lkml.org 
[lkml]   [2010]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: Fan runs full speed after S3 sometimes (regression)
    Date
    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


    \
     
     \ /
      Last update: 2010-08-21 01:33    [W:4.634 / U:0.508 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site