Messages in this thread |  | | Date | Mon, 8 Jun 2009 00:28:58 +0100 | From | Matthew Garrett <> | Subject | Re: [PATCH] eeepc-laptop: enable camera by default |
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On Sun, Jun 07, 2009 at 04:41:30PM +0100, Alan Jenkins wrote:
> Hmm, some cameras have input devices (i.e. buttons). In fact, uvcvideo > registers an input device on my EEE even though it has no buttons. I > think that needs investigating :-(. > > It's quite likely that the buttons can stop working when suspended. > And there might be other devices with the same IDs, which have a > button wired up.
A change has recently been committed that results in the button only working if the v4l device is open. Otherwise you've got several wakeups a second due to the polling of the button endpoint. I'm assuming that opening the device disables autosuspend, so I wouldn't worry about that.
It'd be interesting to try enabling autosuspend on all UVC devices. Can a driver indicate that its hardware supports it? -- Matthew Garrett | mjg59@srcf.ucam.org
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