On Tue, Oct 20, 2009 at 10:04:04AM +0100, Alan Jenkins wrote: > Yup. The original patch from Pekka was accepted alongside a patch > which enabled auto-suspend for the uvcvideo driver by default. This > was shown to have the same effect on CPU wakeups as measured by > powertop. When the camera is enabled, powertop says "device is active 100% of time". That was enough for me :) > Have you measured the power consumption on the current kernel using a > more comprehensive method than powertop? No. > Or perhaps you have a different camera chip? Have you tried enabling > auto-suspend manually? If it works, perhaps that driver can enable > auto-suspend as well. /sys/module/usbcore/parameters/autosuspend and /sys/devices/pci0000:00/0000:00:1d.7/usb5/5-8/power/autosuspend both contain 1, but powertop still suggests adding usbcore.autosuspend=1. Though nothing related to USB exists in wakeup causes list. -- WBR, wRAR (ALT Linux Team)
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