Thomas Thanner wrote: > Hello alltogether, > > I have encountered an interesting issue when using a low-speed USB mouse > over a hi-speed USB 2.0 hub. > > My setup is the following: > > +-------------+ +-------------+ +-------+ > | Motherboard |<-->| USB 2.0 Hub |<-->| Mouse | > +-------------+ +-------------+ +-------+ > > Motherboard is a Supermicro X6DH3-G2 with dual XEON 3GHz. > USB 2.0 Hub is a Philips ISP1520 > Mouse is a general purpose optical USB mouse made by Logitec. > Kernel is a 2.6.11 with SMP support enabled. > > UHCI driver is compiled directly into kernel. EHCI driver is modular. > > When mouse is moved during boot, boot process stops when the UHCI driver > gets initialized. > > When UHCI driver is compiled as a module, everything works fine. > > Has anyone an explanation for this interesting behaviour? > > Thomas
What else is plugged into the USB 2.0 Hub? The Philips ISP1520 only has a single Transaction Translator (TT) that shares between all devices on the hub. Other hubs on the market that have one TT per port seem to have less problems. A lot of USB code has changed since 2.6.11 .. Try 2.6.16 --- Karl Hiramoto <[EMAIL PROTECTED]> http://karl.hiramoto.org/ ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
