On Thu, Jan 14, 2021 at 12:18:10PM -0500, Fred wrote: >from a non-expert (me): > >possibly figure out what happens when the device is plugged/unplugged and >doing that by hand. if you can find the udev file(s) that manage the >port(s) that get hung you may be able to figure out what those steps would >be. > >or you could try, when hung, plugging it into a different USB port... some >motherboards have multiple USB controllers, so even if one gets wedged >tight, the other one(s) shouldn't be. > >Good Luck! > >Fred > >On Thu, Jan 14, 2021 at 11:22 AM Frank Bures <listfrank1 at gmail.com> wrote: > >> Hi, >> >> my USB connected printer goes into deep space from time to time probably >> due to a HW problem on the MoBo. >> >> Is there a way how to reset the USB subsystem the same way one can restart >> networking or X without the necessity to reboot? >> Couple of cable ideas that may be of interest. I got all of these from Amazon. In my new car there is only one usb port to connect data deviced to. When I used my micro thumb drive to play music the car often "lost" the drive and it had to be pulled and reinserted. Not easy with the micro drives. A second problem was using the one port for music source or plugging in my phone for Android Auto. The cars usb system would not deal with a hub of any sort. Thus the nice credit card sized 4 port hub with individual on/off buttons for each port did not work. The lost thumb drive was solved with a cable having an on/off switch. Think of it as a 15 inch usb extension cable (M -> F) with a switch in the middle. Both problems were solved with a USB printer A/B switch. This is not a hub, but a switch intended to let you print to either of 2 different printers from a computer having a single USB port. In my case the music thumb drive and the phone are the "printers". Jon -- Jon H. LaBadie jcu at labadie.us