https://bugs.kde.org/show_bug.cgi?id=461121

--- Comment #1 from Benjamin T <b.terr...@gmail.com> ---
After more investigation it seems linked to recent nvidia drivers.

nvidia-driver-470: OK
nvidia-driver-510: OK
nvidia-driver-515: OK
nvidia-driver-520: Bug
nvidia-driver-515-open: Bug
nvidia-driver-520-open: Bug

When using faulty drivers I have this in dmesg:

GPU 0000:01:00.0: RmInitAdapter failed! (0x63:0x0:1900)
NVRM: GPU 0000:01:00.0: rm_init_adapter failed, device minor number 0
[drm:nv_drm_load [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed
to allocate NvKmsKapiDevice
[drm:nv_drm_probe_devices [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID
0x00000100] Failed to register device

But again, only KDE/Plasma is affected: gnome (x11) and sddm3 can mae use of
the 2 external monitors at the same time.

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