Full dynamic power management for AMD Radeon graphics hardware was added
in Ubuntu 14.04 "Trusty Tahr"'s 3.13-based kernel. It was disabled in
the upstream 3.14 kernel for AMD "Cayman", "Barts", "Turks" and "Caicos"
hardware due to stability issues and re-enabled in the upstream 3.17
kernel after several fixes and improvements were made.
Ubuntu 15.04 "Vivid Vervet" is based on the upstream 3.19 kernel. Can
you please test on Vivid and let us know if you are still having this
issue?
** Changed in: xserver-xorg-video-ati (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1313459
Title:
Screen corruption with Radeon 6670
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1313459/+subscriptions
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