Ubuntu
libvdpau package

Can't play video X.org on Ubuntu 21.04

Bug #1927773 reported by Ricardo Almeida
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
libvdpau (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

I have upgraded my Lenovo Z50-75 (AMD A10-7300 with integrated Radeon R6 GPU) from Ubuntu 20.10 to Ubuntu 21.04 and can no longer play videos with mplayer (nor vlc) when using X.org (that I need to use Cinnamon but I've tried without Cinnamon and seems to be X.org related).

Description: Ubuntu 21.04
Release: 21.04
mplayer:
  Installed: 2:1.4+ds1-1
vlc:
  Installed: 3.0.12-3

If I login using Ubuntu on X.org, I'm unable to play videos with mplayer nor vlc.

I downloaded sample video from https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4

The video plays ok if seen in Firefox.

If I try to use mplayer, the window opens, the sound plays but no video. On the console lots of errors like:

[vdpau] Error when calling vdp_video_surface_put_bits_y_cb_cr: No backend implementation could be loaded.
A: 0.2 V: 0.0 A-V: 0.250 ct: 0.000 0/ 0 ??% ??% ??,?% 0 0

If I try to use vlc, similar thing happens. The sound plays but no video. On the console lots of errors like:

[h264 @ 0x7f48ecce3640] hardware accelerator failed to decode picture

On Ubuntu 20.10 it was working ok.

Tags: bot-comment
Revision history for this message
Ubuntu Foundations Team Bug Bot (crichton) wrote :

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tags: added: bot-comment
Ricardo Almeida (ric-almeida)
affects: ubuntu → mplayer (Ubuntu)
Revision history for this message
Ricardo Almeida (ric-almeida) wrote :

Just to note, if I login using Wayland, mplayer plays the video correctly.

On Wayland, some error messages appear but it seems to fallback to a correct decoder:

X11 error: BadMatch (invalid parameter attributes)
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 58.91.100 (external)
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================

Revision history for this message
Ricardo Almeida (ric-almeida) wrote :

Ok, it fails both in X.org and in Wayland. In X.org it fails by default and it seems Wayland works because it tries to incorrectly load the nvidia driver...

I looked into what vdpau drivers there are in the system (ls -lah /usr/lib/x86_64-linux-gnu/vdpau/*so)

lrwxrwxrwx 1 root root 25 Apr 7 11:18 /usr/lib/x86_64-linux-gnu/vdpau/libvdpau_nouveau.so -> libvdpau_nouveau.so.1.0.0
lrwxrwxrwx 1 root root 22 Apr 7 11:18 /usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r300.so -> libvdpau_r300.so.1.0.0
lrwxrwxrwx 1 root root 22 Apr 7 11:18 /usr/lib/x86_64-linux-gnu/vdpau/libvdpau_r600.so -> libvdpau_r600.so.1.0.0
lrwxrwxrwx 1 root root 26 Apr 7 11:18 /usr/lib/x86_64-linux-gnu/vdpau/libvdpau_radeonsi.so -> libvdpau_radeonsi.so.1.0.0

If I set the driver to any "r" driver (e.g. export VDPAU_DRIVER=r600), then if fails the same way that is failing X.org

Revision history for this message
Ricardo Almeida (ric-almeida) wrote :

As a workaround, I added to my .bashrc

export VDPAU_DRIVER=none

This way, it gives an error and fallbacks correctly to ffmpeg on X.org

Ricardo Almeida (ric-almeida)
affects: mplayer (Ubuntu) → libvdpau (Ubuntu)
Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in libvdpau (Ubuntu):
status: New → Confirmed
Revision history for this message
Christian Weiske (cweiske) wrote :

I have the same problem on Ubuntu 20.04 with a ATI Radeon HD5770.
Setting VDPAU_DRIVER=none works here, too.

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