On Wed, May 11, 2016 at 08:44:45AM -0400, Steven Rostedt wrote: > On Wed, 11 May 2016 15:21:16 +0300 > Ville Syrjälä <[email protected]> wrote: > > > Yeah can't get anything from the machine at that point. netconsole > > didn't help either, and no serial on this machine. And IIRC I've > > tried ramoops on this thing in the past but unfortunately the memory > > got cleared on reboot. > > > > Can you look at the documentation in the kernel code at > > Documentation/power/basic-pm-debugging.txt And follow the procedures > for testing suspend to RAM (although it requires mostly running the > same tests as for hibernation suspending). > > You can also use the tool s2ram for this as well. > > See Documentation/power/s2ram.txt > > Perhaps this can give us a bit more light onto the problem. > > Basically the above does partial suspend and resume, and can pinpoint > problem areas down to a more select location.
All the pm_test modes work fine. The only difference between them was that 'platform' required me to manually wake up the machine (hitting a key was sufficient), whereas the others woke up without help. pm_trace gave me [ 1.306633] Magic number: 0:185:178 [ 1.322880] hash matches ../drivers/base/power/main.c:1070 [ 1.339270] acpi device:0e: hash matches [ 1.355414] platform: hash matches which is the TRACE_SUSPEND in __device_suspend_noirq(), so no help there. I guess I could try to sprinkle more TRACE_RESUMEs around into some early resume code. If anyone has good ideas where to put them it might speed things up a bit. -- Ville Syrjälä Intel OTC
