Hi Freezy These are definitely not normal: [67751.358425] usb 1-8.1: 3:1: cannot get freq at ep 0x89 [67757.849828] usb 1-8.1: 3:1: cannot set freq 16000 to ep 0x89 [67762.966807] usb 1-8.1: 3:0: usb_set_interface failed (-110) Can you try using a powered usb hub? Just to make sure that there is a difference? Also share the whole dmesg, with and without the quirk Thanks! On Sun, 20 Feb 2022 at 10:13, Freezy <freezy@xxxxxxxxx> wrote: > > hi, i bought this webcam > https://www.hikvision.com/en/products/Turbo-HD-Products/Turbo-HD-Cameras/webcam-series/ds-u12/ > and after connecting, camera does not work at all, is needed to rmmod > uvcvideo and then modprobe uvcvideo quirks=0x100 trace=1, after this > camera works sometimes .. mostly is needed to do rmmod and modprobe few > times and then camera works, probably some bug in driver or udev? btw > tested on windows 10 and camera works fine .. > > attached files: dmesg.log (related dmesg messages), lsusb.log (lsusb > info about webcam) and system.log (info about system, v4l-utils and > uvcvideo module) > > thanks for your help, Dave -- Ricardo Ribalda
