Kwin_wayland_drm: atomic commit failed: Invalid argument

Issues & Assistance
1

Hello,

I just installed CachyOS Desktop Edition. After the installation, I tried logging in with KDE Plasma Wayland but only got a black screen with a cursor.
I ran sudo cachyos-bugreport.sh, but the terminal disappeared, and I lost the HDMI signal. I managed to save the report by pressing “y” before restarting.

The error message is: “kwin_wayland_drm: atomic commit failed: Invalid argument.”

I have a Lenovo laptop using only my NVIDIA 4060 with the 560 drivers. I tried these commands:

Edited
/etc/modprobe.d/nvidia.conf
to add
options nvidia_drm modeset=1 fbdev=1
Edited
/etc/mkinitcpio.conf
to modify
MODULES=(btrfs nvidia nvidia_modeset nvidia_uvm nvidia_drm)

None of these worked. I’m sharing a Mega link to my bug report file. Thanks for reading, and I hope this helps solve similar issues.
Link :

Best regards.

2

Could you check if cat /etc/profile.d/nvidia-rt3d-workaround.sh is present?

The mkinitcpio you dont need to modify, this is done by /etc/mkinitcpio.conf.d/chwd.conf

Edit: Also, when did you the installation?

3

The file is indeed present, and it shows: export __EGL_VENDOR_LIBRARY_FILENAMES=/usr/share/glvnd/egl_vendor.d/50_mesa.json. I didn’t know about mkinitcpio!
Thanks for the info, but now I don’t have the exact default module anymore. By the way, I did the installation yesterday morning (Paris time) with the ISO 240714.

4

Alright ,we have yesterday evening (German Time) pushed a some fixes to the hardware detection. This should have been fixed the detection and installation of these file.

Feel free to remove it with:
sudo rm -rf /etc/profile.d/nvidia-rt3d-workaround.sh

and then reboot.

5

Thank you so much, it works! Oh man, seriously, you guys are awesome, God bless you!