output from "acpidump", "grep .  /sys/class/thermal/*/*"
before and after hibernating, and "dmesg" after hibernating (as
separate attachments, uncompressed).

Compare <https://bugzilla.kernel.org/show_bug.cgi?id=19452>.

Thanks and hope that helps,
Jonathan