On Monday 18 September 2017 11:39:26 Tixy wrote: > On Mon, 2017-09-18 at 11:13 -0400, Gene Heskett wrote: > [...] > > > My instant problem, a disappearing usb camera, could also be solved > > I think, by power cycling the usb port its plugged into, as it will > > re-appear after a powerdown reboot, but I do not know how to do that > > short of a powerdown reset. If there is such an ability the user, > > or a sudo can do, that would also be helpfull. > > I don't know if this is useful, but the method I found for resetting a > USB device was to unbind then rebind it with something like: > > echo '3-1.4' >/sys/bus/usb/drivers/usb/unbind > echo '3-1.4' >/sys/bus/usb/drivers/usb/bind > > Where '3-1.4' is the endpoint name for the device found by looking in > the kernel log. E.g. for this example I ran the 'dmesg' command and > looked for my web camera and found these entries: > > usb 3-1.4: new high-speed USB device number 3 using ehci-pci > usb 3-1.4: New USB device found, idVendor=2232, idProduct=1018 > usb 3-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > usb 3-1.4: Product: WebCam SC-13HDL11431N > > I don't know if this will help with your particular problem. Looks ideal, but the hub/port.number does't exist. I'll go reboot it and see what it shows up that tree. Back in a bit.
Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene>
