Fan runs full speed after S3 sometimes (regression)

Fan runs full speed after S3 sometimes (regression)

[Jiri Slaby]

Hi,

till I was running on 2.6.34-rc5-mm1 (mmotm) and earlier everything was
fine. Now, I'm running 2.6.35-rc6-mm1 (.35-rc5-mm1 was the same) and
sometimes when the computer (desktop) returns from S3, the CPU fan is
running at full speed making a big noise.

I don't know how to debug that. Bisection is out of question -- it
happens once in 10 or 20 cases. There are no fan entries in /sys.

The load is as follows:
$ while :; do cat /proc/loadavg; sleep 3; done
0.37 0.33 0.32 1/325 21358
0.42 0.34 0.32 1/325 21362
0.42 0.34 0.32 1/326 21366
0.38 0.33 0.32 1/330 21386
0.38 0.33 0.32 1/331 21391
0.35 0.33 0.32 1/331 21394
0.32 0.32 0.32 1/331 21397
0.32 0.32 0.32 1/331 21400
0.30 0.32 0.32 1/331 21403
...

I can boot into 34-rc5 to compare that if this is of relevance.

290 kB kernel log since boot over several S3 sleep till now where the
fan is noisy:
http://www.fi.muni.cz/~xslaby/sklad/panics/boot.msg-fan_fullspeed

Should you need DSDT, it's there too:
http://www.fi.muni.cz/~xslaby/sklad/panics/DSDT

Any ideas what could have caused this?

thanks,
-- 
js

Re: Fan runs full speed after S3 sometimes (regression)

[Jiri Slaby]

On 08/10/2010 01:20 PM, Jiri Slaby wrote:
> Hi,
> 
> till I was running on 2.6.34-rc5-mm1 (mmotm) and earlier everything was
> fine. Now, I'm running 2.6.35-rc6-mm1 (.35-rc5-mm1 was the same) and
> sometimes when the computer (desktop) returns from S3, the CPU fan is
> running at full speed making a big noise.

Just to add, full power cycle is needed to get rid of that. Warm reboot
is not enough.

> I don't know how to debug that. Bisection is out of question -- it
> happens once in 10 or 20 cases. There are no fan entries in /sys.
> 
> The load is as follows:
> $ while :; do cat /proc/loadavg; sleep 3; done
> 0.37 0.33 0.32 1/325 21358
> 0.42 0.34 0.32 1/325 21362
> 0.42 0.34 0.32 1/326 21366
> 0.38 0.33 0.32 1/330 21386
> 0.38 0.33 0.32 1/331 21391
> 0.35 0.33 0.32 1/331 21394
> 0.32 0.32 0.32 1/331 21397
> 0.32 0.32 0.32 1/331 21400
> 0.30 0.32 0.32 1/331 21403
> ...
> 
> I can boot into 34-rc5 to compare that if this is of relevance.
> 
> 290 kB kernel log since boot over several S3 sleep till now where the
> fan is noisy:
> http://www.fi.muni.cz/~xslaby/sklad/panics/boot.msg-fan_fullspeed
> 
> Should you need DSDT, it's there too:
> http://www.fi.muni.cz/~xslaby/sklad/panics/DSDT
> 
> Any ideas what could have caused this?
> 
> thanks,
-- 
js

Re: Fan runs full speed after S3 sometimes (regression)

[Pavel Machek]

On Tue 2010-08-10 20:39:44, Jiri Slaby wrote:
> On 08/10/2010 01:20 PM, Jiri Slaby wrote:
> > Hi,
> > 
> > till I was running on 2.6.34-rc5-mm1 (mmotm) and earlier everything was
> > fine. Now, I'm running 2.6.35-rc6-mm1 (.35-rc5-mm1 was the same) and
> > sometimes when the computer (desktop) returns from S3, the CPU fan is
> > running at full speed making a big noise.
> 
> Just to add, full power cycle is needed to get rid of that. Warm reboot
> is not enough.

Seems like bios problem... Update bios?

> > I don't know how to debug that. Bisection is out of question -- it
> > happens once in 10 or 20 cases. There are no fan entries in /sys.

Well, doing 20 suspends in a row from a script should not be too bad.

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Re: Fan runs full speed after S3 sometimes (regression)

[Jiri Slaby]

On 08/20/2010 08:31 AM, Pavel Machek wrote:
> On Tue 2010-08-10 20:39:44, Jiri Slaby wrote:
>> On 08/10/2010 01:20 PM, Jiri Slaby wrote:
>>> Hi,
>>>
>>> till I was running on 2.6.34-rc5-mm1 (mmotm) and earlier everything was
>>> fine. Now, I'm running 2.6.35-rc6-mm1 (.35-rc5-mm1 was the same) and
>>> sometimes when the computer (desktop) returns from S3, the CPU fan is
>>> running at full speed making a big noise.
>>
>> Just to add, full power cycle is needed to get rid of that. Warm reboot
>> is not enough.
> 
> Seems like bios problem... Update bios?

I don't think so, it had been working for more than 2 years before this
issue appeared.

>>> I don't know how to debug that. Bisection is out of question -- it
>>> happens once in 10 or 20 cases. There are no fan entries in /sys.
> 
> Well, doing 20 suspends in a row from a script should not be too bad.

20 is just a guess. I haven't seen it for pretty few days until the day
before yesterday. And it looks like CPU1 is brought up a half way. When
the fan was at full speed I tried:
echo 0 > /sys/devices/system/cpu/cpu1/online
and whole system freezed. Otherwise this commands succeeds.

I'll load a crash kernel prior turning the CPU off next time.

thanks,
-- 
js

Re: Fan runs full speed after S3 sometimes (regression)

[Rafael J. Wysocki]

On Friday, August 20, 2010, Jiri Slaby wrote:
> On 08/20/2010 08:31 AM, Pavel Machek wrote:
> > On Tue 2010-08-10 20:39:44, Jiri Slaby wrote:
> >> On 08/10/2010 01:20 PM, Jiri Slaby wrote:
> >>> Hi,
> >>>
> >>> till I was running on 2.6.34-rc5-mm1 (mmotm) and earlier everything was
> >>> fine. Now, I'm running 2.6.35-rc6-mm1 (.35-rc5-mm1 was the same) and
> >>> sometimes when the computer (desktop) returns from S3, the CPU fan is
> >>> running at full speed making a big noise.
> >>
> >> Just to add, full power cycle is needed to get rid of that. Warm reboot
> >> is not enough.
> > 
> > Seems like bios problem... Update bios?
> 
> I don't think so, it had been working for more than 2 years before this
> issue appeared.
> 
> >>> I don't know how to debug that. Bisection is out of question -- it
> >>> happens once in 10 or 20 cases. There are no fan entries in /sys.
> > 
> > Well, doing 20 suspends in a row from a script should not be too bad.
> 
> 20 is just a guess. I haven't seen it for pretty few days until the day
> before yesterday. And it looks like CPU1 is brought up a half way. When
> the fan was at full speed I tried:
> echo 0 > /sys/devices/system/cpu/cpu1/online
> and whole system freezed. Otherwise this commands succeeds.
> 
> I'll load a crash kernel prior turning the CPU off next time.

You can also try to use RTC wakealarm to run suspend/resume in a tight loop.

Rafael

Re: Fan runs full speed after S3 sometimes (regression)

[Pavel Machek]

Hi!

> >>> till I was running on 2.6.34-rc5-mm1 (mmotm) and earlier everything was
> >>> fine. Now, I'm running 2.6.35-rc6-mm1 (.35-rc5-mm1 was the same) and
> >>> sometimes when the computer (desktop) returns from S3, the CPU fan is
> >>> running at full speed making a big noise.
> >>
> >> Just to add, full power cycle is needed to get rid of that. Warm reboot
> >> is not enough.
> > 
> > Seems like bios problem... Update bios?
> 
> I don't think so, it had been working for more than 2 years before this
> issue appeared.

Well; if it survives warm reboot, then it looks like BIOS problem...

> >>> I don't know how to debug that. Bisection is out of question -- it
> >>> happens once in 10 or 20 cases. There are no fan entries in /sys.
> > 
> > Well, doing 20 suspends in a row from a script should not be too bad.
> 
> 20 is just a guess. I haven't seen it for pretty few days until the day
> before yesterday. And it looks like CPU1 is brought up a half way. When
> the fan was at full speed I tried:
> echo 0 > /sys/devices/system/cpu/cpu1/online
> and whole system freezed. Otherwise this commands succeeds.

Ok, so this looks like the kernel problem, on the other hand. Two
different problems?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Re: Fan runs full speed after S3 sometimes (regression)

[Jiri Slaby]

Hi.

On 08/21/2010 07:05 PM, Pavel Machek wrote:
>>>>> I don't know how to debug that. Bisection is out of question -- it
>>>>> happens once in 10 or 20 cases. There are no fan entries in /sys.
>>>
>>> Well, doing 20 suspends in a row from a script should not be too bad.
>>
>> 20 is just a guess. I haven't seen it for pretty few days until the day
>> before yesterday. And it looks like CPU1 is brought up a half way. When
>> the fan was at full speed I tried:
>> echo 0 > /sys/devices/system/cpu/cpu1/online
>> and whole system freezed. Otherwise this commands succeeds.
> 
> Ok, so this looks like the kernel problem, on the other hand. Two
> different problems?

Actually, I haven't seen it after an upgrade to the next -mm kernel.
Consider it as closed as WORKSFORME for now.

thanks anyway,
-- 
js

Re: Fan runs full speed after S3 sometimes (regression)

[Rafael J. Wysocki]

On Wednesday, September 08, 2010, Jiri Slaby wrote:
> Hi.
> 
> On 08/21/2010 07:05 PM, Pavel Machek wrote:
> >>>>> I don't know how to debug that. Bisection is out of question -- it
> >>>>> happens once in 10 or 20 cases. There are no fan entries in /sys.
> >>>
> >>> Well, doing 20 suspends in a row from a script should not be too bad.
> >>
> >> 20 is just a guess. I haven't seen it for pretty few days until the day
> >> before yesterday. And it looks like CPU1 is brought up a half way. When
> >> the fan was at full speed I tried:
> >> echo 0 > /sys/devices/system/cpu/cpu1/online
> >> and whole system freezed. Otherwise this commands succeeds.
> > 
> > Ok, so this looks like the kernel problem, on the other hand. Two
> > different problems?
> 
> Actually, I haven't seen it after an upgrade to the next -mm kernel.
> Consider it as closed as WORKSFORME for now.

Great, thanks fot the update.  Let's hope it was a temporary glitch.

Thanks,
Rafael