Re: [lm-sensors] possible ACPI vs w83627hf conflict,

[Jean Delvare <khali@linux-fr.org>]

On Wed, 26 Sep 2007 15:13:50 +0200, Hans de Goede wrote:
> James wrote:
> > I'm having problems with what seems to be lm_sensors and the kernel 
> > having an argument in fedora! Instead of re-writing the content of my 
> > posts to fedora forum and bugzilla I will post the links here if that is 
> > ok? If anyone could help me resolve this issue I'd appreciate it! 
> > lm_sensors isnt vital for my system but it is handy!
> > 
> > System:
> > Fedora 7, (Linux JamesFedora 2.6.22.5-76.fc7 #1 SMP Thu Aug 30 13:47:21 
> > EDT 2007 i686 athlon i386 GNU/Linux)

Is there no newer kernel available? Upstream stable kernel is at
2.6.22.9 by now.

> > Original questions on:
> > http://www.fedoraforum.org/forum/showthread.php?p‡1271#post871271
> > 
> > Reported to bugzilla about lm_sensors but then moved as explained...
> > https://bugzilla.redhat.com/show_bug.cgi?id06801
> > 
> > Can I provide any more information to help the problem?
> > I've temporarily disabled lm_sensors to try to prevent filesystem damage 
> > while im work on an important document, in a week or so I can continue 
> > testing it.
> 
> Indeed there is no need to type your Fedora report again, but next time please 
> copy and paste it for reader convenience (I've done that for you now):
> 
> ---
> 
> Description of problem:
> System freezes completely. Scanning logs only turns up kernel null-pointer bugs
> that appear to be linked in to the sensors files....see my post
> http://www.fedoraforum.org/forum/showthread.php?p‡1271#post871271
> 
> Version-Release number of selected component (if applicable):
> lm_sensors-2.10.4-1.fc7
> 
> How reproducible:
> Random, but a couple of times per day. Causes file system damage when the system
> has locked up and needs a hard reset.
> 
> Steps to Reproduce:
> 1.Impossible to tell, however usually doing something fairly intensive when it
> occurs, but never in the same package. Always listening to music over and NFS
> shared mount at the time.
> 2.
> 3.
> 
> Actual results:
> -
> 
> Expected results:
> -
> 
> Additional info:
> I'm not sure if this is an lm_sensors fault, but it seems that the last sys file
> used every time is the hardware monitor file:
> /devices/platform/w83627hf.656/....

This can be explained easily if you have an application repeatedly
polling the temperature values: the last read file will always be the
same, but that doesn't mean that it has anything to do with the crash.
ksensors is such an application.

As I stated in bugzilla already, the backtraces in your forum post do
not point at a hwmon driver problem, nor to ACPI. The few hwmon vs. ACPI
issues we've seen lately had completely different symptoms. The
backtraces seem to point to networking and/or filesystem issues. So for
now I need to be convinced (with additional testing) that the w83627hf
driver has anything to do with the crashes.

I would be grateful if users could stop blaming hwmon and ACPI for
being the cause of all bugs that happen in the kernel ;)

-- 
Jean Delvare

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