(Error code 1c1c20)
This error originated from one of the following locations within the iPXE source code:
DEBUG=fbcon
(Please edit this page to include any of your own useful hints and tips for fixing this error.)
This is an old revision of the document!
The resolution you've tried to use is most likely smaller than the font glyph dimensions. Try to use a resolution provided by your VESA BIOS. Build with DEBUG=vesafb,fbcon to get a listing of your hardware's supported resolutions and more information on why this is failing.