Comment 20 for bug 1852071

Hi Jarkko,

Thank you very much for your response! I did the procedure you described and it solved the problem! Brightness function keys started working properly in Ubuntu.
I repeated this procedure on other ZBook Studio G5 laptops we have here and it also did the job.
However! I have dual boot - after logging into Windows 10 (where buttons always work perfectly fine) and then logging again into Ubuntu brightness keys stopped working again (they were recognized as Microphone key, again). I had to do the Power Reset procedure once more which fixed the issue in Ubuntu.
After testing multiple restarts Ubuntu -> Ubuntu: brightness function keys are always working fine.
After just one Ubuntu -> Windows -> Ubuntu restart: brightness function keys stop working in Ubuntu (but work fine in Windows).

So each time after I used Windows I must do the Power Reset procedure if I want to have brightness function keys working in Ubuntu.