Brightness-Keys not working properly - Zbook Studio G5 on Ubuntu 19.04

[tkonicz]

Hello,

I managed to get Ubuntu 19.04 up and running on my Zbook Studio G5, but the keyboard keys for the brightness-control are not working (they turn the micro on and off instead). This bug affects other distros too, like Debian or Solus (tired them out). I guess it must be a kernel-issue then? Any ideas how to fix it? Even Manjaro with Kernel 5.2(rc7) has this issue

If someone managed to get Linux running flawlessly on this notebook: Is there a way to fix it? Can I assign the right function to the keys (dconf maybe?)?

Greetings, tom

[tkonicz · Accepted solution]

I managed to solve the issue. A Bios-Update was required, which was quite difficult, because Windows 10 is needet for tthis mundane task. 

[DanRdz]

Thanks for sharing the update.