Public bug reported:
The fan never runs when Linux is running, despite reasonably
high temperatures inside a HP pavilion G6062EA laptop (G6000 series).
It is running in 64-bit mode.
The problem can be seen in /var/log/syslog:
Jul 19 15:45:08 nglap kernel: [ 16.228237] ACPI Exception (thermal-0339):
AE_BAD_DATA, No critical threshold [20070126]
But, the result of this problem is that /proc/acpi/thermal_zone is empty.
That means you can't even control the fans with user-mode software.
Whether or not the ACPI of the laptop is buggy, this is a bug in
thermal.ko . Even if the laptop doesn't set a thermal limit,
the fans still exist and should be controllable. The current behavior
of thermal.ko effectively sets an infinitely high thermal limit
and thus could be indirectly responsible for damage to
hardware. It'd be much better if it had a default thermal limit
built in at some reasonable value (e.g. 45C).
I know the laptop has working sensors, because using "sensors" from
the "lm-sensors" package works and the reported temperatures are
sensible. Oddly, though, it reports each temperature twice
and the temperatures don't exactly agree. (see log, attached).
I attach a dump from acpidump, if that helps.
So:
1) any help in getting thermal.ko to work would be very much appreciated,
2) thermal.ko does not fail gracefully. If no limit is set by the hardware,
it should set a default, print a warning message and continue.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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thermal.ko fails -> no fan on laptop
https://bugs.launchpad.net/bugs/250241
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