https://bugs.freedesktop.org/show_bug.cgi?id=108514
--- Comment #5 from Werner Lueckel werner.lueckel@googlemail.com --- Created attachment 142156 --> https://bugs.freedesktop.org/attachment.cgi?id=142156&action=edit dmesg Ubuntu14.04, Kernel4.4.0-133, radeon 2.43.0, screen flickering
... and I found out that the screen-flickering already starts with VERSION="14.04.5 LTS, Trusty Tahr" kernel: 4.4.0-133-generic radeon 2.43.0
see the attached dmesg14.04_4.4.0-133.txt