Cannot login after long AFK at lock screen with monitor off

Issues & Assistance
21

Been having this problem with my system also for quite awhile now, and it’s really starting to piss me off. I have to hit the esc key a few times before my monitor wakes again and sometimes it takes multiple key presses before it even wakes, my computer is not set to sleep just the monitor is set to turn off,

I leave my computer and come back and same problem every time no matter how many updates or fresh installs, it’s a persisting problem I really hope gets fixed somehow because I’m tired of having to keep pressing keys multiple times to wake my monitor.

22

Same here. It’s been months, and I can’t leave my PC for more than five minutes because if the monitor turns off, it’s like Russian roulette whether it will work when I return or not.

As many have already said, changing the settings to prevent locking or sleeping doesn’t help. It seems to do whatever it wants.

Sometimes the monitor turns on with a blank screen. Returning to the lock screen and entering the password does nothing. Other times, it returns with an ultra-low resolution, and the system recognizes the monitor as “unknown,” so I have to restart the system to get it back to normal.

This is really getting on my nerves. It’s hard to keep using CachyOS as my main driver if nothing is done about it.

23

Yeah, this post got lost with time. I only noticed it again after a false positive on the report.

For anyone affected, please try plasma-login-manager instead of sddm.

sudo pacman -S plasma-login-manager
sudo systemctl disable sddm.service
sudo systemctl enable plasmalogin.service

If this doesn’t work, please open an issue in GitHub so I can track it properly. Thanks.

24

Well i don’t have much knowledge but i did install the plasma-login-manager (sudo pacman -S plasma-login-manager) but after try to enable it (sudo systemctl enable plasma-login-manager.service) it say the services doesn’t exists… but disable the sddm.service anyway and now i’m reinstalling 8/ bacause i’m stuck on black screen after reboot heheheh.

25

Today, I used power management to configure a desktop so that the monitor turns off after 20 minutes and the PC goes into standby.

Just breathe on the mouse or press a key, and everything returns. The LAN connection takes a brief moment.

27

I tried give a another error… Say there is not a plasma.login.manager.service to start lol and if you try the enable say the services don’t exists.

I check if the plasma.login.manager.services was installed and it is i even tried download directly from AUR and makepkg but nothing changes.

Then i tried to sudo plasmalogin and for some reason break another installation too me i’m locked out again hehehe…

29

Oh… my bad it’s sudo systemctl enable plasmalogin. You didn’t have to reinstall FYI, just boot into TTY and reenable SDDM. I’ll edit the original message.

30

It works after you edit the instructions. plasmalogin is enabled, and sddm is disabled.

So far, it seems to work. At least once, when my PC was unattended, it turned off the monitor, USBs, and even the network card. It woke up just fine after pressing Enter on the keyboard, returning to the login screen. I entered the password and accessed the KDE environment normally. I’ll keep using it for a couple more days to see if it truly fixes the problem, as many have mentioned that the issues don’t always occur, so that one success could just be luck, right? Anyway, thanks for now. Let’s hope it’s a solid fix.

31

It’s been a week since I started running Cachy with plasmalogin.service, and it seems to have fixed the problem of the PC not “waking up” properly. However, there’s a caveat: after about 10–15 minutes, the PC tries to enter “sleep to RAM” mode, but something goes very wrong. The CPU and GPU somehow get pegged at 100%. I discovered this after leaving my PC unattended for 1–2 hours—when I returned, things were really hot! I tested it a couple more times, and it seems to trigger this problem consistently. Luckily, the PC always wakes up, even after this “stress test,” and returns to the desktop. To fix this, I disabled the sleep-to-memory option in the power settings, and now it works well.

That’s it—the issue is fixed, but not 100%. It’s already much better than not knowing if the PC will recover after being left unattended. Maybe this information can help you ninjas figure out what’s going on.

32

It should be:

sudo pacman -S plasma-login-manager
sudo systemctl disable sddm.service
sudo systemctl enable plasmalogin.service

Otherwise I get the error:

Failed to enable unit: File ‘/etc/systemd/system/display-manager.service’ already exists and is a symlink to /usr/lib/systemd/system/sddm.service

33

Yeah… thanks for that.

34

Any idea how I can configure plasma-login-manager? Wallpaper, resolution, etc?

Github page says:

    1. Plasma Login is configured by users through /etc/plasmalogin.conf, which overrides distro-provided defaults at /usr/lib/plasma-login/defaults.conf. In managed scenarios, the latter file can be modified to set a default wallpaper or login session, with the settings module disabled via Kiosk.
    2. I get there is no user file in /etc/, but I also have no default file in /usr/lib/plasma-login/ - I don’t even have that folder!

But I do no have either of those files. I get I’d probably need to create /etc/plasmalogin.conf, but where can I get a template? I don’t even have a /usr/lib/plasma-login/ folder after installing plasma-login-manager via pacman. Is it loading defaults from another location or from SDDM?

35

“10 Minutes left to unlock”…

i have this Problem with Cinnamon here, RTX 3070 driver 590.48.01,

would be very great that it fixed in next future-time.

Thats not nice the last time, to have this issue, it’s not nice that we must reboot the system.

best regards