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stefan11111
l33t
Joined: 29 Jan 2023
Posts: 953
Location: Romania
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 Posted: Mon Feb 17, 2025 2:53 pm Post subject: [SOLVED] Question about vaapi, vdpau and friends on nvidia |
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I recently decided to emerge librewolf and firefox, as palemoon is having some problems.
After installing firefox, I saw this message, which seems to have been added in this commit:
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if use hwaccel && has_version "x11-drivers/nvidia-drivers"; then
optfeature "hardware acceleration with NVIDIA cards" media-libs/nvidia-vaapi-driver
fi
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I was always under the impression that x11-drivers/nvidia-drivers implements all the hw accel in needs, but, at least according to this, it seems to no longer be the case.
After emerging media-libs/nvidia-vaapi-driver, I also took a look at the wiki: https://wiki.gentoo.org/wiki/VAAPI.
On that page, vdpau is also mentioned, so I took a look at that too: https://wiki.gentoo.org/wiki/VDPAU.
So, I started to look into it.
I enabled CONFIG_DRM and friends in the kernel: https://0x0.st/8NCV.txt
I rebuilt the kernel, and nvidia-drivers.
I added nvidia_drm.modeset=1 to the newly generated grub config.
I toggled some stuff in /etc/modprobe.d/nvidia.conf: https://bpa.st/DNUA
I emerged mesa for libgbm.
I reemerged Xorg without USE=minimal
I then did a:
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USE="drm vaapi vdpau nvenc dri egl glx" doas emerge --deep --update --newuse --verbose --ask --keep-going --autounmask-write --with-bdeps=y -X sys-kernel/gentoo-sources @world
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And then I emerged libva, libvdpau, vainfo, vdpauinfo, nvidia-vaapi-driver.
And then rebooted.
This is what happens if I try to run vainfo:
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$ vainfo
Trying display: x11
libva info: VA-API version 1.22.0
libva error: vaGetDriverNames() failed with unknown libva error
vaInitialize failed with error code -1 (unknown libva error),exit
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vdpauinfo does work: https://bpa.st/DODA
I tried to modprobe nvidia_drm, which wasn't automatically loaded, but vainfo still didn't work.
So, what's this about?
have things changed, and nvidia now needs external help with hw accel?
Am I doing something wrong with enabling vaapi?
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INSTALL_MASK="/etc/systemd /lib/systemd /usr/lib/systemd /usr/lib/modules-load.d *udev* /usr/lib/tmpfiles.d *tmpfiles* /var/lib/dbus /usr/bin/gdbus /lib/udev"
Last edited by stefan11111 on Mon Feb 17, 2025 11:36 pm; edited 1 time in total |
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krumpf
Apprentice
Joined: 15 Jul 2018
Posts: 199
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| Posted: Mon Feb 17, 2025 4:45 pm Post subject: |
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Firefox's hwaccel USE flag description points to Mozilla bug 594876, last comment on that page is 4 years old, brings the status "wontfix", and makes me believe the hwaccel flag isn't useful at all nowadays.
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rab0171610
Guru
Joined: 24 Dec 2022
Posts: 478
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| Posted: Mon Feb 17, 2025 8:40 pm Post subject: |
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Consider using the nvidia-vaapi-driver, a "VA-API implemention using NVIDIA's NVDEC":
https://github.com/elFarto/nvidia-vaapi-driver
I have used it for some time.
| Code: | Trying display: wayland
libva info: VA-API version 1.22.0
libva info: User environment variable requested driver 'nvidia'
libva info: Trying to open /usr/lib64/va/drivers/nvidia_drv_video.so
libva info: Found init function __vaDriverInit_1_0
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.22 (libva 2.22.0)
vainfo: Driver version: VA-API NVDEC driver [direct backend]
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileVC1Simple : VAEntrypointVLD
VAProfileVC1Main : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
VAProfileH264Main : VAEntrypointVLD
VAProfileH264High : VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointVLD
VAProfileVP8Version0_3 : VAEntrypointVLD
VAProfileVP9Profile0 : VAEntrypointVLD
VAProfileAV1Profile0 : VAEntrypointVLD
VAProfileHEVCMain10 : VAEntrypointVLD
VAProfileHEVCMain12 : VAEntrypointVLD
VAProfileVP9Profile2 : VAEntrypointVLD
VAProfileHEVCMain444 : VAEntrypointVLD
VAProfileHEVCMain444_10 : VAEntrypointVLD
VAProfileHEVCMain444_12 : VAEntrypointVLD |
It is only going to help with certain types of video when using Firefox. You can try setting "media.hardware-video-decoding.force-enabled" to true in about:config. You can then verify that it is enabled in about:support.
To be honest, I have not noticed any difference in performance or playback, but it might give some users peace of mind knowing their GPU is taking some of the stress off of their CPU. |
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stefan11111
l33t
Joined: 29 Jan 2023
Posts: 953
Location: Romania
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| Posted: Mon Feb 17, 2025 11:36 pm Post subject: |
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With the help of tdr and Plakkis on irc, I was able to figure this out.
Turns out that I had to update nvidia-drivers, enable CONFIG_DRM_TTM_HELPER and make an init script that runs 'modprobe nvidia-drm'.
CONFIG_DRM_TTM_HELPER cannot be directly selected, so it has to be selected by something else.
I used CONFIG_DRM_QXL.
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