https://bugs.freedesktop.org/show_bug.cgi?id=70542
--- Comment #9 from dagg stompdagger1@yahoo.com --- (In reply to comment #8)
(In reply to comment #7)
not sure if it is relevant but I use a 10 meters cable to connect the tv to the computer
That's a bit much. Could you try with a shorter one to make sure it's not the cable?
nope... tv is too far. anyway, didn't had any issues when I was using the intel gpu.