(In reply to lxsq131 from comment #46)
> Seems like it's working on Firefox Nightly 101.0a1 (2022-04-06).
> `MOZ_DISABLE_RDD_SANDBOX=0 firefox-trunk
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: VA-API version 1.8.0
> libva info: Trying to open /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so
> libva info: Found init function __vaDriverInit_1_8
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: va_openDriver() returns 0
> ATTENTION: default value of option mesa_glthread overridden by environment.
> ATTENTION: default value of option mesa_glthread overridden by environment.
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: VA-API version 1.8.0
> libva info: Trying to open /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so
> libva info: Found init function __vaDriverInit_1_8
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: va_openDriver() returns 0`
>
> cat /sys/kernel/debug/dri/0/amdgpu_pm_info return VCN:Enabled. That indicates Hardware decoding are working.
No. I tried again and the error was back. Still needs to disable RDD sandbox. Firefox Nightly 101.0a1 (2022-04-06).
```
libva info: VA-API version 1.8.0
libva info: Trying to open /opt/amdgpu/lib/x86_64-linux-gnu/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_1_8
ATTENTION: default value of option mesa_glthread overridden by environment.
/usr/share/libdrm/amdgpu.ids: Permission denied
libva info: va_openDriver() returns 0
```
(In reply to lxsq131 from comment #46) RDD_SANDBOX= 0 firefox-trunk lib/x86_ 64-linux- gnu/dri/ radeonsi_ drv_video. so lib/x86_ 64-linux- gnu/dri/ radeonsi_ drv_video. so debug/dri/ 0/amdgpu_ pm_info return VCN:Enabled. That indicates Hardware decoding are working.
> Seems like it's working on Firefox Nightly 101.0a1 (2022-04-06).
> `MOZ_DISABLE_
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: VA-API version 1.8.0
> libva info: Trying to open /opt/amdgpu/
> libva info: Found init function __vaDriverInit_1_8
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: va_openDriver() returns 0
> ATTENTION: default value of option mesa_glthread overridden by environment.
> ATTENTION: default value of option mesa_glthread overridden by environment.
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: VA-API version 1.8.0
> libva info: Trying to open /opt/amdgpu/
> libva info: Found init function __vaDriverInit_1_8
> ATTENTION: default value of option mesa_glthread overridden by environment.
> libva info: va_openDriver() returns 0`
>
> cat /sys/kernel/
No. I tried again and the error was back. Still needs to disable RDD sandbox. Firefox Nightly 101.0a1 (2022-04-06). lib/x86_ 64-linux- gnu/dri/ radeonsi_ drv_video. so libdrm/ amdgpu. ids: Permission denied
```
libva info: VA-API version 1.8.0
libva info: Trying to open /opt/amdgpu/
libva info: Found init function __vaDriverInit_1_8
ATTENTION: default value of option mesa_glthread overridden by environment.
/usr/share/
libva info: va_openDriver() returns 0
```