On Mon, 26 Aug 2024, gene heskett wrote: > rpib runniing bookworm. Private net. rt-preempt kernel. Security is a > closed garage door and lead projectiles for unwanted guests. > > xfce4 desktop, running linuxcnc, which controls all 255 volt power to an > 11x56" lathe with several horsepower at its disposal. New install, came > across a dangerous situation yesterday. > > Basically using the lathe as a jig to hold a long piece I was tapping by > hand, powered up but stopped. screen blanker came on and locked me out > till I logged back in leaving linuxcnc live but hidden behind a black > screen. This is a dangerous condition if he wrong key is hit to wake it up. > > That monitor AND the idling rpi4b draw about 22 watts, and is turned off > only for maintenance. UPS, standby generator, uptimes might be years. > > Replacing a CRT power hungry monitor means the only reason to blank a > screen and interpose a login is security against prying eyes in an > office environment. > > Soooo, what do I remove to absolutely, permanently disable the screen > blanker? And I mean no chance it can ever do that to me again.
the debian folks do a pretty good job of packaging for most folks you can disable and uninstall till the cows come home the next update and it's right back sometimes you need to treat the system like a child and enforce the rules ls -l /usr/bin/xscreensaver -rwxr-xr-x 1 root root 51536 Mar 3 2023 /usr/bin/xscreensaver i do chmod 644 /usr/bin/xscreensaver chattr +i /usr/bin/xscreensaver this usually works then add this to a file i keep of things i modify
