On Fri, 12 Jan 2007, Jon Smirl wrote: > Using 2.6.20-rc4 on a system with an ICH4, it fails the same way as > the device did on the ICH5. This is starting to point to a broken > resume capability in the device. I have more systems around but they > are all ICH4/5. > > So why does the device work when plugged into a powered hub? Do the > ports on the powered hub not do suspend/resume?
I doubt that. Besides, even if they don't the root ports certainly do. Once the root hub suspends the external hub, the device will be suspended along with it. It could be a power-level issue. The external powered hub may provide a higher voltage or more current than the root port, and the device may need that little bit extra in order to resume. > This device is a desktop USB audio device and was not designed for > portable use. It could be that Philips just never implemented/tested > suspend/resume on it. Could be. Or maybe they tested it with a powered hub. > Is there a way to force USB suspend/resume under Windows as a comparison? I don't know. A Linux-oriented mailing list isn't the best place to get information about Windows. :-) Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
