Hi. I'm running a RedHat system with the 2.2.14 kernel from kernel.org, and this problem has cropped up with several of the 2.3-to-2.2.14 USB backports including the 2.3.99-pre7. I have a PCI USB controller with 2 ports on it, and if I plug a pair of USB speakers into each port it works great and I can drive them independently. However, if I plug a hub into one port and plug both speaker pairs into that hub, then attempts to access the second speaker (/dev/dsp1) cause the system to freeze completely. It can only be recovered by power-cycling and the logs show nothing. I've heard a rumor that this is a problem integral to USB, not specific to the Linux drivers, but I have no confirmation of this. Can anyone shed some light on the matter? Even a simple "you can't do that with USB" would at least give me justification to pursue other solutions (we were hoping to use the machine as a sound server for 6-10 speakers; can go with a National Instruments DAC card if we must). Here's the lsmod, if it helps: Module Size Used by mousedev 2660 1 usbmouse 816 0 (unused) input 1496 1 [mousedev usbmouse] audio 33324 0 (unused) usb-ohci 10172 0 (unused) usbcore 22276 0 [usbmouse audio usb-ohci] (also using a USB mouse, however the problem seems to be independent of the presence of the mouse) Thanks for any help, David Covin lab programmer, Margoliash Lab, University of Chicago [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
