What do you mean by *fails*? Do you have an error log or your device refuses to wake up and seems to have crashed?
When suspend/resume *crashes* your device, it is most likely coming from a driver, not a task. And because we are on android-kernel mailing-list, I will give you a kernel answer :-) USB will be disabled when your device enters suspend. So ADB won't help in such a case. You need an UART connection. Problem here is that UART is disabled when entering suspend. Fortunately, you can add no_console_suspend=1 to your kernel command line to have your console active while suspended. Then enable printks for power/suspend.c or some other related files. And you'll be able to see on the console what happens. Search for PM_SUSPEND_DEBUG compile switch. And have a look to power stuff in kernel documentation. Emeric On Fri, Jul 19, 2013 at 9:51 AM, Anirudh Gargi <anirudhga...@gmail.com>wrote: > Doing a dmesg or cat /proc/kmsg over adb after few seconds (considering no > screen task is there) after screen has hit off (this is called ealy > suspend). > Note : you will not hit suspend if you connected over adb (usb is active) > so connect after suspend might have hit and got failed. > Check for the last log print that says wakelock or similar xxxlockxx > (wakelock variable name)... > Usually its a wakelock (type of software lock, so long a process is > holding it system dosent hit suspend) which stops from suspend. > > A common kernel log print indicating last prints of suspend is like > "freezing ......'. So look for anyting just above it which says suspend > fail , wake lock etc.. > > > On Thursday, July 18, 2013 11:22:07 PM UTC+5:30, ngujason wrote: >> >> Hi, >> >> Is there a way to find out which task (or related information) when >> system suspend/resume fails? >> >> Thanks. >> > -- > -- > unsubscribe: android-kernel+unsubscr...@googlegroups.com > website: http://groups.google.com/group/android-kernel > --- > You received this message because you are subscribed to the Google Groups > "Android Linux Kernel Development" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to android-kernel+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel --- You received this message because you are subscribed to the Google Groups "Android Linux Kernel Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-kernel+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
