Firefox : hardware video decoding blocklisted on AMD Radeon RX 6600

[save_linux]

I’m trying to enable hardware video decoding on firefox since several days, with no avail. I’m using firefox 109.0.1 and i have a Radeon 6600, as the title says. I’ve already installed the vaapi mesa package, and i’m using the AMDGPU kernel module driver.

The vainfo output is correct :

Trying display: wayland
Trying display: x11
vainfo: VA-API version: 1.17 (libva 2.17.1)
vainfo: Driver version: Mesa Gallium driver 22.3.5 for AMD Radeon RX 6600 (navi23, LLVM 15.0.7, DRM 3.49, 6.1.11-1-MANJARO)
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointVLD
      VAProfileVP9Profile0            :	VAEntrypointVLD
      VAProfileVP9Profile2            :	VAEntrypointVLD
      VAProfileAV1Profile0            :	VAEntrypointVLD
      VAProfileNone                   :	VAEntrypointVideoProc

I’ve managed to enable hw video decoding on chromium, but only for vp9 profile 0.
I have followed several guides, changed several flags on about:config, but despite this firefox just “blocklist” the gpu on about:support :

Blocklisted by gfxInfo
Bloccato: codice non funzionante FEATURE_HARDWARE_VIDEO_DECODING_DISABLE

media.ffmpeg.vaapi.enabled

is true

media.ffvpx.enabled
media.rdd-vpx.enabled

are false

media.navigator.mediadatadecoder_vpx_enabled

is true as well.

Also

gfx.webrender.all
media.hardware-video-decoding.force-enabled

are true.

[linux-aarhus]

Manjaro has followed upstream mesa and disabled h2xx and related codecs.

If you need those you will need to build a custom mesa package.

You can use the PKGBUILD found at GitHub - mesa-freeworld/mesa-nonfree

[save_linux]

I already know that. The problem is that vp9 (and av1) hw decoding is not working too.

[linux-aarhus]

did you

https://forum.manjaro.org/search?q=how%20to%20hardware%20decoding%20firefox

https://sx.nix.dk/search?q=how%20to%20hardware%20decoding%20firefox

[save_linux]

Yeah, i did a lot of research and followed several guides. Nothing seems to work.

[megavolt]

I use Intel here. Don’t have AV1 hw decoding, but vp9 works fine.

gfx.webrender.all → true
media.ffmpeg.vaapi.enabled → true

Then run it with:

export MOZ_DISABLE_RDD_SANDBOX=1
firefox

In case of wayland you need to set also:

export MOZ_ENABLE_WAYLAND=1

Well then it works.

$ vainfo
Trying display: wayland
vainfo: VA-API version: 1.17 (libva 2.17.1)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 23.1.0 ()
vainfo: Supported profile and entrypoints
      VAProfileNone                   :	VAEntrypointVideoProc
      VAProfileNone                   :	VAEntrypointStats
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Simple            :	VAEntrypointEncSlice
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointEncSlice
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointEncSlice
      VAProfileH264Main               :	VAEntrypointFEI
      VAProfileH264Main               :	VAEntrypointEncSliceLP
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointEncSlice
      VAProfileH264High               :	VAEntrypointFEI
      VAProfileH264High               :	VAEntrypointEncSliceLP
      VAProfileVC1Simple              :	VAEntrypointVLD
      VAProfileVC1Main                :	VAEntrypointVLD
      VAProfileVC1Advanced            :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointEncPicture
      VAProfileH264ConstrainedBaseline:	VAEntrypointVLD
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSlice
      VAProfileH264ConstrainedBaseline:	VAEntrypointFEI
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSliceLP
      VAProfileVP8Version0_3          :	VAEntrypointVLD
      VAProfileVP8Version0_3          :	VAEntrypointEncSlice
      VAProfileHEVCMain               :	VAEntrypointVLD
      VAProfileHEVCMain               :	VAEntrypointEncSlice
      VAProfileHEVCMain               :	VAEntrypointFEI
      VAProfileHEVCMain10             :	VAEntrypointVLD
      VAProfileHEVCMain10             :	VAEntrypointEncSlice
      VAProfileVP9Profile0            :	VAEntrypointVLD
      VAProfileVP9Profile2            :	VAEntrypointVLD

[save_linux]

I’ve put

export MOZ_DISABLE_RDD_SANDBOX=1

on the .profile file;
It still doesn’t work…

[megavolt]

@save_linux

It still doesn’t work…

What makes you think it doesn’t work. Explain it.

@save_linux

but despite this firefox just “blocklist” the gpu on about:support :

Blocklisted by gfxInfo
Bloccato: codice non funzionante FEATURE_HARDWARE_VIDEO_DECODING_DISABLE

I have the same written there

[save_linux]

I’ve checked on about:support, and on the side of the “codec support information” box i have a blank space… furthermore, there is no tool that explicitly says that hw decoding is working, like in chromium.
The CPU load is the same as always.
Edit : after playing a video i got a list like yours. Thank you firefox for your “about:support” page being so confusing and not supportive at all.
Thank you for your patience, megavolt. I hope it will work now.