On 1/12/07, Alan Stern <[EMAIL PROTECTED]> wrote: > 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.
I'll do one more test. I don't think I powered on with the device in a hub standalone and the drivers disabled, and then modprobe'd them in. > > 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. But usbreset works and that should take the same power level or more. > > > 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 > > -- Jon Smirl [EMAIL PROTECTED] ------------------------------------------------------------------------- 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
