r/openbox

Hi, I am trying to get an keybinding for put in ~/.../rc.xml
I like build in screensaver (blank screen) but I can't find from where I can change the time to activate it.
so I was reading in this external webpage https://wiki.archlinux.org/title/Openbox (it isn't mi OS, it is Lubuntu with OB session) that I can use theese lines for a blank screen and lock screen (I don't want lock screen, Just a blank screen):

<keybind key="W-l">
<action name="Execute">
 <command>sh -c 'slock & (sleep .5 && xset dpms force off)'</command>
</action>
</keybind>

What will be the lines just for a blank screen on demand in Bash into rc.xml?
Thank you and Regards!

Right now I have a mixed up situation with some libsecret -related packages installed (Debian) as well as some kwallet-related ones. Kwallet is the one that has a GUI things for it installed, but I'm afraid there may enough of the other installed for there to be some race conditions or some other mess ups that may make some applications use a "brand" of password-management thing or another in a randomly alternating fashion.

Or at least that seems to "fit" with Chrome and Brave browsers seemingly randomly forgetting some passwords and remembering others, as if there were two sets being saved somewhere, or decryption keys for different sets, whatever. Assuming the mess-up is not entirely on the browser-side end of things, which may be too generous an assumption to make.

Between KDE/QT and GNOME/GTK stuff I usually prefer the first, but I'm "okay" with the latter if for some reason they happen to be more standard or reliable.