On Sunday, 9 September 2007 02:29, Andrew Morton wrote: > On Sat, 8 Sep 2007 09:29:18 -0700 (PDT) bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote: > > > http://bugzilla.kernel.org/show_bug.cgi?id=8995 > > > > Summary: /proc/acpi/alarm worked; update to 2.6.22.2 and > > /sys/class/rtc/rtc0/wakealarm don't > > Product: ACPI > > Version: 2.5 > > KernelVersion: 2.6.22.2 > > Platform: All > > OS/Version: Linux > > Tree: Mainline > > Status: NEW > > Severity: normal > > Priority: P1 > > Component: Power-Sleep-Wake > > AssignedTo: acpi_power-sleep-wake@xxxxxxxxxxxxxxxxxxxx > > ReportedBy: huffcslists@xxxxxxxxx > > > > > > Most recent kernel where this bug did not occur:2.6.20 > > Distribution: FC6 > > Hardware Environment: ASUS A8N-SLI mobo, Athlon 64 3200+, PATA Disk > > Software Environment: FC6, MythTV 0.20.2-164 > > Problem Description: > > Change in kernel code from support for /proc/acpi/alarm to > > /sys/class/rtc/rtc0/wakealarm and supporting code borked working system. Will > > no longer wake at set time. > > Time set <> time reported by cat /sys.../wakealarm. Return value off by large > > constant. Note: Mobo doesn't support month, day, or year in alarm setting. > > > > Steps to reproduce: > > Before upgrade from 2.6.20 to 2.6.22.2, suspend-to-disk with powerdown to > > standby would wake at time echoed into /proc/acpi/alarm. Change of wakeup time > > setting code to echo 0 to /sys/class/rtc/rtc0/wakealarm followed by echo of > > seconds since epoch of desired wakeup time under 2.6.22.2 does not work. > > System will not wake up at specified time. Will wake by keyboard keystroke, > > such as Ctrl+Esc. Tried enabling APM (BIOS) alarm setting and all entries > > under /proc/acpi/wakeup (all on at once), but no improvement. > > Test sequence: > > # echo 0 > /sys/class/rtc/rtc0/wakealarm > > # t=`date +%s`; w=`expr $t + 60`; echo $w > /sys/class/rtc/rtc0/wakealarm > > # echo $w > > 1189268800 > > # cat /sys/class/rtc/rtc0/wakealarm > > 2076101696 > > # expr 2076101696 - 1189268800 > > 886832896 > > <invoke your favorite code to suspend to disk and power down system leaving > > standby power on> > > <wait> > > <wait some more> > > <hit power on button> > > > > Guys, can we please work out where the problem lies here? Is it in the > new RTC code, ACPI or what? I think the suspend/hibernation code ordering changes after 2.6.20 are to blame here. Reportedly, the problem can be fixed by applying the patch from http://lkml.org/lkml/2007/8/27/392 , but that requires some other changes which are not present in 2.6.22. It would be nice if that could be tested on 2.6.23-rc5 with the patchset from http://www.sisk.pl/kernel/hibernation_and_suspend/2.6.23-rc5/patches/ applied and the patch from http://lkml.org/lkml/2007/8/27/392 on top of it. Greetings, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
