Wayland launch failure on NVIDIA 3070 via optimus

[Qubitium]

Linux: 6.0.8 kernel Fedora 38 rawhide
Deskto: KDE Plasma (wayland)

#launched on nvidia 3070 via optimus env switch
#launching on igu amd 680m 6800hs has no issue
 __NV_PRIME_RENDER_OFFLOAD=1  /home/diego/.cargo/bin/alacritty -vv

#confirmed alacritty is bound to nvidia gpu
(base) [diego@MiWiFi-RB06-srv ~]$ nvidia-smi
Tue Jan  3 12:28:15 2023       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 525.60.11    Driver Version: 525.60.11    CUDA Version: 12.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  NVIDIA GeForce ...  Off  | 00000000:01:00.0 Off |                  N/A |
| N/A   48C    P8    12W /  N/A |      5MiB /  8192MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|    0   N/A  N/A     46750      G   ...iego/.cargo/bin/alacritty        4MiB |

[0.000001743s] [INFO ] [alacritty] Welcome to Alacritty
[0.000067847s] [INFO ] [alacritty] Version 0.11.0
[0.000088776s] [INFO ] [alacritty] Running on Wayland
[0.000234178s] [INFO ] [alacritty_config_derive] No config file found; using default
[0.000570638s] [DEBUG] [alacritty] Loading "monospace" font
[0.007372359s] [DEBUG] [crossfont] Loaded Face Face { ft_face: Font Face: Regular, load_flags: TARGET_LIGHT, render_mode: "Lcd", lcd_filter: 1 }
[0.008381909s] [DEBUG] [crossfont] Loaded Face Face { ft_face: Font Face: Bold, load_flags: TARGET_LIGHT, render_mode: "Lcd", lcd_filter: 1 }
[0.009362214s] [DEBUG] [crossfont] Loaded Face Face { ft_face: Font Face: Regular, load_flags: NO_BITMAP | TARGET_LIGHT, render_mode: "Lcd", lcd_filter: 1 }
[0.010330316s] [DEBUG] [crossfont] Loaded Face Face { ft_face: Font Face: Bold, load_flags: NO_BITMAP | TARGET_LIGHT, render_mode: "Lcd", lcd_filter: 1 }
[0.011090949s] [DEBUG] [alacritty] Estimated scaling factor: 1
[0.011099205s] [DEBUG] [alacritty] Estimated window size: None
[0.011102321s] [DEBUG] [alacritty] Estimated cell size: 9 x 21
[0.011964615s] [DEBUG] [crossfont] Loaded Face Face { ft_face: Font Face: Regular, load_flags: TARGET_LIGHT, render_mode: "Lcd", lcd_filter: 1 }
[0.046511418s] [INFO ] [alacritty] Running on NVIDIA GeForce RTX 3070 Ti Laptop GPU/PCIe/SSE2
[0.046530384s] [INFO ] [alacritty] Using OpenGL ES 2.0 renderer
[0.046586318s] [INFO ] [alacritty] Using dual source blending
[0.047482075s] [INFO ] [alacritty] Display scale factor: 1
[0.047492324s] [DEBUG] [alacritty] Filling glyph cache with common glyphs
[0.049876026s] [INFO ] [alacritty] Cell size: 9 x 21
[0.049889441s] [INFO ] [alacritty] Padding: 0 x 0
[0.049892577s] [INFO ] [alacritty] Width: 800, Height: 600
[0.050028070s] [INFO ] [alacritty] PTY dimensions: 28 x 88
[0.051589483s] [INFO ] [alacritty] Initialisation complete
[destroyed object]: error 7: importing the supplied dmabufs failed
thread 'main' panicked at 'failed to dispatch wayland event queue: Os { code: 71, kind: Uncategorized, message: "Protocol error" }', /home/diego/.cargo/registry/src/github.com-1ecc6299db9ec823/alacritty-0.11.0/src/event.rs:1438:30
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[chrisduerr]

[0.046530384s] [INFO ] [alacritty] Using OpenGL ES 2.0 renderer

This is already pretty surprising. You should be using the OpenGL 3.3+ renderer with a 3070.

The protocol issue itself is usually a Wayland thing, so I doubt this helps, but could you try the latest master and set the renderer to glsl3 (https://github.com/alacritty/alacritty/blob/master/alacritty.yml#L895)?

[kchibisov]

The latest master will use OpenGL 3.3 renderer automatically.

[kchibisov]

Closing due to lack of any responses, if you still have the issue with at least 0.12.1 let us know. But be sure to use latest nvidia drivers.