2.6.29 PM and CPUIDLE

[Jean Pihet <jpihet@mvista.com>]

Hi,

I am having problems using CPUIDLE PM_SLEEP on Beagleboard with the latest pm 
tree.
It looks like CPUIDLE prevents the system to go into retention mode, while it 
works fine without CPUIDLE enabled:

root@beagleboard:~# echo 1 > /sys/power/clocks_off_while_idle
root@beagleboard:~# echo mem > /sys/power/state
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.02 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
omapfb omapfb: timeout waiting for FRAME DONE
Powerdomain (core_pwrdm) didn't enter target state 1
Powerdomain (dss_pwrdm) didn't enter target state 1
Could not enter target state in pm_suspend
Restarting tasks ... done.

The registers dump shows the next power state in PM_PWSTCTRL is set to ON 
instead of RET for MPU and CORE. Furthermore DSS is not reaching RET (stays 
ON).

Are the CPUIDLE and suspend/resume features compatible with each other? Am I 
missing something, e.g. a way to change the behavior from /sys?

Regards,
Jean