On Sun, 22 Jan 2012, Tim Coote wrote: > not messianic enough - I forgot to check that the inverter was > incommunicado. this is a different computer (t43 like the xp box) > with different fedora (16 vs 15). I wasn't around that day. You might look for differences between the two computers. For example, the interfering program might be something like ModemManager or usb_modeswitdh, installed on one machine but not the other. > ok. so now I need to redo on a day that I know I'm around to confirm > that the inverter gets nobbled. I'll confirm that the tusb > interference is happening, too. It's worth repeating that you don't have to do these tests overnight. If you unplug the TUSB, enable usbfs_snoop, start up wireshark, and then plug the TUSB back in -- all during the daytime -- that should be good enough to spot whatever is going wrong. And it won't generate an immense log file, either. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html