On Fri, Apr 15, 2022 at 12:15 PM Paul Smith <phhs80(a)gmail.com&gt; wrote: WIld guess - the USB bus in question doesn't have enough power budget for both devices? As previously noted - dmesg output may provide a proper clue.

Thanks to all for your help. I have plug the webcam in a USB port behind the computer and the drawing tablet in the front of the computer, and now the two devices can work when both connected to the computer. Before, both were plugged in the front of the computer, in USB ports side by side. I guess the problem was related to the USB bus that may not have enough power budget for both devices, as Go Canes conjectured. Paul On Fri, Apr 15, 2022 at 7:01 PM Mauricio Tavares <raubvogel(a)gmail.com&gt; wrote: > > Does your computer have more than one USB chain, so you can see if the > problem follows the USB bus or the device(s)? > > On Fri, Apr 15, 2022 at 12:15 PM Paul Smith <phhs80(a)gmail.com&gt; wrote: > > > > Dear All, > > > > When I plug in my drawing tablet, my webcam does not work; when I > > unplug the drawing tablet, the webcam starts to work. > > > > Both devices use USB to connect to the computer. > > > > Could you please direct me in the right direction to the cause of the problem? > > > > Thanks in advance, > > > > Paul > > _______________________________________________ > > users mailing list -- users(a)lists.fedoraproject.org > > To unsubscribe send an email to users-leave(a)lists.fedoraproject.org > > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > > List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > > Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure > _______________________________________________ > users mailing list -- users(a)lists.fedoraproject.org > To unsubscribe send an email to users-leave(a)lists.fedoraproject.org > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure