log in as SU (root)
(some read out happens)
(you should see this)
E: Repository 'http://deb.opera.com/opera-beta stable InRelease' changed its 'Origin' value from 'Opera Software ASA' to 'Opera Software AS'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
Do you want to accept these changes and continue updating from this repository? [y/N] y
y (is your answer)
I am really surprised that over 250 folks have read my post and I have received only one set of questions and one possible solution....which unfortunately didn't work......and that's been it. I figured this was a simple fix that I just wasn't smart enough to do, or it was something common that others had already experienced and had worked through a solution. Now I'm not sure if I just have some strange side-effect of using various (approved) apps or whether my computer needs an exorcism. It certainly isn't a game changer....I can always switch to Firefox or Chrome and print to my heart's content, but there is something very wrong when a browser won't let you print at all. Before I uninstall Opera, I guess I will cast this posting out one more time and see if I get any nibbles. Ridgerunner
An update on this.
v57.0.3098.91 is working OK
As of right now, a new version is available, but I had to back out of the upgrade because of loading problems. Linux, it seems, is such a broad target that, when you have a working Opera version, you need a way of getting back to it.
@sgunhouse It is more hidden but still there. At least on the latest Opera Version for Linux.
After I disabled Turbo, it is now working, but there should be a warning/hint/... to disable turbo if it can't be implemented to redirect to the login page.
Repro rate: ~5/10
Deleting the config folder and re-configuring Opera from scratch does not resolve the issue
Workaround: press CTRL+W to un-freeze Cinnamon (closing the Inspector window that triggered the issue)
Noticing that you are on ubuntu, I have to ask if you have chromium ffmpeg codecs installed?
If yes, opera will play the videos on youtube in h264, which can be hardware accelerated and not stress your cpu that much. If not, opera will play them in webm which can not be hardware accelerated, so your cpu will have to do the playback and heat up.