Comment 35 for bug 1493888

It's puzzling that Ubuntu continues to release software that make the PC unusable for A LARGE subset of users. Several months ago, while using Ubuntu 15.04, a new kernel version was released that made it impossible to log in and it affected every single user with AMD video card that used binary drivers. And now this bug again appears to affect every single user with an AMD card/ binary drivers combo. I remember hearing Shuttleworth describing Cannonical testing environment and how everything is automated and how they put a lot of effort to perfect it, blah blah blah. But how can this be when Ubuntu routinely releases software that deterministically renders computer 100% unusable for everyone with an AMD video card? It just doesn't make any sense. How are these kinds of bugs not release show stoppers?