This isn't a mesa bug. The problem is that, if '-background none' is set, X use whatever random garbage happens to be in the framebuffer when it starts up. I think what is likely going on is that it's suddenly treating that data as compressed and so it gets corrupted. In any case, I think this is highly unlikely to be an actual mesa bug.
This isn't a mesa bug. The problem is that, if '-background none' is set, X use whatever random garbage happens to be in the framebuffer when it starts up. I think what is likely going on is that it's suddenly treating that data as compressed and so it gets corrupted. In any case, I think this is highly unlikely to be an actual mesa bug.