We started packaging master and got an SNB regression in the last 3-4 days. We started getting GPU hang/resets when running gnome-shell. Bisection showed it was 9a21bc640188e4078075b9f8e6701853a4f0bbe4 Reverting this fixes it.
this doesn't cleanly revert on master either.
*** This bug has been marked as a duplicate of bug 35820 ***
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