Public bug reported:
I've recently upgraded my M1330 from Kubuntu 10.10 to 11.10 but the
outer fan has been completely unresponsive since the new install. This
causes the bios to constantly throttle the CPU down to 1GHz, and if I
manually allow the governor to go to 1.83GHz on demand (with the
processor.ignore_ppc=1 boot flag) it often hits the critical 87° and
simply shuts down, usually within 30 seconds of starting any reasonably
computationally intensive task.
I've tried to address the issue using i8kutils but I do not only get bogus fan
speed output but also no reaction from the outer fan at all:
> sudo modprobe i8k
FATAL: Error inserting i8k
(/lib/modules/3.0.0-12-generic/kernel/drivers/char/i8k.ko): No such device
> sudo modprobe i8k force=1
> i8kctl
1.0 (null) HJY5X3J 60 -1 0 27660 0 0 -1
> i8kfan
-1 0
> i8kfan 2 2
-1 2
# but when I call i8kfan again immediately afterwards:
> i8kfan
-1 0
When I call i8kctl repeatedly I always get
1.0 (null) HJY5X3J 62 -1 0 27660 0 0 -1
with the occasional:
1.0 (null) HJY5X3J 63 -1 2 27660 57840 0 -1
thrown in, so something's trying to control the fan but to no effect. It's not
i8kmon because that's not even running.
If I load i8k with fan_mult=1 I simply get smaller values, i.e. either
1.0 (null) HJY5X3J 58 -1 0 922 0 0 -1
or
1.0 (null) HJY5X3J 60 -1 2 922 1928 0 -1
As I said it's a brand new fresh 11.10 install:
Linux dusty 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:50:42 UTC 2011 i686
i686 i386 GNU/Linux
i8kctl v1.5 10/11/2001
I was running 10.10 until last week where the fan worked flawlessly (and
loudly), I'm also on the most recent BIOS (A15).
** Affects: i8kutils (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/891175
Title:
cannot read or control fan speed on XPS M1330 since 11.10
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