Whenever I apply updates to my up to date kubuntu system (muon updater 1.3.1), all my screen power settings get cleared. For the past year or so, I've always been running a script:
xset s noblank
xset s off
After every update to prevent my monitor from constantly turning off.
It doesn't matter what muon is updating - any completely unrelated system or package will do - it always clears my settings. It's very odd.
Steps to Reproduce:
Latest Kubuntu, default settings:
1. Wait for little "you have updates" icon to appear
2. Apply updates
3. Wait a minute without keyboard or mouse input
4. Screen goes blank
Screen goes blank
updating unrelated components should not change display settings
While there are underlying issues with KDE not setting DPMS correctly - there are bug reports of all the various ways KDE messes this up - I don't see why muon should be exacerbating the problem.. and it does happen every update, even small ones that don't require a reboot or restart of services or whatever.
*** This bug has been marked as a duplicate of bug 295164 ***