I am using an AMD/ATI Cape Verde PRO [Radeon HD 7750/8740 / R7 250E with 4 screens. I upgraded to 4.6 get some of the BTRFS performance enhancements. When I upgraded to the 4.6 kernel one of the screens started randomly power-cycling. It would turn-off and then back on. The answer was to switch back to an earlier kernel. -Khalid kpaden1@engineer.com
I would expect regression is likely to be related to the radeon driver. Perhaps you can git-bisect which kernel version caused it to break?
Also, please attach the dmesg output and Xorg log file (assuming you're using X), preferably captured after the problem occurred.
Created attachment 217331 [details] Xorg.0.log Here you are, -Khalid On 05/23/2016 09:35 PM, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=118611 > > --- Comment #2 from Michel Dänzer <michel@daenzer.net> --- > Also, please attach the dmesg output and Xorg log file (assuming you're using > X), preferably captured after the problem occurred. >
Created attachment 217341 [details] DMESG.txt
Sorry, I am not familiar with git-bisect. It is kernel 4.6.
Enter "git bisect howto" in your favourite web search engine.
The answer was to go into the display control screen, and lower the resolution of the screen that was powering off. I noticed in Kernel 4.5.3, this was a problem. But it is ok now with the one screen at a lower resolution.