Web cam not working on Lenovo Miix 520

My webcam is not working after I migrated my Fedora installation to this Lenovo Miix 520.
The hardware is:

             description: Multimedia controller
             product: Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Imaging Unit
             vendor: Intel Corporation
             physical id: 5
             bus info: pci@0000:00:05.0
             version: 01
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm cap_list
             configuration: driver=ipu3-imgu latency=0
             resources: irq:148 memory:a3000000-a33fffff

The driver ipu3-imgu loads with the following kernel message:

[  589.897280] ipu3-imgu 0000:00:05.0: device 0x1919 (rev: 0x1)
[  589.897438] ipu3-imgu 0000:00:05.0: physical base address 0x00000000a3000000, 4194304 bytes
[  589.987253] ipu3-imgu 0000:00:05.0: loaded firmware version irci_irci_ecr-master_20161208_0213_20170112_1500, 17 binaries, 1212984 bytes
[  603.783296] ipu3-imgu 0000:00:05.0: required queues are disabled
[  603.799829] ipu3-imgu 0000:00:05.0: required queues are disabled

I am in the video group, but there is no camera found in cheese for example.

Can you tell me what is wrong?