I forgot to add that a Gnome dev says that it's not Gnome fault 

https://bugzilla.gnome.org/show_bug.cgi?id=768878

Thanks !

Maybe I should have precised that it is with Gnome Shell 3.20, the screen should turn off is the expected behavior, with Deezer the problem doesn't occur.

Still happening, I hope that can be fixed.

It seems that Chromium block power saving when you play a media. I use KDE Plasma 5 too and the widget battery report exactly that "Chromium block power saving" when you play a media. It can be Flash audio / video or HTML5 video / audio.

It can make sense for video content but not for audio. Even for video content it doesn't always make sense because sometimes you just want the audio and it's not needed to keep the screen on.

We handle preventing system sleep and preventing display sleep in  device/power_save_blocker/power_save_blocker_x11.cc for a variety of different Linux environments. Maybe something is going wrong there, or maybe Spotify is requesting keep display awake somehow.

Do you know if Spotify is still using Flash these days or if they have gone plugin free?

Can you sanity check on a Windows or Mac computer to see if the monitor stays on there as well?

No feedback was received in the last 30 days from reporter "jeremy9856@gmail.com", so archiving this. Please re-open or file a new bug if this is still an issue.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot