https://bugzilla.kernel.org/show_bug.cgi?id=93701
--- Comment #21 from Frederik vom Hofe frederik.hofe@gmail.com --- Just got a 290 that shows the same phenomena since patch revert.
2d1c18bba15daf89d75ce475ecd2068f483aa12f Revert "drm/radeon: only mark audio as connected if the monitor supports it (v3)" ...
Bisected v4.1-rc5 to v4.1-rc6. Sinc v4.2-rc1 still shows the lines.
Also attaching new dmesg and Xorg log, just in case.