Created attachment 375350 [details, diff] fix i915 <gen6 hardware with kernel >=3.14 A code change in kernel 3.14 requires fixing mesa for certain i915 hardware (gen4 and 5). Even master still isn't fixed, the proposed patch applies cleanly to 10.1.1 and fixes the problem for me.
fix has gone upstream, let's patch it downstream?
not fixed in upstream mesa-10.1.2
still not fixed in upstream mesa-10.1.3
Then your issue that you are seeing is not fdo #75723, as this has already been fixed in 10.1 branch and is included in mesa-10.1.2 http://cgit.freedesktop.org/mesa/mesa/commit/?h=10.1&id=f4b0b3a40293b782d4759cfff34e3cf13b7ed339
Oh, I was wondering how that patch did still apply here when it should have been backported already, but in fact an entirely different patch made it upstream instead of the one from the bug. Sorry for the noise then, works for me now (I'm not often testing kernels above 3.4.9999, just to see if by some chance my pet bug(s) have been fixed).