Pytorch XPU backand doesn't appears after download and restart.

[ioctl-user]

• [+] I am on a distribution that is at least Ubuntu 20.04+

Describe the bug
Pytorch+XPU backend installed, but doesn't appears on app the restart.

To Reproduce
Install the app with the Flatpak on Linux as root or common user (I have tried both).
Run with command flatpak run --filesystem=~ io.github.tntwise.REAL-Video-Enhancer.
Download Pytorch XPU 2.8.0 backend (I have tried another versions also).
Restart program as it required.
There is not Pytorch backend in the backend download menu.

Expected behavior
Expected, that backend will appear after it was downloaded and app was restared.

Desktop (please complete the following information):

• OS: Current Archlinux x86_64, latest flatpak app version.

GPU
Pytorch, Intel iGPU.

[TNTwise]

I know Xpu works on windows, but only with specific Intel GPUs. What is your GPU?

[ioctl-user]

I know Xpu works on windows, but only with specific Intel GPUs. What is your GPU?

I have Iris Xe.

Even if it's not working, I expect downloaded package should not disappear.

[lamium2]

I can (unfortunately) confirm this. No backend appears after restarting the app. (Arc B580, option pyTorch 2.8.0 + xpu, Debian 13, compiled with cx_freeze)

[TNTwise]

Unfortunately I can't really fix this, as I can only test Xpu on windows due to it being my school laptop. If it doesn't work on Linux, but works on windows, it's most likely something with the xpu dependency I can't control.

[lamium2]

I might try to fix it, as it seems to be fundamentally due to the combination of Intel oneapi and PyTorch. Since Intel only offers Ubuntu and Windows in its instructions, I will probably set up Ubuntu Server and test it there.

However, I am primarily interested in the bare backend CLI to build more complex pipelines with CPU and multi-GPU usage. I would love to separate the CLI and GUI. Maybe I'll contact you about that sometime.

[TNTwise]

It could be a flatpak specific issue, similar to how rocm doesnt work under flatpak.

[ioctl-user]

Unfortunately I can't really fix this, as I can only test Xpu on windows.

May I suggest installing Linux in a VirtualBox or QEMU to test this issue? Sure, if it's possible and acceptable.