[Wayland-bugs] [Bug 107757] [Regression] Xwayland/Present: Black window with "World of Warcraft" under Wine

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107757

--- Comment #2 from Olivier Fourdan <fourdan at xfce.org> ---
The logs from attachment 141381 are useless, WoW uses multiple windows and
those are from a working case (where the window is decorated/reparented
anyway).

But in the case of the actual game output window (the one which stays black),
we get instead:

q 1 0x1eb93a0        1: 016000bf -> 016000b9 (crtc 0x126f450) flip 1 vsync 0
serial 1
        f 1 0x1eb93a0        1: 016000bf -> 016000b9
        e 1 ust 235274993625 msc 1
        n 1 0x1eb93a0        1: 016000bf -> 016000b9


And that's it!

So present_wmnd does notify and send an event to the client.

On the client side, the backtrace shows it's stuck in `xshmfence_await()`
called from `dri3_get_buffer()` (through `dri3_fence_await()`) but I still
don't understand what prevents that fence from being triggered.

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