https://bugzilla.kernel.org/show_bug.cgi?id=90621

Bug ID: 90621 Summary: Graphics card locks up fom time to time (*ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)) Product: Drivers Version: 2.5 Kernel Version: 3.18.1 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: andros@all-ein.net Regression: No

Created attachment 162311 --> https://bugzilla.kernel.org/attachment.cgi?id=162311&action=edit last message in log

The System is locking up, not even magic keys work only hard reset. Not often maybe 2 times a week.

Screen blackens for a second than gets back again but everything is frozen.

I NEVER do Resume or Hibernation or Standby. So this happens occasionally.

If you search can find some others who have the same problem starting with 3.17 https://www.google.de/search?q=radeon++fence+driver+on+ring+5+use+gpu+addr++...