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[23.0.102; Issue; Partially Solved] System hibernates while media is playing

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Gatherum:
So I just discovered a problem: I have Xfce Power Manager set to blank the screen after five minutes of inactivity, and hibernate the system after fifteen. The former appears to be successfully prevented while playing back content via MC23, but not the latter. I was just in middle of watching something in full-screen Display View, only for my machine to suddenly hibernate. The Disable display from turning off (useful for HDMI audio) option under Options > Audio is checked.

Is there some other tweak I need to make?

Running Lubuntu 16.0.4 LTS.

Gatherum:
A thought?

Gatherum:
Confirmed that it does this when sleep mode is set to Suspend, as well.

Is this an MC problem, or a Linux configuration problem?

Awesome Donkey:
Kinda sounds like both a system configuration problem to me and also could be a MC problem too. I believe there are workarounds, e.g. using Caffeine while MC is running. The downside, I suppose, is if you have MC running 24/7 and Caffeine enabled all the time, that'd kinda defeat the purpose of having a system to hibernate after 15 minutes. But if you use Caffeine that supports a system tray icon (e.g. the Caffeine-ng fork) you can click the system tray to toggle the enabling/disabling of Caffeine while you're playing back media. If you're using Theater View (or any full screen application), Caffeine *should* be able to detect this if you have it setup and disable the system going to sleep.

Also, by what I mean that it could be a MC problem too, it's possible that the Disable display from turning off (useful for HDMI audio) option doesn't do anything on Linux. Bob would know for sure.

Gatherum:
There appear to be two likely scenarios:


* MC's HDMI option does work, as it prevents screen time-out, but is not configured to prevent hibernation or suspension, as it should.
* MC's HDMI option does not work; however, the Xfce Power Manager strangely regards MC's play-back as activity worth preventing screen time-out, but not hibernation or suspension.
Which do you think is more likely?

I'm willing to consider Caffeine-ng as an option, if I understand it to essentially be a supplement to Xfce Power Manager in the sense that it's better at detecting "activity" and keeping the system on when appropriate. If so, I could configure it to run at start-up as I did with MC and RealVNC Server. If not, there isn't much point, since an always-on system could be achieved by simply turning off all Xfce Power Manager features. :P

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