On Mon 26 Aug 2024 at 10:29:10 (-0400), gene heskett wrote: > xfce4 desktop, running linuxcnc, [ … ] > 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.
Surely it's not screen /blanking/ that's your problem¹ but screen /locking/. BTW were you really logging back in, or just unlocking the session? > 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 tomas mentioned xset, which should deal with that. You need to decide on whether a couple of seconds is too long to wait for recovery from anything more than simple blanking. > and interpose a login is security against prying eyes in an > office environment. That's the troublesome one for you. > 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. AFAICT you need to investigate XFCE's Power Manager. A quick google turned up these: https://forum.manjaro.org/t/how-to-disable-auto-black-screen/127827/2 https://forum.xfce.org/viewtopic.php?id=13535 https://forum.manjaro.org/t/lock-screen-vs-login-screen/166644 but there may be better ones too. ¹ touch Ctrl, the key at the extreme bottom left of the keyboard, to defeat it. Cheers, David.
