On 10/20/09, Andrey Rahmatullin <wrar@xxxxxxxxxxxx> wrote: > On Fri, Oct 16, 2009 at 10:22:47PM +0200, Corentin Chary wrote: >> Switching the camera takes 500ms, checking if it's on is almost free... > So if I don't want camera to be enabled, I should wait 500ms on boot to > enable it and then other 500ms to disable? 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. So the question is why do you want to disable it? Have you measured the power consumption on the current kernel using a more comprehensive method than powertop? 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. Regards Alan -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
