Unable to reproduce the issue on Ubuntu 14.04 using chrome stable #62.0.3202.89 and latest dev #64.0.3260.2

Following are the steps followed to reproduce the issue.
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1. Started a Hangouts call in a new browser tab https://hangouts.google.com
2. Didn't move the mouse.
3. Observed that chrome did not dimm out and turn off while being on the Hangouts call.

orschiro@ - Could you please check the issue on latest dev #64.0.3260.2 by creating a new profile without any apps and extensions and please let us know if the issue still persist or not.

Thanks...!!
		

Dear krajshree,

Just tried on dev  64.0.3260.2 on Ubuntu 18.04 but yes it dims after a while of not moving the mouse. I followed exactly your steps and used a new profile.

What else can I try?

Thank you for providing more feedback. Adding requester "krajshree@chromium.org" to the cc list and removing "Needs-Feedback" label.

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

I believe Media is what should be keeping the screen unlocked when an Hangouts call is active.

Unable to reproduce this issue on Ubuntu 14.04 and this issue may reproduce on Ubuntu 17.10 and 18.4 as per comment #0 and 4 which are not available here.
Hence, requesting MTV team to look into this issue for further triage.

Thank you..!!

Requesting more Ubuntu people to reproduce:

https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1732694

Master bug for Ubuntu: https://launchpad.net/bugs/1697373. This is caused by xwayland not supporting DPMS, and chromium skipping the power saving block if DPMS is not supported.

And I confirm that in an X11 session, screen dimming/blanking inhibit works as expected in chromium. It's a wayland-specific problem.

> It's a wayland-specific problem.

Oh true, I haven't come to think it's a Wayland problem! Indeed, I had tested all this under Wayland. Hence, can confirm that only the Ubuntu Wayland session seems to be affected. Sadly, Wayland is the default on Ubuntu now.

Hangouts uses WebRTC.

Removing Blink>WebRTC since this is not WebRTC specific, as per #9 and #10.

The disabling of the power-saving blocking when DPMS is not enabled appears to have been introduced to resolve  bug 111239  , in which power-saving blocking was causing DPMS to be re-enabled even if it had been manually disabled. The root cause of that problem seems to have been a KDE bug: https://bugs.kde.org/show_bug.cgi?id=295164 . The KDE bug has been fixed for a long time (since the end of 2012), so I wonder if this workaround (which is now causing problems on Wayland) is still necessary?

dale, this bug is wayland specific bug. It complains systems turns screensaver mode during video playback. I couldn't repro this bug on my Linux device, The original bug was found during Hangout. 
dcan you assign appropriately?

give to dale to start ball.

This is the same as issue 822035.