Comment 13 for bug 281610

Can someone please confirm that 2:1.5.1-1ubuntu2 doesn't suffer from this bug and that 2:1.5.1-1ubuntu3 does?

If someone experiencing the bug knows how to "git bisect", then it would be helpful to "git bisect" the failure to the upstream commit causing the regression; the Ubuntu package is kept in git in the ubuntu branch of <git://git.debian.org/git/pkg-xorg/xserver/xorg-server>.

You can also try from upstream git directly if you can reproduce with upstream tip.