The burn-in subtitles will become semi-transparent when enable hardware acceleration

[gnattu]

Now I doubt if it is a hardware or firmware bug of your specific iGPU handling the alpha channels.

[Giresharu]

This issue does not provide any relevant log information, and it only reproduces on my server. And I’ve reinstalled Jellyfin many times.
What should I do now?

Can you elaborate on which system your jellyfin run at and which distro you are using? Kernel Version?

Intel arc is still a bit new so there still could be some driver bugs left.

The kernel version inside both the host and the container are: 
Linux NAS 6.1.0-27-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1 (2024-11-01) x86_64 GNU/Linux

I am now preparing to try installing it directly on Debian without using Docker, to see if there is any difference.
=== ===
After testing, the same situation occurs when directly installed on the host. Maybe I should look for clues related to Intel drivers.

[Fate]

This issue does not provide any relevant log information, and it only reproduces on my server. And I’ve reinstalled Jellyfin many times.
What should I do now?

Can you elaborate on which system your jellyfin run at and which distro you are using? Kernel Version?

Intel arc is still a bit new so there still could be some driver bugs left.

The kernel version inside both the host and the container are: 
Linux NAS 6.1.0-27-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1 (2024-11-01) x86_64 GNU/Linux

I am now preparing to try installing it directly on Debian without using Docker, to see if there is any difference.
=== ===
After testing, the same situation occurs when directly installed on the host. Maybe I should look for clues related to Intel drivers.

Any chance you could try something newer?

Like ubuntu 24.10 or manjaro with the 6.11 kernel?

[Giresharu]

This issue does not provide any relevant log information, and it only reproduces on my server. And I’ve reinstalled Jellyfin many times.
What should I do now?

Can you elaborate on which system your jellyfin run at and which distro you are using? Kernel Version?

Intel arc is still a bit new so there still could be some driver bugs left.

The kernel version inside both the host and the container are: 
Linux NAS 6.1.0-27-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1 (2024-11-01) x86_64 GNU/Linux

I am now preparing to try installing it directly on Debian without using Docker, to see if there is any difference.
=== ===
After testing, the same situation occurs when directly installed on the host. Maybe I should look for clues related to Intel drivers.

Any chance you could try something newer?

Like ubuntu 24.10 or manjaro with the 6.11 kernel?

Should I try change the host system environment, or should I switch to a Jellyfin image that uses Ubuntu as its environment? 
It’s not convenient for me to change the host system environment.

[TheDreadPirate]

Do your debian sources pull from non-free and non-free-firmware?

[Giresharu]

Do your debian sources pull from non-free and non-free-firmware?

I installed from the complete DVD ISO image downloaded from the Debian official website.

[TheDreadPirate]

I meant the configs in /etc/apt/sources.list.d/. Your sources would need "non-free" and "non-free-firmware" in the component list. I believe those two components are not included due to Debian only allowing "free" packages, by default.

Code:

deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmware

[Giresharu]

I meant the configs in /etc/apt/sources.list.d/.  Your sources would need "non-free" and "non-free-firmware" in the component list.  I believe those two components are not included due to Debian only allowing "free" packages, by default.

Code:

deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmware

Do you mean "/ect/apt/sources.list.d/docker.list"?
It is:

Code:

deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian  bookworm stable

Or "debian.sources"?
It is:

Code:

Types: deb                                                                                                                                     
URIs: http://deb.debian.org/debian                                                                                                             
Suites: bookworm bookworm-updates                                                                                                               
Components: main contrib non-free-firmware non-free                                                                                             
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg                                                                                       

Types: deb                                                                                                                                     
URIs: http://deb.debian.org/debian-security                                                                                                     
Suites: bookworm-security                                                                                                                       
Components: main contrib non-free-firmware non-free                                                                                             
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg                                                                                                         

[TheDreadPirate]

debian.sources. And it looks like you have all the non-free repos, so that's removes that as a factor.