Comment 160 for bug 1488719

I'm still not sure what we're looking at here, especially if the original message this bug deals with has anything to do with the other described buggy behaviour here, which are: random freezes, display flickering, not working external displays etc. I watched the development of the comments in this bug really closely (not at least because of my own interests being affected as well) and there hasn't been any real progress in investigating this issue(s) further. I think this is not least caused by the complexity and variatons of issues regarding graphics.

IMHO this leads to three taks which has to be done:

1. Identifiying distinct issues and filing distinct bug reports while being aware of possible duplicates.

2. If you're affected and feeling confident in providing more information, investigate those distinct issues further and provide proper amounts of logs/traces etc. possbile related to those distinct issues.

3. Pushing those issues to the proper upstream bugtrackes. (For me this is one of the hardest parts, since I'm not sure which parts play a role here, e.g. kernel, display manager etc.) When I look at my own logs (attached) my issue still looks like a kernel problem.

I've tested the 4.5RC7, the origial message is gone, but my external display (connected to DP of my advanced lenovo dock) stays black if the T450s is docked while booting. If I undock after boot and then dock it again, the system freezes totally and syslog is showing some serious kernel issues. The only way to cirumvent this behaviour is to boot undocked and then dock when the system is fully booted. I'm currently using this workaround in my daily work to see if there are other issues. I think I will file a bug report on bugs.freedesktop.org later.