On Wed, Aug 01, 2007 at 08:36:20PM +0200, Oliver Neukum wrote:
Am Mittwoch 01 August 2007 schrieb Andreas Jaeger:
Playing with powertop, I got the following suggestion:
Suggestion: Enable the CONFIG_USB_SUSPEND kernel configuration option. This option will automatically disable UHCI USB when not in use, and may save approximately 1 Watt of power.
Is this something we should do in our kernel? Or what is the risk for this? Will it break automatic access to hot-pluggable devices?
It will _not_ break hotplug. But it'll break all non-compliant devices unless they are in the list list of quirky devices.However, we know that list is incomplete. But we don't know how incomplete. As a compromise, we might change the default to enable it only for devices with drivers in the kernel. That would be a kind of whitelist.
Yeah, I'm a bit leary of adding this to our kernel just yet, it's still not quite stable on all devices because other operating systems do not do this and hence, a lot of devices are broken with it :( So far, the majority seem to be scanners and some printers. thanks, greg k-h -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-kernel+help@opensuse.org