Can't change brightness after update

I have recently upgraded by Lubuntu 20.04 installation. Now I cant change brightness. I already had a Lubuntu 22.04 installation and normally during boot, the grub of the 22.04 used to show up but after this update, the old black grub of the 20.04 is now showing up (doesn’t matter to me but thought you should know)
Please help


This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.