Hi! Did anyone managed to get active extension cables work with Linux? I do have one to achieve long distance between the workplace and the computer itself (about 10 meters). It's mostly a cable with a hub attached to it, though only the electric part the hub - it repeats the signals, but doesn't behave as an USB device, it is completely transparent. The problem is that any device connected to the cable isn't identified at powerup, only when I plug the cable out and back in after power up. No errors are printed, no warnings. Just as if the cable wasn't plugged in. This is the same when the cable is plugged into a root hub or a hub connected to the root hub. After unplugging and replugging the cable after powerup everything works fine until the hub which the cable is connected to is unplugged from the root hub. Happens both with UHCI and OHCI. Reportedly doesn't happen with Windows.
If the above paragraph is too confusing, here is a graphical description of the problem: 1) PC switched off, everything fine (off) power -X- PC --- hub --- active cable --- mouse ok off off off off 2) Switch PC on, hub does enumerate, the lights go on on it, but that's all, no plug events on the hub: power --- PC --- hub --- active cable --- mouse ok on on ??? doesn't work 3) Unplug the cable: power --- pc --- hub -X- active cable --- mouse ok on on off off 4) Replug the cable, plug event appears, mouse works: power --- PC --- hub --- active cable --- mouse ok on on on ok 5) Unplug the hub, everything as expected: power --- pc -X- hub --- active cable --- mouse ok on off off off 6) Plug in the hub and you're in state 2 again. power --- PC --- hub --- active cable --- mouse ok on on ??? doesn't work Any ideas why this does happen? Any ideas how to work it around? Unfortunately I can't replace the active extension cable with either a passive one or a hub, I'd do it a long time ago, but it's already built into the wall ... -- Vojtech Pavlik SuSE Labs _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
