Juha Kuikka <juha.kui...@gmail.com> writes:

> On Tue, Oct 6, 2009 at 4:16 PM, Kevin Hilman
> <khil...@deeprootsystems.com> wrote:
>>
>> Kevin Hilman <khil...@deeprootsystems.com> writes:
>>
>> > Hello,
>> >
>> > I've rebased/updated the PM branch based on current linux-omap master
>> > branch (2.6.32-rc1 based.)
>> >
>> > I've also updated the OMAP Power Management wiki, and the 'Current
>> > version' section highlights the changes, supported platforms as well
>> > as the features that have made it into mainline.
>> >
>> >      http://elinux.org/OMAP_Power_Management#Current_version
>> >
>>
>> FYI... I just rebased the PM branch onto current omap/master.
>>
>> Some important user-visible changes: The /sys/power/* options are
>> moving into debugfs.  For mainline, these primarily debug options need
>> to move to debugfs so I've moved them there.  So, if you're missing
>> some flag under /sys/power, it's now under /debug/pm_debug.
>>
>> I've updated the 'Using the PM branch' seciont of PM wiki[1] with
>> the new filenames.
>>
>> Kevin
>>
>> [1] http://elinux.org/OMAP_Power_Management
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>
> Hi,

Hi Juha,

> I build and tried this latest on Beagleboard (C2). Booting from MMC
> using ramdisk image. I changed the LL console to the 3rd UART.
>
> The issue I have is that after the system boots up it works for as
> long as I keep actively using it but if I leave it idle for a short
> time (~5s) it stops responding. I have tried waking it up using both
> UART and "USER" button on the board. This is with the default PM
> configuration.

Thanks for testing, and reporting your problem.  I have noticed
exactly the same problem and am still investigating it.

> If I put the board into suspend (retention) it wakes up without any issues.
>
> Also, if I enable "/debug/pm_debug/sleep_while_idle" board wakes up
> without issues. Well the first couple characers on the console seem to
> go missing but I guess without CTS/RTS that is expected?

Yes, the loss of the first character is expected.

> Any pointers would be appreciated.

I also noticed that it works when 'sleep_while_idle' is enabled, and
this has led me to suspect a bug in that serial timout path, but I
have yet to debug further.

Kevin
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