Comment 47 for bug 1697556

$ git bisect log
git bisect start 'drivers/gpu/drm/nouveau'
# old: [a351e9b9fc24e982ec2f0e76379a49826036da12] Linux 4.11
git bisect old a351e9b9fc24e982ec2f0e76379a49826036da12
# new: [2ea659a9ef488125eb46da6eb571de5eae5c43f6] Linux 4.12-rc1
git bisect new 2ea659a9ef488125eb46da6eb571de5eae5c43f6
# new: [6796b129b0e98162a84e0b6322ac28587556d427] Merge branch 'linux-4.12' of git://github.com/skeggsb/linux into drm-next
git bisect new 6796b129b0e98162a84e0b6322ac28587556d427

Please try the new kernel here:
http://people.canonical.com/~khfeng/lp1697556/2/