On Tue, 2 Aug 2016, Jiri Kosina wrote:
In addition to that, what I see with current git (HEAD == 731c7d3a205, i.e. the drm merge) is lockdep report during bootup about AB-BA between mode_config.mutex and fb_notifier_list rwsem; will probably not have time to look into it more (look at the code and / or bisect) until tomorrow, so sending out early as a heads-up.
Also, trying to suspend the machine to disk hangs, with the "suspend" LED constantly blinking, LCD being blank, but the machine never actually powering off. Not sure whether it might not be the very deadlock actually triggering for real.
Ok, I tried HEAD == 7a66ecf (per-drm merge kernel from yesterday), and it doesn't produce the AB-BA warning (so it's really introduced by the last merge), but still has the suspend issue, so those are two separate issues.