sometimes dim screen can indicate that the refresh rate is not optimal, ie
to higher resolution and too higher refresh, because it has not correctly identified your monitor.
so go into the mageia control panel select setup graphical server
and make sure that the monitor is specified correctly.
if it is then perhaps try limiting the available refresh rates in the /etc/X11/xorg.conf
this is the section from my file
- Code: Select all
Section "Monitor"
Identifier "Monitor0"
VendorName "Samsung"
ModelName "S27A950D"
HorizSync 26.0 - 140.0
VertRefresh 120.0
EndSection
regards peter