Arch Linux

neilsimp1

Member

Registered: 2019-01-20

Posts: 12

KDE Lock screen and Energy Saver Issue

I'm having a few issues with KDE's lock screen and powering off my monitors. This has persisted since I installed the OS, over several versions of KDE.

If I disable the Screen Energy Saving (auto-turn off monitors) setting and let the Lock Screen turn on on a timer, everything works correctly.

My first issue:

If I enable Screen Energy Saving after 1 minute just to test, my two monitors do indeed turn off, but they cycle through their input modes, get back to HDMI, and turn right back on to show my desktop.

`xset dpms force off` does the same thing. Once the monitors cycle through their inputs the desktop comes back up.

Second issue:

If I have both the Lock Screen turn on on a timer and the monitors get shut off, I get a lock screen present on one of my two monitors. The password box is there, but I cannot type in it. The mouse responds, I can toggle show/hide password, but I cannot type in the box or get focus in it. Worse still, if I try to Switch to a new session (session manager set to restore previous session), it just brings me back to the lock screen.

I have to `loginctl unlock-session` from a tty to get back in.

1. Can anybody tell me why KDE is unable to keep my monitors off?
2. Why can't I type my password into my lock screen? To be clear, the lock screen accepts passwords fine, but after the monitors try to turn of, it stops working.

OS: Arch Linux 5.0.5-arch1-1-ARCH
GPU: AMD ATI Radeon RX 580
Monitors: Acer H236HL 2X on HDMI
DE: KDE Plasma 5.15.3

FWIW, screen locking/auto-off works in my Win10 VM with GPU passthrough, just not in the Arch host. This also works on my Kubuntu machine, which has one HDMI monitor.

neilsimp1

Member

Registered: 2019-01-20

Posts: 12

Re: KDE Lock screen and Energy Saver Issue

Bump???

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 21,668

Re: KDE Lock screen and Energy Saver Issue

Don't do that

If you want to bump try to find some new information. And try to add something meaningful. Since a simple xset runs into the same issue, it is more likely that the cause is some more lower level interaction between your monitors and your graphics card, rather than an issue in KDE.

Post a

sudo journalctl -b

and a xorg.log in [ code ] tags after reproduction of the issue.

neilsimp1

Member

Registered: 2019-01-20

Posts: 12

Re: KDE Lock screen and Energy Saver Issue

Don't do that

Sorry, I scanned https://bbs.archlinux.org/viewtopic.php?id=130309 for bumping rules but didn't see it on that other page.

I rebooted and ran xset so I could post a clean journalctl and my monitors actually stayed off! I turned on Energy Savings and that is working too, and I'm able to log in fine from the lock screen.
Literally all of my problems just worked fine.

This must be do to recent updates, I was testing last weekend and I still had problems, and haven't changed any settings since.

Should I mark as [Solved] or not, since I don't know what happened to fix this?