Plasma wayland - black screen in Ver 1.1.9-1

[parithy]

Plasma shell fails to launch and in the logs below errors are seen
[destroyed object]: error 7: importing the supplied dmabufs failed
The Wayland connection broke. Did the Wayland compositor die?

similar errors are seen even in systemsettings of KDE

but works if launched with
env QT_QPA_PLATFORM=xcb systemsettings

works fine on intel

[erik-kz]

Could you check what version of Mesa you have installed? As mentioned here http://us.download.nvidia.com/XFree86/Linux-x86_64/515.48.07/README/gbm.html using a GBM-based compositor (such as Kwin) requires at least 21.2.

[parithy]

dpkg -l | grep -i mesa
ii libegl-mesa0:amd64 22.1.3-1ubuntu1 amd64 free implementation of the EGL API -- Mesa vendor library
ii libegl1-mesa-dev:amd64 22.1.3-1ubuntu1 amd64 free implementation of the EGL API -- development files
ii libgl1-mesa-dri:amd64 22.1.3-1ubuntu1 amd64 free implementation of the OpenGL API -- DRI modules
ii libgl1-mesa-dri:i386 22.1.3-1ubuntu1 i386 free implementation of the OpenGL API -- DRI modules
ii libglapi-mesa:amd64 22.1.3-1ubuntu1 amd64 free implementation of the GL API -- shared library
ii libglapi-mesa:i386 22.1.3-1ubuntu1 i386 free implementation of the GL API -- shared library
ii libglu1-mesa:amd64 9.0.2-1 amd64 Mesa OpenGL utility library (GLU)
ii libglu1-mesa-dev:amd64 9.0.2-1 amd64 Mesa OpenGL utility library -- development files
ii libglx-mesa0:amd64 22.1.3-1ubuntu1 amd64 free implementation of the OpenGL API -- GLX vendor library
ii libglx-mesa0:i386 22.1.3-1ubuntu1 i386 free implementation of the OpenGL API -- GLX vendor library
ii libwayland-egl1-mesa:amd64 22.1.3-1ubuntu1 amd64 transitional dummy package
ii mesa-common-dev:amd64 22.1.3-1ubuntu1 amd64 Developer documentation for Mesa
ii mesa-utils 8.5.0-1 amd64 Miscellaneous Mesa utilities -- symlinks
ii mesa-utils-bin:amd64 8.5.0-1 amd64 Miscellaneous Mesa utilities -- native applications
ii mesa-va-drivers:amd64 22.1.3-1ubuntu1 amd64 Mesa VA-API video acceleration drivers
ii mesa-vdpau-drivers:amd64 22.1.3-1ubuntu1 amd64 Mesa VDPAU video acceleration drivers
ii mesa-vulkan-drivers:amd64 22.1.3-1ubuntu1 amd64 Mesa Vulkan graphics drivers
ii mesa-vulkan-drivers:i386 22.1.3-1ubuntu1 i386 Mesa Vulkan graphics drivers

---

dpkg -l | grep -i gbm
ii libgbm1:amd64 22.1.3-1ubuntu1 amd64 generic buffer management API -- runtime

[erik-kz]

Thanks, another thing to confirm is that DRM-KMS is enabled for the nvidia-drm module. Does cat /sys/module/nvidia_drm/parameters/modeset print "Y"?

[parithy]

yes. it does print Y.

when launching apps with env __NV_PRIME_RENDER_OFFLOAD=1 __VK_LAYER_NV_optimus=NVIDIA __GLX_VENDOR_LIBRARY_NAME=nvidia apps like steam, glxgears, are working well

[erik-kz]

Is this a PRIME / hybrid-graphics system? Also, do you have a display attached to the NVIDIA GPU?

[carlosdem]

Hi. Sorry to hijack this thread. I also meet all of the conditions listed above. Mesa 22.3git, kernel 5.19.1, nvidia driver 515.65, Kwin_wayland 5.96.0+p20.04+tunstable+git20220811.0137-0, qtwayland patched from KDE git

My nvidia gpu is the discrete gpu on my laptop. Te external monitor is usb-c which is controlled by the GP107M [GeForce GTX 1050 Ti Mobile].

All qml apps fail to run once kernel modules are loaded with the error "[destroyed object]: error 7: importing the supplied dmabufs failed"

Any advice?

[carlosdem]

scratch that. Upgrading egl-wayland to git master has done the job. Everything works well again.

[lazystone]

Had the same problem - updating to 1.1.10 helped.