On Tue, Feb 22, 2011 at 08:21:48PM +0000, Dennis den Brok wrote: > Kenneth R Westerback <[email protected]> write: > > Are there powered/unpowered hubs involved? This sounds like marginal power > > might be a culprit. i.e. more power would resolve it. As it does most > > things. :-) > > Well, the devices are connected to the motherboard's ports on the > back, which I think should be full power. NetBSD seemed to work > fine for months on the same machine (although on very rare occasions, > it disabled ports due to "device problems", but this happened on > various machines with various USB devices, so I used to suspect a > software problem).
it does seem to be that the hub has disabled a port. that is done by the usb stack when the "disabling port" message appears. but that only happens when trying to attach a device, and I don't see any other code that's intentionally disabling ports. and afaics, the only times the usb stack does anything to ports is when a device is attached or detached. I wish I could at least give some ideas about how to debug this, but I'm basically without any ideas right now. sorry. I'll keep thinking about it. -- [email protected] SDF Public Access UNIX System - http://sdf.lonestar.org
