Ubuntu 24.04, dotnet (sdk 8.0.110) & (runtime 8.0.10) Photino.NET template app won't run

[raddevus]

I'm running :
Ubuntu 24.04.1 LTS
dotnet core that is current on that system is:
sdk 8.0.110
runtime 8.0.10

When you use the template to create a project it uses Photino.NET 2.3.0
When you run the template project you will get an errors that state:

`/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.10/libPhotino.Native: cannot open shared object file: No such file or directory

/home/raddev/dev/dotnet/photino/2025/third/bin/Debug/net8.0/libPhotino.Native: cannot open shared object file: No such file or directory`

App Won't Run

The dotnet CLR has tried to find libPhotino.Native and doesn't find it so the app won't run.

I've tried updating Photino.NET to 3.1.17 and 3.2.3 with no luck. I get the same error.

The Workaround Fix

However, I was able to update to Photino.NET 2.6.0 and successfully run the app.

So, the point here is that on Ubuntu 24.04.1 running those versions of .NET I can only use the Photino.NET 2.6.0 library.

[raddevus]

Just tested this on my Debian 12.5 VirtualBox.
THere I am running dotnet SDK 8.0.404
dotnet runtime is 8.0.11.
In this case, I can run Photino.NET 3.2.3
I guess I have to wait until dotnet 8.0.11 comes to Ubuntu. Not sure.

[flyingpie]

@raddevus Could you check whether you have libwebkit2gtk-4.0 installed?

[raddevus]

@flyingpie
It looks like I actually have libwebkit2gtk-4.1

Here you can see that detail in the Photino app I'm working on right now -- which lists all running processes & lets me get their details.

thanks

[flyingpie]

@raddevus Looks nice!

This is an annoying issue, these things are going on:

• Ubuntu 24.04 dropped libwebkit2gtk-4.0, in favor of libwebkit2gtk-4.1
• 4.1 is NOT backwards compatible with 4.0
• Photino still uses version 4.0, moving to 4.1 seems to be under consideration, but it caused some issues on the first attempt

The Tauri guys had the same problem, but Tuari 2 has moved to 4.1, which I suspect would also happen with Photino at some point.
tauri-apps/tauri#9662

23.04

root@a62eae6f5691:/# apt search libwebkit2gtk
libwebkit2gtk-4.0-37/lunar-updates,lunar-security 2.42.4-0ubuntu0.23.04.1 amd64
  Web content engine library for GTK

libwebkit2gtk-4.1-0/lunar-updates,lunar-security 2.42.4-0ubuntu0.23.04.1 amd64
  Web content engine library for GTK

24.04

root@74ce37066d4e:/# apt search libwebkit2gtk
libwebkit2gtk-4.1-0/noble-updates,noble-security 2.46.3-0ubuntu0.24.04.1 amd64
  Web content engine library for GTK

[raddevus]

Great info about this issue. I really appreciate it. It really is an annoying problem.
I'm hoping that Photino will update to 4.1 soon so it'll be resolved.
Thanks again for the info.

[flyingpie]

@raddevus You're welcome!

I've had this issue on one of my machines that's also running 24.04.

I used this workaround, but it's not great. It adds the package repository for the previous release (Jammy). This is not recommended, but it can help until 4.1 is supported by Photino, and you don't want to run VM's.

Add these to /etc/apt/sources.list.d/ubuntu.sources:

Types: deb
URIs: http://nl.archive.ubuntu.com/ubuntu/
Suites: jammy noble-updates noble-backports
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

Types: deb
URIs: http://security.ubuntu.com/ubuntu/
Suites: jammy-security
Components: main restricted universe multiverse
Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg

(Can also use other mirrors ofc).

Then:

apt update
apt install libwebkit2gtk-4.0-37

I'd recommend removing the Jammy repos after this. And not doing this on important production machines, like servers or whatever.

Mixing repositories of multiple releases can cause lots of issues around dependencies, so again, don't do this on really important machines.