Re: Beagle PM hangs

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,
  I have done some testing on a custom board. it uses uart2
  I also see serial hang issues here. I have a minimum defconfig with
 only i2c enabled. no cpuidle/cpufreq.

  This is what i try to do -

  # echo -n mem > /sys/power/state

  I wait for a min and try to wakeup - It works.

  If i wait a little longer before waking it up say, 3 or 4 minutes.
It does not wakeup.

  I tried the same disabling clocks when idle The result is the same.

   # echo -n 1 > /sys/power/sleep_while_idle
   # echo -n 1 > /sys/power/clocks_off_while_idle
   # echo -n mem > /sys/power/state

   With the above,  i see all domains hitting retention.
   I have tried both keypads and uart activity as my wakeup
   sources.
   Am trying to debug this. why the serial is dead if
   there is no activity for a longer time.


Regards,
sriram









On Wed, Jan 28, 2009 at 11:16 PM, Kevin Hilman
<khilman@xxxxxxxxxxxxxxxxxxx> wrote:
> Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> writes:
>
>> Peter Reid <ppeter.reid@xxxxxxxxx> writes:
>>
>>> Hi Kevin,
>>>    I get hangs after boot on beagle with latest PM tree i have quite a
>>> few scripts that run on boot.
>>>
>>>    have you seen this before?
>>
>> I have not, but I believe Koen has see something similar.  I've mainly
>> been testing just a minimal rootfs and a minimal set of drivers on
>> Beagle so I can hit full-chip off in idle.
>>
>> It would help if you could desribe your setup in more detail.  What
>> kernel config are you using, what rootfs are you using?  Does it hang
>> in the same spot every time?  If so, what is going on when it hangs?
>> Have you written anything to any of the /sys/power/* files?
>>
>
> Just a thought, do you still see these problems when using the CPUfreq
> performance governor instead of the ondemand governor?
>
> It could be pointing to some bugs in the switching of operating points.
>
> Kevin
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-omap" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux