Same issues here, corruption and slowness on kwin with an Intel 3rd gen gpu (HD4000?)l As suggested in the original post, I downgraded to mesa 8.0.4 and now kwin is again rendering at 60fps with no corruption.
Same issues here, corruption and slowness on kwin with an Intel 3rd gen gpu (HD4000?)l As suggested in the original post, I downgraded to mesa 8.0.4 and now kwin is again rendering at 60fps with no corruption.