My brightness slider/controller disappeared after 23.04 ubuntu upgrade (top right hand corner + in power settings), used to work before in 22.10. (similar problem to this i suppose: 22.04 jammy shows no brightness sliders under Settings > Power and this Ubuntu 22.04 after update screen brightness control disappeared from the bar and brightness is at 100%)
Tried above ideas but nothing changed after reboot. Any ideas? Some say firmwares or graphics card driver but that i don't how to go about troubleshooting those.
kernel: 6.2.0-34-generic Lenovo ThinkCentre M720q firmware version: M1UKT65A graphics: Intel® UHD Graphics 630 (CFL GT2) Ubuntu 23.04 gnome 44.3
Thanks a million to any helper! :)
