screen turns black after 10 minutes regarless of screensaver settings

Originally created by Tails on #5617 (Redmine)

The default screensaver waiting time in Tails is set to 30 minutes, nonetheless the screen turns black after 10 minutes at most.

Running xset -dpms s off fixes this behavior. We should fix that in the ISO somewhere…

Feature Branch: bugfix/disable-dpms

Edited May 15, 2020 by import-from-Redmine

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