No firmware update, indeed.
I attach the rules file created during compile.
v4l2-ctl --all gives what seems to be information about the laptop integrated webcam
And the last lines output by dmesg are: [ 1391.394958] usb 2-1.6: new high-speed USB device number 4 using ehci-pci [ 1391.505061] usb 2-1.6: New USB device found, idVendor=199e, idProduct=8101, bcdDevice= 1.00 [ 1391.505066] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1391.505070] usb 2-1.6: Product: DMx 31AU03.AS [ 1391.505073] usb 2-1.6: Manufacturer: The Imaging Source Europe GmbH [ 1391.505076] usb 2-1.6: SerialNumber: 50700328 [ 1392.639425] uvcvideo: Found UVC 1.10 device DMx 31AU03.AS (199e:8101) [ 1392.640754] uvcvideo 2-1.6:1.0: Entity type for entity Input 4 was not initialized! [ 1449.126096] perf: interrupt took too long (4010 > 4000), lowering kernel.perf_event_max_sample_rate to 49750
It's a very interesting page you found.
Unluckily, there is no firmware for my DMK31AU03 (only for DFK and DMK of types 22uc03, 42uc03 and 72uc02).
As Mr Geissler wrote, my 15 years old camera was designed in a time when no one suspected it would one day be used with Linux.