On Tue, 19 Jun 2007, Paul Walmsley wrote: > On Tue, 19 Jun 2007, Oliver Neukum wrote: > > > Am Dienstag, 19. Juni 2007 schrieb Chuck Ebbert: > > > >> Try disabling CONFIG_USB_SUSPEND > >> > >> [usb developers: what are the drawbacks of doing this?] > > > > Increased power consumption. > > speaking of CONFIG_USB_SUSPEND, I've encountered at least one device -- a > Canon EOS 5D camera -- that, after the bus suspends, must be powercycled > in order to return the camera's interrupt endpoints to a functional state. > How are these types of problems handled, currently? Is this something for > a blacklist?
There are a few possible approaches. One is indeed a blacklist, to prevent the camera from automatically being suspended. Another is to prevent it by changing a device parameter in sysfs. Note that neither of these will help if you do a suspend-to-RAM. That suspends everything. Alan Stern - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/