wakeup wakelock issues

[Sriram V]

Hi,
  I am trying to test pm on a custom board with android.

  Whats happening:
   1) Android is putting the system to sleep - calling system wide suspend
   2) During suspend, kernel resume immediately - I get "wakeup wake lock: omap-8250-serial". and again puts it back to suspend.
   3) This keeps happening, There is no serial activity except for printing the messages (transmission from the board) - No serial inputs from the host pc.
   4) Is there any way to disable this?
  

Regards,
sriram



# PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.01 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
Powerdomain (iva2_pwrdm) didn't enter target state 1
Powerdomain (core_pwrdm) didn't enter target state 1
Could not enter target state in pm_suspend
wakeup wake lock: omap-8250-serial
usb 1-2: reset high speed USB device using ehci-omap and address 2
Restarting tasks ... <7>hub 1-0:1.0: state 7 ports 3 chg 0004 evt 0000
done.
suspend: exit suspend, ret = 0 (2000-01-01 03:42:06.047454761 UTC)
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.00 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
Powerdomain (iva2_pwrdm) didn't enter target state 1
Powerdomain (core_pwrdm) didn't enter target state 1
Could not enter target state in pm_suspend
wakeup wake lock: omap-8250-serial
usb 1-2: reset high speed USB device using ehci-omap and address 2
Restarting tasks ... <7>hub 1-0:1.0: state 7 ports 3 chg 0004 evt 0000
done.
suspend: exit suspend, ret = 0 (2000-01-01 03:42:16.157318042 UTC)
PM: Syncing filesystems ... done.

[abhishek srivastav]

Hey ,

You can solve this by two approaches

- First, you can disable/change this sleep time for settings.

-Second,

I guess you are booting your android from MMC card, and once it goes to sleep mode it may not be able to remount the MMC card while waking up. I faced a similar issue when I ported Android on OMAP3530. All I did was, modified the power.c in case of 2.6.27 Kernel. Please try similar stuffs in your Kernel, I guess you should be able to solve this. ATB

Regards,

Abhishek 

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[Aneesh Bhasin]

Hi Sriram,

On Sat, Nov 21, 2009 at 10:07 PM, Sriram V <vshr...@gmail.com> wrote:
>
> Hi,
>   I am trying to test pm on a custom board with android.

What android version are you usnig ?

>
>   Whats happening:
>    1) Android is putting the system to sleep - calling system wide suspend
>    2) During suspend, kernel resume immediately - I get "wakeup wake lock: omap-8250-serial". and again puts it back to suspend.
>    3) This keeps happening, There is no serial activity except for printing the messages (transmission from the board) - No serial inputs from the host pc.
>    4) Is there any way to disable this?

We encountered a similar problem while booting android on one of our
board. One way is to acquire a partial wake lock (or just a wakelock
in the newer versions of android) as soon as you boot up the board.
In older android version, the way was :
echo wakelock1 > /sys/android_power/acquire_partial_wake_lock
or on newer versions :
echo wakelock1 > /sys/power/wake_lock
Please check the path as I do not have access to the board right now.

Acquiring the wake lock will prevent your system from going into
sleep. However, this is a temporary solution as you still need to
figure out why is your device not able to go to sleep.

Hope that helps...

Regards,
Aneesh

[Aneesh Bhasin]

Hi Sriram

<reposting - forgot to add linux-pm to senders' list>

On Sat, Nov 21, 2009 at 10:07 PM, Sriram V <vshr...@gmail.com> wrote:

> Hi,
>   I am trying to test pm on a custom board with android.

What android version are you usnig ?

>   Whats happening:
>    1) Android is putting the system to sleep - calling system wide suspend
>    2) During suspend, kernel resume immediately - I get "wakeup wake lock:
> omap-8250-serial". and again puts it back to suspend.
>    3) This keeps happening, There is no serial activity except for printing
> the messages (transmission from the board) - No serial inputs from the host
> pc.
>    4) Is there any way to disable this?
>