[Powerdevil] [Bug 348082] New: monitor is randomly powered back on

[fr.frasc at gmail.com]

https://bugs.kde.org/show_bug.cgi?id=348082

            Bug ID: 348082
           Summary: monitor is randomly powered back on
           Product: Powerdevil
           Version: 5.3.0
          Platform: Kubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: plasma-devel at kde.org
          Reporter: fr.frasc at gmail.com

PM has been configured to turn monitor off after 30 minutes.
Screen locking has been configured to lock screen after 15 minutes and require
a password after 30 seconds.

The screen gets locked as expected, and the monitor is powered off in time.

However, after a seemingly random amount of time, without any event that I can
account for, the monitor wakes up, showing the lock screen.

Tasks might be running in the background (but not always): compilations and/or
virtual machines and/or lengthy wget/curl/rsync

The hardware configuration, is dual monitor. Main monitor, landscape. Second
monitor, portrait, configured to be on the left of main monitor.
OS is Kubuntu 15.04

Reproducible: Sometimes

Steps to Reproduce:
1. Configure Display to lock screens after 15 minutes and require password
after 30seconds.
2. Configure PM to turn monitor off after 30 minutes.
3. Leave the computer totally unattended.

Actual Results:  
Screen will get locked after 15minutes.
Monitor turns off after 30minutes
Monitor randomly turns back on, revealing the lock screen.
Monitor turns off again after some time. Probably 30minutes, but unverified.
The turn off/wake up cycle will loop up to 3 times in one night.

Expected Results:  
Screen will get locked after 15minutes.
Monitor turns off after 30minutes
Monitor stays off until an HID event wakes it up.

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