On Mon, 3 Oct 2011 21:14:52 +0200 Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> wrote: > Hello John, > > 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 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". > Can you please test the following two things: > > - Can you reproduce with the kernel parameter: > > maxcpus=1 Aha! When booted this way, I can't reproduce the problem. Suspend works. > ? > - Does onlining/offlining of the 2nd cpu work reliably? That is: > > echo 0 > /sys/devices/system/cpu/cpu1/online > echo 1 > /sys/devices/system/cpu/cpu1/online I can successfully execute those commands without error, but as my laptop has only one cpu, I'm not sure what that means. > Best regards > Uwe > > -- > Pengutronix e.K. | Uwe > Kleine-König | Industrial Linux Solutions > | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
