On Thu, 13 Dec 2007 17:58:37 +0100 "Rafael J. Wysocki" <rjw@xxxxxxx> wrote: > On Thursday, 13 of December 2007, Andrew Morton wrote: > > On Fri, 21 Sep 2007 15:37:40 -0400 (EDT) Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > > > > This patch (as994) reorganizes the way suspend and resume > > > notifications are sent to drivers. The major changes are that now the > > > PM core acquires every device semaphore before calling the methods, > > > and calls to device_add() during suspends will fail. > > > > Causes my t61p to deadlock during suspend-to-RAM. Really late - the little > > moon symbol has started to flash but the LCD is still powered and the > > cursor still blinks. Only a poweroff restores control. > > Most probably, one of the drivers or a CPU hotplug notifier unregisters a > device during suspend (wrong). Not much is coming out over netconsole. Disabling netconsole doesn't work around this bug. > Please boot with no_console_suspend and check if the box survives (with this > patch applied): > > # echo 8 > /proc/sys/kernel/printk > # echo processors > /sys/power/pm_test > # echo mem > /sys/power/state http://userweb.kernel.org/~akpm/pc131696.jpg It hangs in the same way. > If it doesn't, you can try > > # echo platform > /sys/power/pm_test > # echo mem > /sys/power/state It gets here: http://userweb.kernel.org/~akpm/pc131697.jpg then locks up. > and > > # echo devices > /sys/power/pm_test > # echo mem > /sys/power/state It gets here: http://userweb.kernel.org/~akpm/pc131698.jpg then locks up. I spent a bit of time ding crude debugging hacks but ran out of patience.. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
