On Tue, Nov 19, 2024 at 12:57 PM Hans <hans.ullr...@loop.de> wrote: > > I am searching the cause of a little issue, which some day appeared. > > The issue is the following: > > In KDE (and maybe other windowmanagers) the screen is going black after a > while of doing nothing. This is especially annoying, when watching a video in > firefox i.e. from youtube or watching a video in VLC. > > I tried several settings in VLC shutting down the screensaver, changesd > settings of powerdevil in KDE and also changed settings of the swcreensaver in > XFCE (which KDE relies on). > > As far as I understood, it might be related to DPMS and less to the > screensaver. > > The strange thing is: When watching a video with "smplayer" or with "mpv", > then the screen is not going blank.
Does smplayer or mpv register a systemd inhibitor? Try: systemd-inhibit --list --no-pager --no-legend > Additionally it is to mention, that only the screen is goiung blank (lights > are out and content freezes). When watching a video and the screen goes dark, > then audio is still going on, showing, the video is going on running. So IMO > it is not a screensaver thing, more a energysaver-thing somehow. > > Maybe it is controlled by the kernel? My guess is systemd is putting the machine to sleep because of a lack of systemd-inhibit. But it is just a guess. > The hints I got, are to disable screen blanking by using the "set screen" > command, although this might be a workaround, It is not what I want. > > Blanking the screen after a while is ok for me, when doing nothing, but when I > am watching video in VLC or in fiirefox, this should be switched off. > > Any ideas, from where this behaviour is controlled? Or some other ideas, like > this could be fixed? > > My hardware is a notebook Lenovo T-520, running debian/stable, fully upgraded. Jeff
