Sniffnet crashes when screen color depth is set below 24 bit

[TyseEX]

Is there an existing issue for this?

• I have searched the existing issues.

What's the problem?

I installed Sniffnet on Manjaro Linux from pacman repos and when I tried to launch it, nothing happened.
Then I reinstalled package, but nothing changed. I tried to run Sniffnet in a terminal and got this:

thread 'main' panicked at /build/.cargo/registry/src/index.crates.io-6f17d22bba15001f/iced_tiny_skia-0.12.1/src/window/compositor.rs:56:10:
Create softbuffer surface for window: PlatformError(Some("Visual 0x21 does not use softbuffer's pixel format and is unsupported"), None)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

After trying nvidia-xconfig --depth=24 Sniffnet launched normally.
Is there any way to use Sniffnet with 16-bit color depth?

How did you install the app?

downloaded one of the provided packages

Operating System

Linux

Additional context

No response

[GyulyVGC]

Hi @TyseEX,
the GUI library in use by Sniffnet supports choosing different graphical renderers at runtime via the environment variable ICED_BACKEND.
By default, wgpu is used, but in your case it appears that it's trying to use tiny-skia.
Can you try to set this environment variable to either of these two values and see if it works?

[TyseEX]

Something like this: env ICED_BACKEND=wgpu sniffnet?

[GyulyVGC]

Ok, so the problem is that your graphical adapter doesn't support wgpu and the app is falling back to use tiny-skia.
This issue cannot be solved with the tiny-skia renderer since it appears to be an intrinsic limitation of it.
A possible strategy to solve this would be to try to understand why wgpu isn't working, but if your graphical adapter is up to date, I think there isn't much we can do.

[GyulyVGC]

I think reading this can be of help for your use case: iced-rs/iced#1898

[TyseEX]

I think it may be a solution, but WGPU_BACKEND=vulkan doesn't work and gives the same issue.
A guy, that solved it with nvidia-dkms probably used a driver that was installed from a package. I installed driver from Nvidia official website and my system didn't had any packages except for nvidia-dkms.
The most interesting thing about this is that my package has version 550.107.02-1, when the repositories already have version 555.58.02-15.
pacman -Syu still can't detect version 555, which means I'll probably have to remove the current driver and install a new one from the repositories.
Maybe then the environment variables will work fine, but I need time to check it. Anyway, thanks for helping me solve my problem :)

[GyulyVGC]

No problem!
Let me know when you have some news.

[TyseEX]

Unfortunately, removing the driver and installing it from the repositories did not help in any way. Even the Nvidia package that lies in the repositories is defined as Nvidia-utils, and when you try to install it through pacman -U, it looks for the "Nvidia" package as a dependency, which it itself should be.
Nvidia-dkms from repositories also doesn't help. Probably, this problem is definitely not in the drivers, and it's worth waiting for some solutions from the developers of Iced...

[GyulyVGC]

Yeah... in the meantime I hope it's not a big problem for you to use it with depth 24.

[i-amgeek]

ICED_BACKEND=tiny-skia sniffnet worked for me in resolving this issue.

[GyulyVGC]

Interesting, thanks @i-amgeek

[GyulyVGC]

Something like this: env ICED_BACKEND=wgpu sniffnet?

@TyseEX could you try setting it to tiny-skia as suggested by @i-amgeek?

[TyseEX]

Something like this: env ICED_BACKEND=wgpu sniffnet?

@TyseEX could you try setting it to tiny-skia as suggested by @i-amgeek?

I sold my old GPU and today I bought GTX 1060, but issue didn't gone. Setting backend to tiny-skia craches Sniffnet with the same message:

thread 'main' panicked at /build/.cargo/registry/src/index.crates.io-6f17d22bba15001f/iced_tiny_skia-0.12.1/src/window/compositor.rs:56:10:
Create softbuffer surface for window: PlatformError(Some("Visual 0x21 does not use softbuffer's pixel format and is unsupported"), None)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

wgpu also says GraphicsAdapterNotFound...