Messages in this thread | | | Date | Tue, 5 Apr 2005 14:56:20 -0400 (EDT) | From | Shawn Starr <> | Subject | Re: [2.6.12-rc1][ACPI][suspend] /proc/acpi/sleep vs /sys/power/state issue - 'standby' on a laptop |
| |
I'm working o
--- Pavel Machek <pavel@ucw.cz> wrote: > Hi! > > > I've noticed something strange with issuing > 'standby' to the system: > > > > when echoing "standby" to /sys/power/state, > nothing happens, not even a log or > > system activity to attempt standby mode. > > > > However, trying echo "1" to /proc/acpi/sleep the > system attempts to (standby) > > and aborts: > > > > [4295945.236000] PM: Preparing system for suspend > > [4295946.270000] Stopping tasks: > > > =============================================================================| > > [4295946.370000] Restarting tasks... done > > > > We get no reason as to why it quickly aborts. > > > [4294672.065000] ACPI: CPU0 (power states: C1[C1] > C2[C2] C3[C3]) > > [4294676.827000] ACPI: (supports S0 S3 S4 S5) > > > ...aha, but your system does not support S1 aka > standby. >
Right, so nothing should happen if I try to do it, but something does only in /proc/acpi/sleep does the system attempt S1 which is not supported.
Do you know if /proc/acpi/sleep will be deprecated in favour of /sys/power/state? If so, this thread will be moot ;)
> > What is '1' in /proc/acpi/sleep? standby mode is > not the same as suspend to > > ram? when I put a normal desktop in standby mode > its still 'on' but the hard > > disk is put to sleep and the system runs in a > lower power mode. > > stanby != suspend to ram.
Correct, I wanted to be sure.
> > Pavel > -- > 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 > time=448769.1 ms > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |