Laptop display cannot show red, HDMI output can, VGA too, so looks like hardware issue, but is a malicious video firmware mod a possibility?
by Ulysses_ from LinuxQuestions.org on (#5ACX1)
Suddenly a laptop lost the ability to show pure red pixels properly, they appear black, and pure green appears yellow. This does not occur on external displays via HDMI or VGA. Probably a hardware fault of the laptop display then. But could you please consider and help investigate another possibility:
The laptop has two GPU's. What if one GPU has had its video firmware messed up maliciously during Windows boots, and the other has not? Can we swap them over and make the external display show faulty pixels and the laptop display work correctly?
Specs:
https://www.gigabyte.com/Laptop/P35W-v3/sp#sp
The laptop has two GPU's. What if one GPU has had its video firmware messed up maliciously during Windows boots, and the other has not? Can we swap them over and make the external display show faulty pixels and the laptop display work correctly?
Specs:
https://www.gigabyte.com/Laptop/P35W-v3/sp#sp