how to disable all built-in screensavers

[GNUser]

I have an X230 ThinkPad with Coreboot, running TCL14-beta x86_64 with Xorg-7.7 and fluxbox.

No screensaver or power manager extension is loaded. Nevertheless, I've noticed that after exactly 10 minutes of inactivity, a fullscreen, opaque, white and vaguely checkerboard overlay appears over my desktop. I'll attach a screenshot (it's not much to see). Touching any key makes it disappear. It doesn't matter if laptop is plugged in or running on battery power.

I already run these commands at every boot, to prevent this kind of shenanigans from Xorg:

Code: [Select]

xset s off
xset -dpms
xset s noblank
There must be another, more sneaky screensaver/powersaver hiding somewhere. Can someone please help me identify it and disable it?

[GNUser]

It was X's fault, after all. Running the above commands a bit later in boot process (sleep 1) fixed the problem.

Sorry for the noise.

[GNUser]

This is the working script that is called from ~/.X.d/

Code: [Select]

#!/bin/sh

sleep 1

# completely disable X's screensaver and DPMS "features":
xset dpms 0 0 0
xset s noblank
xset s off
xset -dpms

ref: https://wiki.archlinux.org/title/Display_Power_Management_Signaling

Problem solved.