no gpu on jellyfin : no /dev/dri/card0, no media.codec

[bachy]

Hi,
on my N100 minipc installed with archlinux (linux-zen kernel)
sddm is lauching cage wich is lauching jellyfin on waydroid

/etc/sddm.conf :

[Autologin]
User=bach
Session=cage-waydroid-jellyfin.desktop

[General]
InputMethod=
DisplayServer=wayland

/usr/share/wayland-sessions/cage-waydroid-jellyfin.desktop :

[Desktop Entry]
Name=Jellyfin (cage Waydroid)
Comment=Launch Jellyfin AndroidTV via Waydroid in Cage
Exec=/usr/bin/cage -- /usr/bin/waydroid app launch org.jellyfin.androidtv
Type=Application
DesktopNames=CageWaydroidJellyfin

It seems to work well for weeks now.
my problem is i think jellyfin is not using harware acceleration (some movies are stuttery on this device exclusivley)

$ lspci
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-N [Intel Graphics]

$ vainfo 
Trying display: wayland 
vainfo: VA-API version: 1.22 (libva 2.22.0) 
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 25.2.6 () 
vainfo: Supported profile and entrypoints
...

$ ls -ls /dev/dri
total 0
0 drwxr-xr-x  2 root root         80 27 août  14:37 by-path
0 crw-rw----+ 1 root video  226,   1 27 août  14:37 card1
0 crwxrwxrwx  1 root render 226, 128 27 août  14:37 renderD128

no /dev/dri/card1

$ sudo waydroid shell ls /dev/dri
renderD128

no media.codec

$ sudo waydroid shell
:/ # dumpsys media.codec
Can't find service: media.codec

maybe my setup is completly wrong, maybe i misted a step, i would appreciate to have some help here.