https://bugs.freedesktop.org/show_bug.cgi?id=88152
--- Comment #34 from Christian König deathsimple@vodafone.de --- (In reply to Arthur Marsh from comment #33)
Where to from here? I'm happy to build kernels and other packages from source, test and bisect, but I'm not a C programmer.
Unfortunately we don't really have time taking care of the older hardware generations. Getting the new generations working has usually priority.
I have a couple of ideas what could cause this, but you clearly need to hack into the code to figure out what it is.
Sorry that I can't help here much, Christian.