Fedora 39: No sound over HDMI on ThinkPad T460p and Ultra Dock 40A2

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1

Hi,

i’m using fedora 39, kernel 6.6.6 on an Lenovo ThinkPad T460p. Audio out over HDMI works fine, but when i attach an Ultra Dock 40A2, there is no sound over the HDMI connection.

Any help appreciated.

2

are firmware of Thinkpad and Dock up to date?

4

Okay, BIOS firmware is up to date

5

i found out how to update firmware of thinkpad and dock, propblem still persists

6

I have no clue, just guessing … after connecting the notebook to the dock, can you re-select your audio output?

7

Yes, tried that multiple times. Also changed to analog and back

8

Turned out the problem was faulty hardware. Swapping the dock with another one solved the issue. Somewhere i read earlier models may suffer from this audio problem.