Messages in this thread | | | Date | Tue, 30 Jan 2007 19:43:22 +0100 | From | Eric Piel <> | Subject | Re: [PATCH] Fix /sys/device/.../power/state regression |
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01/27/2007 02:17 PM, Pavel Machek wrote/a écrit: > Hi! > >> In 2.6.19, support for splitting driver suspend and resume callbacks >> into interrupt and non-interrupt contexts was added. Unfortunately, this >> broke /sys/device/.../power/state support for all devices. In the long >> run, this should be obsoleted by power management support in the >> individual drivers - however, in the case of network drivers (for >> example), currently only three drivers implement any sort of useful >> run-time power management. > > Well... solution seems to be 'implement useful pm for more drivers' > not 'discourage people from doing so by re-enabling broken interface'. > >> --- a/Documentation/feature-removal-schedule.txt >> +++ b/Documentation/feature-removal-schedule.txt >> @@ -9,7 +9,8 @@ be removed from this file. >> What: /sys/devices/.../power/state >> dev->power.power_state >> dpm_runtime_{suspend,resume)() >> -When: July 2007 >> + bus->pm_has_noirq_stage() >> +When: Once alternative functionality has been implemented > > .../power/state never worked properly. You have been warned and it is > going to be removed. It oopses kernels... while 'only' providing power > savings. If you are interested in power savings, please help doing > them right.
Hi, I realize that I'm arriving just far too late on this thread to bring any meaning, so that's just for the info...
I have been using this interface for a _long_ time (before june 2005, cf http://marc.theaimsgroup.com/?l=linux-usb-devel&m=111869558800526&w=2) and for different things than power saving: I can turn off my (usb) optical mouse when watching a movie or going to bed.
Is there any hardware independent alternative to turn off USB devices?
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