Hi, I am seeing this also on Linux-Next. /var/log/kern.log:Feb 27 22:52:35 fambox kernel: [ 28.202381] [drm:intel_dp_aux_wait_done] *ERROR* dp aux hw did not signal timeout (has irq: 1)! /var/log/kern.log:Feb 27 22:52:35 fambox kernel: [ 28.210588] [drm:intel_dp_aux_wait_done] *ERROR* dp aux hw did not signal timeout (has irq: 1)! /var/log/kern.log.1:Feb 22 07:36:04 fambox kernel: [ 27.408280] [drm:intel_dp_aux_wait_done] *ERROR* dp aux hw did not signal timeout (has irq: 1)! This seems to be hard reproducible... Laptop-LCD... Sandybridge Mobile-GT2. Is there a way to force the error? Possible patch see [1]. - Sedat - [1] https://patchwork.kernel.org/patch/2192721/