On 09/29/2020 10:07 PM, John Pierce wrote: > try the camera in a USB 2 port, it should work just fine at usb 2 speeds. > most systems, the USB 3 ports hve a 'blue' tongue, while the 2 ports are > black or another color. > > On Tue, Sep 29, 2020 at 6:50 PM H <agents at meddatainc.com> wrote: > >> On 09/29/2020 09:09 PM, John Pierce wrote: >>> do other USB 3 (XHCI) devices work on this system ? >>> >>> On Tue, Sep 29, 2020 at 5:27 PM H <agents at meddatainc.com> wrote: >>> >>>> On 09/29/2020 02:11 PM, Bruce Ferrell wrote: >>>>> Try >>>>> >>>>> lsusb -v >>>>> >>>>> and >>>>> >>>>> sudo dmesg >>>>> >>>>> ... Be aware, systemd deals with udev and it may be malfunctioning >>>>> >>>>> >>>>> On 9/29/2020 10:30 AM, H wrote: >>>>>> Just installed the above USB webcam but it is not recognized by dmesg >> | >>>> grep usb, nor does Zoom recognize it. I was under the understanding it >>>> should not require a driver, or? >>>>>> I am running CentOS 7. >>>>>> >>>>>> Thanks. >>>>>> >>>>>> _______________________________________________ >>>>>> CentOS mailing list >>>>>> CentOS at centos.org >>>>>> https://lists.centos.org/mailman/listinfo/centos >>>>> _______________________________________________ >>>>> CentOS mailing list >>>>> CentOS at centos.org >>>>> https://lists.centos.org/mailman/listinfo/centos >>>> I'll bite, systemd and its interaction with udev is beyond my paygrade. >>>> How do I investigate this? >>>> >>>> _______________________________________________ >>>> CentOS mailing list >>>> CentOS at centos.org >>>> https://lists.centos.org/mailman/listinfo/centos >>>> >> Not sure I have any. I tried two different USB 3.0 connectors with the >> same result. >> >> Is there any way I can test this? >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos >> > Just tried a USB 2 port with a similar outcome: kernel: usb 1-9: can't read configurations, error -32 kernel: usb usb1-port9: attempt power cycle kernel: usb 1-9: new high-speed USB device number 23 using xhci_hcd kernel: usb 1-9: unable to read config index 0 descriptor/all kernel: usb 1-9: can't read configurations, error -32 kernel: usb 1-9: new high-speed USB device number 24 using xhci_hcd kernel: usb 1-9: unable to read config index 0 descriptor/all kernel: usb 1-9: can't read configurations, error -32 kernel: usb usb1-port9: unable to enumerate USB device I also have Logitech Bluetooth mouse, an external harddisk, a Belkin USB-serial adapter for my UPS, and a Canon scanner attached to other USB ports, all working fine.