AMD Cinnamon Wayland session falls back to OpenGL software-rendering (`llvmpipe`)

Is this a new report?

Yes

System Info

Void 6.18.49_1 x86_64 AuthenticAMD uptodate rrrm

Package(s) Affected

cinnamon-6.6.7_1, cinnamon-all-6.6.0_1, elogind-252.39_1, lightdm-1.32.0_8, dbus-1.16.2_2, mesa-dri-26.1.8_1

Does a report exist for this bug with the project's home (upstream) and/or another distro?

No response

Expected behaviour

LightDM is supposed to launch cinnamon wayland session and do the output on $ inxi -G such as:

Linux Mint Cinnamon-edition live-boot test

Graphics:
  Device-1: AMD Renoir [Radeon RX Vega 6 ] driver: amdgpu v: kernel
  Device-2: Chicony Integrated Camera driver: uvcvideo type: USB
  Display: wayland server: X.Org v: 23.2.6 with: Xwayland v: 23.2.6 driver:
    X: loaded: amdgpu unloaded: fbdev,modesetting,vesa dri: radeonsi gpu: amdgpu
    resolution: 1920x1080~60Hz
  API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast
    platforms: gbm,wayland,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa
    v: 25.0.7-0ubuntu0.24.04.2 renderer: AMD Radeon Graphics (radeonsi renoir
    ACO DRM 3.61 6.14.0-37-generic)
  API: Vulkan v: 1.3.275 drivers: N/A surfaces: xcb,xlib,wayland

(Cinnamon 6.6.4)

Actual behaviour

LightDM working without issues only in X11 session, but when you trying to launch the cinnamon-wayland session:
LightDM shows black screen for a second then crashes back into the sign-in graphic-interface without any feedback. I was able to fix this by changing a setting in the file /usr/share/wayland-sessions/cinnamon-wayland.desktop changing the Exec= parameter from the Exec=cinnamon-session-cinnamon --wayland to the Exec=env XDG_SESSION_TYPE=wayland EGL_PLATFORM=wayland GBM_BACKEND=dri dbus-run-session cinnamon-session-cinnamon --wayland, and the wayland session have started successfully then, but in glxinfo or in inxi -G I can see that the OpenGL graphics falls back onto the llvmpipe renderer:

$ inxi -Gxx
Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Renoir [Radeon Vega Series /
    Radeon Mobile Series] vendor: Lenovo driver: amdgpu v: kernel arch: GCN-5
    pcie: speed: 8 GT/s lanes: 16 ports: active: eDP-1
    empty: DP-1,DP-2,HDMI-A-1 bus-ID: 07:00.0 chip-ID: 1002:1636 temp: 49.0 C
  Device-2: Chicony Integrated Camera driver: uvcvideo type: USB rev: 2.0
    speed: 480 Mb/s lanes: 1 bus-ID: 6-2:2 chip-ID: 04f2:b724
  Display: wayland server: X.org v: 1.21.1.24 with: Xwayland v: 24.1.13
    driver: X: loaded: amdgpu unloaded: fbdev,modesetting,vesa alternate: fglrx
    dri: radeonsi gpu: amdgpu display-ID: 0
  Monitor-1: eDP-1 model: Lenovo 0x40a9 res: 1920x1080 dpi: 158
    diag: 355mm (14")
  API: OpenGL v: 4.6 vendor: mesa v: 26.1.8 glx-v: 1.4 es-v: 3.2
    direct-render: yes renderer: llvmpipe (LLVM 21.1.7 256 bits)
    device-ID: ffffffff:ffffffff display-ID: :0.0
  API: Vulkan v: 1.4.350 surfaces: N/A device: 0 type: integrated-gpu
    driver: mesa radv device-ID: 1002:1636
  API: EGL Message: EGL data requires eglinfo. Check --recommends.
  Info: Tools: api: glxinfo,vulkaninfo x11: xdpyinfo, xprop, xrandr

Steps to reproduce

1. Install all listed packages and mesa drivers for your Ryzen 5 Pro 4650U

• cinnamon-6.6.7_1
• cinnamon-all-6.6.0_1
• elogind-252.39_1
• lightdm-1.32.0_8 or SDDM, behavior with the render would be the same.
• dbus-1.16.2_2

2. launch dbus and lightdm via $ sudo ln -s /etc/sv/dbus /var/service/ && sudo ln -s /etc/sv/lightdm /var/service/

3. enter X11-cinnamon session, tap in terminal $ inxi -G and see:

Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Renoir [Radeon Vega Series /
    Radeon Mobile Series] driver: amdgpu v: kernel
  Device-2: Chicony Integrated Camera driver: uvcvideo type: USB
  Display: x11 server: X.Org v: 21.1.24 with: Xwayland v: 24.1.13 driver: X:
    loaded: amdgpu unloaded: fbdev,modesetting,vesa dri: radeonsi gpu: amdgpu
    resolution: 1920x1080~60Hz
  API: OpenGL v: 4.6 vendor: amd mesa v: 26.1.8 renderer: AMD Radeon
    Graphics (radeonsi renoir ACO DRM 3.64 6.18.49_1)
  API: Vulkan v: 1.4.350 drivers: radv surfaces: N/A
  API: EGL Message: EGL data requires eglinfo. Check --recommends.
  Info: Tools: api: glxinfo,vulkaninfo x11: xdpyinfo, xprop, xrandr

4. logout from the X11 session and login into the cinnamon wayland experimental session, and see the llvmpipe as renderer in inxi -G or glxinfo.

Additional info:

$ groups
user wheel audio video
$ sudo usermod -aG render user
usermod: group 'render' does not exist

$ ls -l /dev/dri/
итого 0
drwxr-xr-x  2 root root        80 сен  3 17:27 by-path
crw-rw----+ 1 root video 226,   0 сен  3 17:27 card0
crw-rw-rw-  1 root video 226, 128 сен  3 17:27 renderD128

$ LIBGL_ALWAYS_DRI3=1 eglinfo -p wayland | grep Renderer
libEGL warning: failed to get driver name for fd -1libEGL warning: MESA-LOADER: failed to retrieve device informationlibEGL warning: failed to get driver name for fd -1

$ eglinfo | grep -E "Platform|Renderer"
_amdgpu_device_initialize: amdgpu_query_info(ACCEL_WORKING) failed (-13)libEGL warning: egl: failed to create dri2 screenlibEGL warning: DRI3 error: Could not get DRI3 devicelibEGL warning: Ensure your X server supports DRI3 to get accelerated renderingPlatform Device platform:Platform Device platform:

Start with /usr/share/wayland-sessions/cinnamon-wayland.desktop and compare the default Exec= entry with the working environment override described in the report. Reproduce the LightDM or SDDM Wayland login, then check eglinfo, glxinfo, or inxi -G for the renderer. Done means the Cinnamon Wayland session starts and uses the AMD renderer instead of llvmpipe.