Messages in this thread |  | | From | Ferenc Wagner <> | | Subject | Re: [linux-pm] intermittent suspend problem again | | Date | Thu, 19 Nov 2009 13:00:00 +0100 |
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Ferenc Wagner <wferi@niif.hu> writes:
> "Rafael J. Wysocki" <rjw@sisk.pl> writes: > >> On Wednesday 18 November 2009, Ferenc Wagner wrote: >> >>> Ferenc Wagner <wferi@niif.hu> writes: >>> >>> 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? >> >> It looks like it uses the "shutdown" method when run with init=/bin/bash, but >> I don't know why exactly. > > Thanks for the tip, I'll check this too.
While looking into this, I found a reproducible kernel panic:
1. boot with init=/bin/bash 2. mount /usr; swapon -a 3. plug in a USB pendrive 4. s2disk (machine goes to sleep) 5. power on, proceed with resuming, press Enter to cancel resume pause 6. ACPI: Hardware changed while hibernated, cannot resume! Kernel panic - not syncing: ACPI S4 hardware signature mismatch
Does it make sense? -- Thanks, Feri.
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