On Mon, Jan 06, 2025 at 02:15:24PM +0100, Tomasz Sikora wrote: > Error in line 1034 dmesg.log > You can see more here https://bbs.archlinux.org/viewtopic.php?id=301737 > > pon., 6 sty 2025 o 11:56 Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxx> > napisał(a): > > > On Sun, Jan 05, 2025 at 07:31:09PM +0100, Tomasz Sikora wrote: > > > Issue video camera > > > ls -l /dev/video*zsh: no matches found: /dev/video* > > > > > > > > > 01 15:43:24 Linux kernel: usb 3-2: Found multiple Units with ID 5 > > > > Can you attach complete dmesg output? And more importantly, attach the > > output of lsusb -vv? > > > > Thanks. > > Cascardo. > > Thanks a lot, Tomasz. Without this patch (it could be an older kernel), do you see a warning in your dmesg? Or messages like: [ 395.090938] usb 1-1: Failed to create links for entity 5 [ 395.091385] usb 1-1: Failed to register entities (-22). Otherwise, it might just be that your kernel is not built with CONFIG_MEDIA_CONTROLLER. I reached that conclusion by emulating a similar uvc device. Yours has the entity ID for both the output terminal and processing unit. Though that is not valid according to the spec (even UVC 1.0 mentions the IDs should be unique), we should keep supporting such devices. I am currently working on a fix that will restore support for your device but improve its support for configs with CONFIG_MEDIA_CONTROLLER. I appreciate your help on testing such configurations and fixes. Thanks. Cascardo.
