On 01/05/2012 09:58 AM, Norbert van Bolhuis wrote: > thanks for your response. > > not setting MSR_POW gives same result.
OK, so you're not getting an interrupt regardless of low-power state. Check whether the interrupt is getting masked during standby preparation. Does the interrupt handler run when you're not trying to enter standby? > if I set kernel.powersave-nap=1 it works fine, What is "it"? Do you mean that powersave-nap doesn't break things, or that standby works when you specify that? > so apparently NAP/DOZE mode does work (if CPU is idle). This saves almost no > power though. Standby mode saves about 300-500 mW. > > The problem could well be our board though, today I learned it does > work by connecting an (inactive) JTAG debugger. > Also, on another board it always works. You mean connecting a JTAG but not doing anything with it made wake-from-standby work? There was a bug like that on early revisions of the mpc8313erdb board -- though in that case if you had a bad board the system would hang whenever you access any PMC register. I'm not sure what the mechanism of failure was; IIRC the fix was adding a resistor. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
