https://bugzilla.kernel.org/show_bug.cgi?id=72701
--- Comment #17 from EmanueL Czirai somelinuxbugs@riseup.net --- Created attachment 142991 --> https://bugzilla.kernel.org/attachment.cgi?id=142991&action=edit dmesg with radeon.test=0
here is another dmesg in which the only thing that I've changed(from the previous dmesg) is radeon.test=0 (I actually used grub and edited the radeon.test to 3 in the previous boot, so in this boot I didn't have to do anything to get radeon.test=0 )