Comment 16 for bug 1355044

Changelog for that lists these:

drm/radeon: only apply bapm changes for AC power on ARUBA
drm/radeon: enable bapm by default on KV/KB
drm/radeon: enable bapm by default on desktop TN/RL boards

Only the last one seems to be the only one to apply to Trinity APUs. The diff is here and it is the likely fix, however it shouldn't just be applied because it may cause stability issues with other non-MSI computers:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-3.16.y&id=0c78a44964db3d483b0c09a8236e0fe123aa9cfc

The follow up enables `bapm` only on MSI systems because he states other systems have stability issues when `bapm` is enabled:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-3.16.y&id=730a336c33a3398d65896e8ee3ef9f5679fe30a9

If you have to bisect completely, this might let you only test 2 commits. Hopefully, the commit before my first link will fail and the first link's commit will work properly. Then the proper fix would be to apply both patches.