SDDM crashes in nixos-unstable

[ambrop72]

Issue description

With the latest channels/nixos-unstable (971b731), the SDDM login does not show up because it crashes. Log:

maj 22 00:28:27 nixos sddm[1222]: Greeter session started successfully
maj 22 00:28:27 nixos sddm-greeter[1267]: High-DPI autoscaling not Enabled
maj 22 00:28:27 nixos sddm-greeter[1267]: Reading from "/nix/store/96jnr69m7shgql6rv18zzwh94l9ad9hc-desktops/share/xsessions/plasma5.desktop"
maj 22 00:28:27 nixos sddm-greeter[1267]: Reading from "/nix/store/96jnr69m7shgql6rv18zzwh94l9ad9hc-desktops/share/xsessions/xfce.desktop"
maj 22 00:28:27 nixos sddm-greeter[1267]: Reading from "/nix/store/96jnr69m7shgql6rv18zzwh94l9ad9hc-desktops/share/xsessions/xterm.desktop"
maj 22 00:28:27 nixos sddm-greeter[1267]: Loading theme configuration from "/run/current-system/sw/share/sddm/themes/breeze/theme.conf"
maj 22 00:28:27 nixos sddm-greeter[1267]: Connected to the daemon.
maj 22 00:28:27 nixos sddm[1222]: Message received from greeter: Connect
maj 22 00:28:27 nixos sddm-greeter[1267]: Loading file:///run/current-system/sw/share/sddm/themes/breeze/Main.qml...
maj 22 00:28:27 nixos sddm-greeter[1267]: QObject: Cannot create children for a parent that is in a different thread.
                                          (Parent is QGuiApplication(0x7ffc969f1f40), parent's thread is QThread(0xec51b0), current thread is QThread(0x13a7ff0)
maj 22 00:28:27 nixos sddm-greeter[1267]: QObject: Cannot create children for a parent that is in a different thread.
                                          (Parent is QGuiApplication(0x7ffc969f1f40), parent's thread is QThread(0xec51b0), current thread is QThread(0x13a7ff0)
maj 22 00:28:27 nixos sddm-greeter[1267]: QObject: Cannot create children for a parent that is in a different thread.
                                          (Parent is QGuiApplication(0x7ffc969f1f40), parent's thread is QThread(0xec51b0), current thread is QThread(0x13a7ff0)
maj 22 00:28:27 nixos sddm-greeter[1267]: QObject: Cannot create children for a parent that is in a different thread.
                                          (Parent is QGuiApplication(0x7ffc969f1f40), parent's thread is QThread(0xec51b0), current thread is QThread(0x13a7ff0)
maj 22 00:28:27 nixos sddm-greeter[1267]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
maj 22 00:28:27 nixos kernel: show_signal_msg: 79 callbacks suppressed
maj 22 00:28:27 nixos kernel: QQmlThread[1269]: segfault at 20 ip 00007fbc710646e0 sp 00007fbc5dd9ce00 error 4 in libQt5Qml.so.5.12.0[7fbc70f2f000+48d000]
maj 22 00:28:27 nixos kernel: Code: c0 48 83 79 20 00 0f 85 6e 01 00 00 49 89 d5 8b 12 4d 89 c7 85 d2 74 22 48 8b 46 08 31 c9 48 8b 00 48 8b 40 10 48 85 c0 75 74 <0>
maj 22 00:28:27 nixos sddm-helper[1259]: [PAM] Closing session
maj 22 00:28:27 nixos sddm-helper[1259]: [PAM] Ended.
maj 22 00:28:27 nixos sddm[1222]: Auth: sddm-helper exited with 11
maj 22 00:28:27 nixos sddm[1222]: Greeter stopped.

Technical details

NVidia drivers with hardware.nvidia.optimus_prime.enable = true.

Tried reverting the update from 0.18.0 0.18.1, did not help. Issue does not exist on 19.03.

[lordcirth]

I have just run into this issue on 20.03 on aarch64.

[stale]

Hello, I'm a bot and I thank you in the name of the community for opening this issue.

To help our human contributors focus on the most-relevant reports, I check up on old issues to see if they're still relevant. This issue has had no activity for 180 days, and so I marked it as stale, but you can rest assured it will never be closed by a non-human.

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[patka-123]

Hello @ambrop72 👋

Is this still an issue? I tried to reproduce it but I'm not able to. If this issue has been resolved for you, would you be able to close this issue?

(I'm going through issues marked as stale to see what can be resolved. If this is still an issue then don't mind me).

[patka-123]

Considering that this issue is stale for a long time and SDDM is an often used program I'm going to make the assumption that this has been fixed by now.

If that was a mistake then please feel free to reopen this issue!