Hi, Now, i am able to bring linux out of suspend. The problem was to do with the mmc card detection. With out card detection, The kernel used to hang when i tried to bring linux out of suspend. The below works, if i boot out of NFS and mount sdmmc and do a $ echo -n mem > /sys/power/state However, If i boot out of SDMMC (rootfs on sdmmc). I am not able to bring it out of suspend. The kernel hangs. I get the message: # echo -n mem > /sys/power/state PM: Syncing filesystems ... done. Freezing user space processes ... (elapsed 0.00 seconds) done. Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done. mmc0: card e624 removed --- kernel hangs--- Regards, sriram On Wed, Dec 31, 2008 at 11:53 AM, Len Brown <lenb@xxxxxxxxxx> wrote: > > > > > On Wed, 31 Dec 2008, Sriram V wrote: > >> Hi, >> I am trying to test pm on my platform/board. >> I am using the latest linux kernel - 2.6.28-rc6 >> PM Support exists in my mmc driver and suspend and resume work fine. >> >> With rootfs mounted via NFS. I am able to do >> $ echo -n mem > /sys/power/state >> >> The above works. It successfully calls suspend and resume of sdmmc driver. >> >> However, the same does not work if i have mounted the SDMMC card >> with rootfs on NFS. >> >> The kernel hangs, when i try to do >> $ echo -n mem > /sys/power/state >> >> In this case suspend and resume functions of the driver are not called >> at all. (I gave a couple of debug prints at the beginning of suspend and resume >> and they didnot get print) >> >> Same behaviour is observed when i boot out of SDMMC card. Suspend/Resume >> dont work. The kernel hangs. >> >> I get the messages in both case when i suspend-to-ram. >> >> 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) >> >> >> I am not sure if this has to do with SD/MMC driver or something else. > > What do you seen when you boot with "no_console_suspend" > > You may also want to check out > Documentation/power/basic-pm-debugging.txt" > > cheers, > -- Len Brown, Intel Open Source Technology Center > > > _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
