Messages in this thread | | | Date | Wed, 12 Sep 2007 02:12:48 -0700 | From | Andrew Morton <> | Subject | Re: clockevents: fix resume logic |
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On Tue, 11 Sep 2007 21:52:01 +0200 Thomas Gleixner <tglx@linutronix.de> wrote:
> On Tue, 2007-09-11 at 11:44 -0700, Andrew Morton wrote: > > > > there doesn't seem to be a lot of difference in the time handling, except > > > > there are large changes in when things happen in the bootup sequence. > > > > > > The question is whether the system goes into C2 with the patch applied. > > > > > > Can you please provide the output of /proc/acpi/processor/CPU0/power for > > > both the bad and the good one ? > > > > > > > good: > > > > sony:/home/akpm> cat /proc/acpi/processor/CPU0/power > > active state: C0 > > max_cstate: C8 > > bus master activity: 00000000 > > maximum allowed latency: 8000 usec > > states: > > C1: type[C1] promotion[--] demotion[--] latency[001] usage[00000000] duration[00000000000000000000] > > C2: type[C2] promotion[--] demotion[--] latency[001] usage[00000000] duration[00000000000000000000] > > > > bad: > > > > sony:/home/akpm> cat /proc/acpi/processor/CPU0/power > > active state: C2 > > max_cstate: C8 > > bus master activity: 00000000 > > maximum allowed latency: 8000 usec > > states: > > C1: type[C1] promotion[C2] demotion[--] latency[001] usage[00000010] duration[00000000000000000000] > > *C2: type[C2] promotion[--] demotion[C1] latency[001] usage[00008316] duration[00000000000170717293] > > Ok, here we are. The bad one uses C2 which stops the local apic on the > VAIO. I suspect we end up in the suspend/resume with going into C2 > without the broadcast active. > > Can you try to get the output of SysRq-Q during the "it needs help from > keyboard" period ? >
That's a bit tricky because hitting the keyboard is what unsticks things. And the video is black after resume-from-RAM (has always been thus) and we broke netconsole-over-e100-during-resume back in 2.6.21 or thereabouts.
<struggles a bit>
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