On Sun, Jun 10, 2001 at 11:56:25AM +0200, Michel Lanners wrote: > On my TiBook, BenH' 2.4.5-pre kernel reprobes all ADB devices after > wakeup. This, I think, is not new; what's changed is the fact that the > rescan is not done inline in the wakeup code path, but rather a kernel > thread is started that does the probe. Wakeup is faster, since we don't > block on the ADB probe.
Right. And pmud currently is expecting the old behavior, ie when it's called things have been set up. Sound right? > Which in turn means that it is now possible for other post-wakeup code > to be run _before_ the ADB probe task is through with the bus fiddling. > I guess that's what Tom's hitting here. Right. > > I don't think the kernel 'resets' the device, it justs initiates a bus > > reset and that brings all devices to the powerup defaults. > > Probably the ADB bus is powered down during sleep; so you need to > restart it from scratch after wakeup-- no different than at system > startup. Which means that in a perfect world, there should be a way for > the kernel to ask for configuration after ADB is up; be it at system > startup or after wakeup. You mean sort of like calling /sbin/hotplug when we have a 'new' ADB device? > By the way, Tom, how are you configuring the trackpad on boot? By hand right now. I was almost thinking of making a small init.d script and reading from /etc/defaults/trackpad or something like that... -- Tom Rini (TR1265) http://gate.crashing.org/~trini/
