Just as an update, in the Freedesktop issue, I found using a LOWER specced/older cable to fix the problem.
I do not know how to debug it further but I suspect the bug is in the support of later version of the HDMI standard.
Just as an update, in the Freedesktop issue, I found using a LOWER specced/older cable to fix the problem.
I do not know how to debug it further but I suspect the bug is in the support of later version of the HDMI standard.