I have a Logitech c270. The box says it supports UVC, I've installed
uvideo-firmware, and it is recognized as a video device, but running
video(1) fails with an error:

video: ioctl VIDIOC_STREAMON: Invalid argument

There is also a kernel message:

uvideo0: could not open VS pipe: INVAL

usbdevs(1) identifies the device as:

addr 5: product 0x0825, Logitech

What is causing this problem and how can I fix it?

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