On Tue, Jul 16, 2013 at 08:23:33PM +0200, Ortwin Glück wrote: > Without NetworkManager, no X, on console and with plain jane wpa_supplicant I do > echo mem > /sys/power state > > After that, it still responds to keyboard events: I can switch VT > and type on the consoles, but I can not login on a different VT > (pressing Enter after the username doesn't return). So I guess tasks > have been frozen, but it hangs in stopping devices. > > settings for pm_test: > devices: same behviour as above > freezer: works as expected (stops tasks; sleeps; resumes tasks) > > Nothing in the logs. How can I enable more log? This looks like livelock, i.e. kernel wait for mutex to be released but that never happen , for example because of deadlock. Enabling CONFIG_LOCKDEP=y could help to diagnose this. Other than that sysreq key w (show blocked task) could help, see Documentation/sysrq.txt for instructions how to use this key. Also please remember set no_console_suspend boot option to allow print messages on tty during suspend. Stanislaw -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
