https://bugzilla.kernel.org/show_bug.cgi?id=78661
--- Comment #5 from Nikolaus Waxweiler madigens@gmail.com --- Created attachment 141821 --> https://bugzilla.kernel.org/attachment.cgi?id=141821&action=edit It happened again with radeon.dpm=0 and power_profile set to low.
syslog since using radeon.dpm=0 on ther kernel command line.