<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:10.0pt"><span style="font-family:"Verdana",sans-serif">Hi,</span></span></span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">We observed the following error on an i.MX6D+ CPU during start of X. As a result, the screen goes blank.</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">-------</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">[ 3599.200886] [drm:drm_atomic_helper_wait_for_flip_done] *ERROR* [CRTC:30:crtc-0] flip_done timed out</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">[ 3610.080885] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:30:crtc-0] flip_done timed out</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">[ 3620.320849] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:45:LVDS-1] flip_done timed out</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">[ 3630.560864] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:28:plane-0] flip_done timed out</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">-------</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The error happens quite randomly but it can be reliably reproduced by repeatedly restarting X . On our system, the error occurs somewhere between 80 and 300 restarts of X.</span></span></p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">We first observed the issue using kernel 4.14.123. Updating to 4.19.48 did not solve the issue unfortunately.</span></span></p>
<p> </p>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Cheers,</span></span></p>
<div><span lang="EN-US" style="font-size:11.0pt"><span style="font-family:"Calibri",sans-serif">Hannes Moesl</span></span></div>
</div></div></body></html>