4.0 regression: VDPAU video output fails

Attempting to play video leads to a loop of:

[0000619000080280] main video output debug: Opening vout display wrapper
[00007f1a83c5efe0] main generic debug: looking for vout display module matching "vdpau,none": 1 candidates
[0000616000181880] xcb vout display debug: connected to X11.0 server
[0000616000181880] xcb vout display debug:  vendor : The X.Org Foundation
[0000616000181880] xcb vout display debug:  version: 12013000
[000060e000057e60] main window debug: resized to 853x480
[0000616000181880] xcb vout display debug: using screen 0x1d8
[00007f1a83c5efe0] main generic debug: no vout display modules matched with name vdpau,none
[0000619000080280] main video output error: video output display creation failed

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