At shutdown yesterday this was working fine. On boot this morning the keyboard is set at Dim. I went into BIOS>System and set the keyboard illumination: Bright>Apply>Exit
When the boot process is complete the keyboard has been reset to Dim.
I suspect this may have something to do with a kernel update installed yesterday. Any clues?
Thank you. I installed brightnessctl and it seems to be working, based on what it is returning in the terminal. Difficult to tell visually because I am currently in rather bright daylight.