Change Background Color after GDM Login Ubuntu Debian

Problem: Background Color is default brown at Ubuntu after you have logged in by gdm

Solution:

  1. open console
  2. run
    #sudo nano /etc/gdm/PreSession/Default
  3. change Key
    #dab082
    (Backcolorsetting at Line 61)
  4. to
    #000000
    (Black)
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