you may try drm-next or drm-intel-next from the mainline kernels ppa, but if those won't help then you'd better file a bug upstream at bugs.freedesktop.org (DRI -- drm/intel)
you may try drm-next or drm-intel-next from the mainline kernels ppa, but if those won't help then you'd better file a bug upstream at bugs.freedeskto p.org (DRI -- drm/intel)