Correction: M50-Stable release

Could be related to  issue 608024 , which sometimes leaves UI hanging.

frecon related, passing to dbehr@chromium.org.

Quick lines from the log I saw:

On boot, we have a few of the following (not sure if it related):
2016-05-12T18:49:45.867657+00:00 WARNING kernel: [    0.164254] WARNING: CPU: 0 PID: 1 at /mnt/host/source/src/third_party/kernel/v3.18/drivers/base/power/common.c:156 dev_pm_domain_set+0x58/0x5b()
2016-05-12T18:49:45.867660+00:00 WARNING kernel: [    0.164257] PM domains can only be changed for unbound devices

There were quite some of similar lines like the following in all boots:
2016-05-12T18:49:45.870029+00:00 WARNING kernel: [    2.869907] frecon: Skipping duplicate input device /dev/input/event0
2016-05-12T18:49:45.889150+00:00 WARNING kernel: [    2.920099] frecon: Skipping duplicate input device /dev/input/event2
...

The 2nd boot is shutdown uncleaned.

The 3rd boot, I saw
2016-05-12T12:18:05.472233-07:00 WARNING kernel: [   34.789377] frecon: Unable to set crtc: Invalid argument

But no frecon lines other than the "Skipping duplicate input device" ones.

I saw same problem on my handy Celes, as well as the kernel log pattern, I tried w/ R50-7978.76.0, R52-8337.1.0, local build chromium-os images; however I also noticed that it affects guest and 2nd signed in user, while 1st signed in account, I could switch in and out, once signed out, I cannot switch any more.

Had some dichotomy:

R50 7942.0.0:  2016-02-20:  safe
R51 8121.0.0:  2016-03-28:  safe
R51 8172.5.0:  2016-04-18:  bad

Is this a dupe of  bug 610790 ?