Error: Visual 0xb3 does not use softbuffer's pixel format and is unsupported

[wiiznokes]

I have two users who reported this error in my not so used app. I see it is expected to not work but what the story about this ? Is it going to be supported at some point ?

thread 'main' panicked at /run/build/fan-control/cargo/vendor/iced_tiny_skia/src/window/compositor.rs:56:10:
Create softbuffer surface for window: PlatformError(Some("Visual 0xb3 does not use softbuffer's pixel format and is unsupported"), None)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[notgull]

@wiiznokes Can you please share the output of xdpyinfo on the affected system?

[wiiznokes]

xdpyinfooutput.txt

[notgull]

I asked a question to the user on the linked issue: wiiznokes/fan-control#98 (comment)

[orsinium]

I faced the same issue when running the hello world for winit.

Reproduce:

git clone git@github.com:rust-windowing/winit.git
cd winit
cargo run --example window

Output:

2024-05-08T06:29:53.282877Z  INFO window: Starting to send user event every second
2024-05-08T06:29:53.283745Z  INFO window: Loading cursor assets
2024-05-08T06:29:53.284421Z  INFO window: Resumed the event loop
2024-05-08T06:29:53.284437Z  INFO window: Monitors information
2024-05-08T06:29:53.295810Z  INFO window: Primary monitor: HDMI-2
2024-05-08T06:29:53.295828Z  INFO window:   Current mode: 3424x1926 @ 59.950 Hz
2024-05-08T06:29:53.295838Z  INFO window:   Position: 0,0
2024-05-08T06:29:53.295844Z  INFO window:   Scale factor: 2
2024-05-08T06:29:53.295851Z  INFO window:   Available modes (width x height x bit-depth):
2024-05-08T06:29:53.295864Z  INFO window:     2560x1440x24 @ 59.950 Hz
2024-05-08T06:29:53.295873Z  INFO window:     2560x1440x24 @ 74.968 Hz
2024-05-08T06:29:53.295880Z  INFO window:     1920x1080x24 @ 119.982 Hz
2024-05-08T06:29:53.295893Z  INFO window:     1920x1080x24 @ 99.930 Hz
2024-05-08T06:29:53.295900Z  INFO window:     1920x1080x24 @ 60.0 Hz
2024-05-08T06:29:53.295907Z  INFO window:     1920x1080x24 @ 60.0 Hz
2024-05-08T06:29:53.295915Z  INFO window:     1920x1080x24 @ 50.0 Hz
2024-05-08T06:29:53.295922Z  INFO window:     1920x1080x24 @ 59.940 Hz
2024-05-08T06:29:53.295929Z  INFO window:     1280x1440x24 @ 59.912 Hz
2024-05-08T06:29:53.295936Z  INFO window:     1280x1024x24 @ 75.24 Hz
2024-05-08T06:29:53.295943Z  INFO window:     1280x1024x24 @ 60.19 Hz
2024-05-08T06:29:53.295950Z  INFO window:     1440x900x24 @ 59.901 Hz
2024-05-08T06:29:53.295957Z  INFO window:     1280x720x24 @ 60.0 Hz
2024-05-08T06:29:53.295965Z  INFO window:     1280x720x24 @ 50.0 Hz
2024-05-08T06:29:53.295972Z  INFO window:     1280x720x24 @ 59.940 Hz
2024-05-08T06:29:53.295979Z  INFO window:     1024x768x24 @ 119.988 Hz
2024-05-08T06:29:53.295986Z  INFO window:     1024x768x24 @ 75.28 Hz
2024-05-08T06:29:53.295994Z  INFO window:     1024x768x24 @ 70.69 Hz
2024-05-08T06:29:53.296001Z  INFO window:     1024x768x24 @ 60.3 Hz
2024-05-08T06:29:53.296009Z  INFO window:     832x624x24 @ 74.551 Hz
2024-05-08T06:29:53.296016Z  INFO window:     800x600x24 @ 119.971 Hz
2024-05-08T06:29:53.296023Z  INFO window:     800x600x24 @ 72.187 Hz
2024-05-08T06:29:53.296030Z  INFO window:     800x600x24 @ 75.0 Hz
2024-05-08T06:29:53.296038Z  INFO window:     800x600x24 @ 60.316 Hz
2024-05-08T06:29:53.296045Z  INFO window:     800x600x24 @ 56.250 Hz
2024-05-08T06:29:53.296052Z  INFO window:     720x576x24 @ 50.0 Hz
2024-05-08T06:29:53.296059Z  INFO window:     720x480x24 @ 60.0 Hz
2024-05-08T06:29:53.296066Z  INFO window:     720x480x24 @ 59.940 Hz
2024-05-08T06:29:53.296073Z  INFO window:     640x480x24 @ 75.0 Hz
2024-05-08T06:29:53.296081Z  INFO window:     640x480x24 @ 72.808 Hz
2024-05-08T06:29:53.296088Z  INFO window:     640x480x24 @ 66.666 Hz
2024-05-08T06:29:53.296095Z  INFO window:     640x480x24 @ 60.0 Hz
2024-05-08T06:29:53.296102Z  INFO window:     640x480x24 @ 59.940 Hz
2024-05-08T06:29:53.296109Z  INFO window:     720x400x24 @ 70.81 Hz
2024-05-08T06:29:53.296293Z  INFO winit::platform_impl::platform::x11::window: Guessed window scale factor: 2
thread 'main' panicked at examples/window.rs:467:46:
failed to create initial window: PlatformError(Some("Visual 0x79 does not use softbuffer's pixel format and is unsupported"), None)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

uname -a:

Linux monolith 5.15.0-105-generic #115-Ubuntu SMP Mon Apr 15 09:52:04 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

xdpyinfo for visual 0x79:

  visual:
    visual id:    0x79
    class:    TrueColor
    depth:    32 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits