Comment 4 for bug 1308843

Just to clarify, living with this regression is probably OK for displays of 60Hz, close to 60Hz or greater. In that case you'll only see periodic glitches like I do every few seconds.

However, displays of significantly less than 60Hz may be dramatically affected, glitching several times per second. I haven't set up the hardware to prove this, but expect it could be unbearable for say 50Hz modes. So we do need to fix this ASAP. Visual quality is a key feature of Mir we don't want to go backwards very often.