On Fri, Sep 30, 2011 at 01:01:28AM +1000, johnohagan wrote:

Running Debian testing on an HP Mini 5102 with non-RT kernel, suspend
to ram, suspend to disk and resume work as expected. With the RT
kernels from both testing and Sid, attempting to suspend may result in

For the people not running Debian:

	wheezy aka testing currently has 3.0.2 + 3.0.1-rt11
	sid aka unstable currently has 3.0.4-rt14

a lock-up, with a blank screen and high fan operation. Keyboard and
Sysrq keys are unresponsive and a hard shutdown is necessary. This
happens randomly AFAIKT, of the order of half the time, possibly more
often if larger programs are running, but still occurs in single-user
mode.

I ran the tests using /sys/power/pm_test described here:
https://raw.github.com/torvalds/linux/master/Documentation/power/basic-pm-debugging.txt

The freeze occurs with pm_test set to "processors", but not with "platform". 

With "single no_console_suspend" on the kernel command-line and trying
STD, the screen messages are normal up to the point of saving the
image, and remain there after the freeze. For STR the screen is blank
when the freeze happens.

There is one tainted module on my system, brcmsmac, which I
blacklisted for the testing.

I've submitted this as Debian bug #643301, and am sending this summary
here on the advice of Debian maintainers.

I asked for a kernel log on a serial console (don't know if that is
possible for John to provide). If you have other tips to debug that ...

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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