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 ? - 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 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
