Hello there, On Mon, 15 Mar 2004, Marius Schaefer/Camberg/ISBAC wrote: > I have some problems with my USB ports of an embedded VIA TwisterT VT8606 > based system. I tried kernel 2.4.25 and 2.6.4 with UHCI, OHCI and EHCI. > Only UHCI detects my usb controller, which should be ok for a via chipset.
You haven't sent much information, so I'm guessing a bit. Next time, please read the FAQ and send the information it asks for. I've seen reports that usb-uhci can sometimes work better than uhci. I don't know which one you're using, but whichever it is you might want to try the other one. > But then I get lots of messages like "hub 2-0:1.0: connect-debounce failed, > port 1 disabled" and it doesn't detect any usb devices. lspci says: "USB > Controller: VIA Technologies, Inc. USB (rev 1a)". There have been problems with VIA chipsets but I don't know if that particular one has fared any better or any worse than any other. > Is this a well known problem of this chipset or are there any patches > available? Some improvements have been made recently for VIA in particular, but I don't think we're all the way there yet. Check the kernel changelogs, the USB drivers are in the vanilla kernel sources. I don't think the debounce failure is especially a VIA problem, if you Google for "usb-uhci" uhci "debounce failed" you will find at least a hundred references. If you can't get any improvement with different modules (are you using modules?), you could try plugging in the devices first and only then loading the modules which may eliminate the debounce problem. Then again it may not... I don't know what a Twister system is, if it can take plug-in cards or similar you might try one that provides USB hubs from a different manufacturer. 73, Ged. ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
