GNOME 43's Mutter Lands Max BPC Property Support To Deal With Monitor Issues
Mutter now supports the maximum bits per color property and respects that for when needing to lower display bandwidth requirements where the system (GPU) may not be able to drive particular displays out-of-the-box at the given defaults. Lowering the color depth is one of the ways to lessen the display bandwidth use rather than having to lower the resolution or refresh rate. The max BPC propety can also be used for expressing support for a higher color depth than the default. This property value can be set from user-space if needing to lower it too due to faulty cables and dongles or other hardware.
As covered in the earlier linked Phoronix article, Canonical's Daniel van Vugt has been leading the max BPC property integration work for GNOME.
As of this weekend, MR 2412 for supporting the "max BPC" property made it into Mutter ahead of GNOME 43.0. Look for the rollout of GNOME 43 stable on 21 September.