On 15/02/12 19:33, Jonathan Nieder wrote:
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
Just as a last check after upgrading to 3.2.4-1 and
hibernating/resuming, I ran "sensors"
from the lm-sensors package.
It reported this:
acpitz-virtual-0
Adapter: Virtual device
temp1: +55.0°C (crit = +100.0°C)
even though I was running both cores at 100% for a few minutes.
It looks like the PC doesn't know it's overheating.
I decided not to wait for the "emergency vent" I reported before to kick in.
I rebooted and "sensors" reported:
acpitz-virtual-0
Adapter: Virtual device
temp1: +71.0°C (crit = +100.0°C)
After a minute or so the fan kicked in a bit more and the temperature
reduced gradually
to 48C.
It looks like the temperature sensor has a resolution of 7-8 degrees.
Does this help or should I still report it upstream?
Regards,
Philip Ashmore
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