I have a Lenovo x220, i5 with BIOS 1.40.
I have a issue when booting into Ubuntu to login and when I log out where the screen dims and is barely visible until I increase the brightness.
I had a issue with GRUB shortly before, assuming it was related (and I did not have any required data on the machine) I formatted my drive and reinstalled Ubunutu. However the issue persists even after the fresh install.
I have checked BIOS as other forums suggest and there is no brightness settings in there.
Can anyone please help?