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Hi.

Same issue here. Elitebook 840 G5

Here's what I've found in dmesg:

[    5.321997] uvcvideo: Found UVC 1.50 device HP HD Camera (05c8:0808)
[    5.323209] i2c_hid i2c-SYNA3071:00: i2c-SYNA3071:00 supply vdd not found, using dummy regulator
[    5.323278] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
[    5.323869] uvcvideo: Failed to query (129) UVC probe control : -75 (exp. 34).
[    5.323872] uvcvideo: Failed to initialize the device (-5).
[    5.324804] uvcvideo: Unknown video format 00000032-0002-0010-8000-00aa00389b71
[    5.324808] uvcvideo: Found UVC 1.50 device HP HD Camera (05c8:0808)
[    5.325830] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
[    5.326501] uvcvideo: Failed to query (129) UVC probe control : -75 (exp. 34).
[    5.326503] uvcvideo: Failed to initialize the device (-5).
[    5.326520] usbcore: registered new interface driver uvcvideo

Any ideas?