Sounds like a BIOS issue and Lenovo seems to have a BIOS update newer than your BIOS.
*Note* BIOS updates at your own risks. Please do not do it if you are unsure. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1933373 Title: Brightness hotkeys(Fn+F5 for decrease and Fn+F6 for Increase) are not working on Ubuntu 20.04. Hardware Lenovo Ideapad-5-15ITL05. It didn't work on Ubuntu 21.04 either . But I can change brightness from brightness slider. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1933373/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
