On Sat, Oct 31, 2009 at 9:34 AM, Daniel Mack [off-list ref] wrote:

Is anyone using suspend/resume with a recent git mainline kernel on PXA
or other ARM embedded boards? My platform used to suspend and resume
just fine on 2.6.31 but now as I rebased it, it fails the resume part.

Unfortunately, I can't bisect it as the platform is not mainline yet and
so I always have mandatory patches (without my platform won't do
anything) on top of the git repository. Which breaks the bisect logic.

What puzzles me is that I see the current raising at wakeup time, so at
least the processor seems to resume, but I can't see any serial console
output, just like if the kernel crashed very early after wakeup.
'no_console_suspend' didn't help either.

That will be very difficult to debug then. There are not many changes to
the suspend/resume as I can recall since 2.6.31. One suggestion if
you want to debug this is - add a dead loop at the suspicious place,
and see if you JTAG debugger can connect at that time - and of course
the PC is pointing to that dead loop to identify the point it can reach.

Does anyone use that successfully? Any idea for possible regressions?

Daniel


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