It seems we're loosely in a deadlock on this one...
The i965 VA driver is failing to load because it's using Xwayland.
Xwayland only supports DRI3, while VA-API only supports DRI2. VA-API
does support native Wayland, but that's not being tried by the video
player apps as first preference. You could call it a bug that the apps
choose X instead of Wayland, and that's easily fixable, but according to
the mpv developers people prefer X in the mpv case because a native
Wayland app has no titlebar or window decorations. But by defaulting to
X, it uses Xwayland which does not support the same DRI interface as VA-
API. Hence VA-API initialization fails.
So there are at least a few possible ways forward:
* Implement DRI3 support in libva (unlikely to happen soon); or
* Implement DRI2 support in Xwayland (unlikely to happen ever); or
* Modify each player app to prioritize checking for Wayland before checking
for X11 (rejected by mpv); or
* Modify each player app to try vaInitialize multiple times (different display
types) until one works.
** Also affects: libva (Ubuntu)
Importance: Undecided
Status: New
** Changed in: libva (Ubuntu)
Status: New => In Progress
** No longer affects: libva
** Bug watch added: github.com/01org/libva/issues #79
https://github.com/01org/libva/issues/79
** Also affects: libva via
https://github.com/01org/libva/issues/79
Importance: Unknown
Status: Unknown
** Summary changed:
- i965-va-driver fails to load in a Gnome Shell Wayland session
+ VA-API fails to initialize in a Gnome Shell Wayland session
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https://bugs.launchpad.net/bugs/1698287
Title:
VA-API fails to initialize in a Gnome Shell Wayland session
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