Messages in this thread |  | | | From | Ferenc Wagner <> | | Subject | Re: [linux-pm] intermittent suspend problem again | | Date | Wed, 18 Nov 2009 15:05:47 +0100 |
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Ferenc Wagner <wferi@niif.hu> writes:
> Since I've instrumented s2disk and the hibernation path, no freeze > happened during hibernating the machine.
Not until I removed the delays from hibernation_platform_enter(), which were put there previously to get step-by-step feedback. Removing them again resulted in a freeze in short course, maybe just two hibernations later. The instrumentation shows it stuck in dpm_suspend_start(PMSG_HIBERNATE). Does it mean that some device driver is at fault? I'll check if it always fails at the same point (although tracing into dpm_suspend_start isn't pure fun because of the multitude of devices it loops over). Is there any way to get printk output from that phase?
Side question: If I run s2disk from the init=/bin/bash prompt, the instrumentation in acpi_enter_sleep_state_prep in drivers/acpi/acpica/hwsleep.c fires before the "Snapshotting system" phase, but it does not fire if I hibernate from the full running desktop. (That instrumentation was put there to investigate the KMS-triggered STR freeze.) What could explain this? -- Thanks, Feri.
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