https://bugs.freedesktop.org/show_bug.cgi?id=72283
--- Comment #31 from Lee Donaghy lee295012@gmail.com --- Created attachment 90739 --> https://bugs.freedesktop.org/attachment.cgi?id=90739&action=edit dmesg
i now have a working screen.
i get this error in dmesg: [drm:dce4_afmt_write_speaker_allocation] *ERROR* Couldn't read Speaker Allocation Data Block: 0 but video and audio is working for me.
many thanks.