Chris Guiver:

1) Regarding hibernate not working, if you would like to pursue a fix for this, 
it is out of scope for this report. However, you may file a new report about it 
via a terminal:
ubuntu-bug linux

2) To clarify, did you have issues after sleep/resume in 17.10?

3) In regards to sleep/resume testing, when folks are vetting
sleep/resume, they typically do 30-50 consecutive sleep cycles to rule
out one offs. It wouldn't hurt to do this to see if a sleep/resume issue
may be reproduced this way.

4) With regard to root cause, a few other possibilities:
* This issue could be the fall out of a failed sleep/resume versus apps not 
working. The reproduction of this could depend on how long you have the 
computer in sleep, how long it was in use prior to sleep, what apps you have 
running prior to sleep, and/or other factors (i.e. misbehaving 
drivers/firmware).
* When you upgraded from 17.10, there could have been some cruft left over from 
the upgrade, that when caffeine was removed and re-installed, it was reset to 
default configuration.

Hence, we can keep an eye on this given you did some preliminary testing
without reproduction, and allow more testing results to be reviewed.

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https://bugs.launchpad.net/bugs/1772542

Title:
  after waking from sleep i get text radeon error message then return
  login screen

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