Hello, I am working with Fedora Core 2 and the regular (not fast) usbdux controller. We recently upgraded our Dell 2650 machine from RH 9.0 (kernel 2.4) to Fedora Core 2, kernel 2.6.10-1.771_FC2smp. The usb-dux controller worked great on our old kernel, but the new kernel has the following problem. We installed comedi and comedilib according to the instructions on http://www.linux-usb-daq.co.uk/drivers2/2.6/. There were no errors on installation, and the usbdux drivers were auto-detected by hotplug when the usbdux controller was plugged in. We saw the message "kernel: comedi0: usbdux: usb-device 0 is attached to comedi." However, when we run the demo programs or our old programs, we always get errno 110. The accompanying error message is something like "kernel: comedi0: could not transmit dux_command to the usb-device", or "kernel: usb1-1: lt-info timed out on ep4out". dmesg, lsmod, and /proc/comedi output files are attached. I'm very confused, since the device registered just fine with the usb-hotplug, so it must be talking. Can someone please explain this error and offer suggestions to resolve it? Linux linux1 2.6.10-1.771_FC2smp #1 SMP Mon Mar 28 01:10:51 EST 2005 i686 i686 i386 GNU/Linux comedilib-0.7.22 comedi-0.7.69 Thanks in advance, Melanie