https://bugzilla.kernel.org/show_bug.cgi?id=83461
--- Comment #14 from Christian König deathsimple@vodafone.de --- Created attachment 155721 --> https://bugzilla.kernel.org/attachment.cgi?id=155721&action=edit Add more debugging output.
Please apply the attached patch and provide new dmesg created with drm.debug=0xE
It should now show a bit more debugging output about your hardware.