Plasma 6 crash can't boot into SDDM anymore

fettouhi · Yesterday 13:21:02

I was playing a game on steam earlier today (The First Descendant) after trying to shutdown the game KDE Plasma crashes on me and becomes unresponsive. I try to reboot but nothing works in KDE, I switch to a different tty and do a reboot via (systemctl reboot). Now my system hangs at a black screen and when reaching "starting graphical interface" in the boot process. I tried to boot with the single kernel parameter and that goes into rescue mode for reason? I thought that adding single as a boot parameter would just bypass the graphical boot part and let me reach a tty. Because right now I just get black screen and I can't switch tty or anything. I have no updates of my machine today. I am running KDE Plasma 6 on Wayland with AMD 9060 RX card. To it seems like my KDE session is borked but I can't get it to boot SDDM. Any ideas what to do here?

martinc2 · Yesterday 14:48:15

Did you do an update recently? openexr-3.5.3-2 has an issue which stops SDDM and plasmalogin working. openexr-3.5.3-3 fixes the problem, and is already in the repos.

fettouhi · Yesterday 14:52:19

I did an update yesterday. I have openexr 3.5.3-3 installed now. I got everything working after disabling sddm.service and installing plasma-login-manager. But the login screen is now very sluggish when I type on my keyboard but I can log in and KDE session is fine.

seth · Yesterday 15:11:34

But [plasma-login-manager] is […] very sluggish when I type on my keyboard but I can log in and KDE session is fine.

Retried SDDM?

fettouhi · Yesterday 15:23:32

seth wrote:

But [plasma-login-manager] is […] very sluggish when I type on my keyboard but I can log in and KDE session is fine.
Retried SDDM?

No, for now I have uninstalled sddm and sddm-kcm.

adrianx · Yesterday 16:46:20

I don't use sddm, but I had a similar problem with "plasma greeter" not being shown. What worked for me was to reinstall the package systemd.

Last edited by adrianx (Yesterday 16:49:51)

fettouhi · Yesterday 20:09:14

I reinstalled sddm and sddm-kcm plus systemd just now and enables sddm.service (after turning off plasmalogin.service). Now I can boot my machine just fine again with sddm? Very strange. What is recommended for KDE as of now, SDDM or Plasma Login Manager?

seth · Yesterday 20:15:09

SDDM defaults to X11, afaiu PLM is wayland only - technically you don't need a DM at all, otherwise use any one that works for you.
As for PLM being sluggish, does it leave any errors in the initramfs?

fettouhi · Yesterday 20:42:04

seth wrote:

SDDM defaults to X11, afaiu PLM is wayland only - technically you don't need a DM at all, otherwise use any one that works for you.
As for PLM being sluggish, does it leave any errors in the initramfs?

Where do I check for errors in the initramfs for PLM? Just run journalctl -xb in a tty while I am in PLM?

seth · Yesterday 20:47:10

skip the "-x" but check "sudo journalctl -b" any time after running PLM (eg. after the login)

Arch Linux

#1 Yesterday 13:21:02

Plasma 6 crash can't boot into SDDM anymore

#2 Yesterday 14:48:15

Re: Plasma 6 crash can't boot into SDDM anymore

#3 Yesterday 14:52:19

Re: Plasma 6 crash can't boot into SDDM anymore

#4 Yesterday 15:11:34

Re: Plasma 6 crash can't boot into SDDM anymore

#5 Yesterday 15:23:32

Re: Plasma 6 crash can't boot into SDDM anymore

#6 Yesterday 16:46:20

Re: Plasma 6 crash can't boot into SDDM anymore

#7 Yesterday 20:09:14

Re: Plasma 6 crash can't boot into SDDM anymore

#8 Yesterday 20:15:09

Re: Plasma 6 crash can't boot into SDDM anymore

#9 Yesterday 20:42:04

Re: Plasma 6 crash can't boot into SDDM anymore

#10 Yesterday 20:47:10

Re: Plasma 6 crash can't boot into SDDM anymore

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