Bug#640293: Presario A975 EM: fan runs at a constant (low) speed after hibernate, until it starts to overheat
- To: Philip Ashmore <email@example.com>
- Cc: firstname.lastname@example.org
- Subject: Bug#640293: Presario A975 EM: fan runs at a constant (low) speed after hibernate, until it starts to overheat
- From: Jonathan Nieder <email@example.com>
- Date: Wed, 15 Feb 2012 13:33:07 -0600
- Message-id: <[🔎] 20120215193307.GA23712@burratino>
- Reply-to: Jonathan Nieder <firstname.lastname@example.org>, email@example.com
- In-reply-to: <4E5D00EB.firstname.lastname@example.org>
- References: <4CA265FC.email@example.com> <1286043786.3916.137.camel@localhost> <4CA886EE.firstname.lastname@example.org> <1286114199.3916.146.camel@localhost> <4CA9C5D7.email@example.com> <20110830052850.GA9722@elie.gateway.2wire.net> <4E5D00EB.firstname.lastname@example.org>
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).
Thanks and hope that helps,