[Freerunner] Backlight flickering slightly

[Marcel]

G'evening,

My FR's backlight is flickering very (!) slightly for a very long time now and 
I wonder what this comes from. It's the most noticeable on the grey X startup 
screen until the windowmanager has started. There are no other issues with 
the backlight, just this one...

[GTA02A5 (I suppose, it's from one of the first batches) running Debian]

--
Marcel