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Date:      Tue, 04 Jul 2017 14:21:53 +0000
From:      bugzilla-noreply@freebsd.org
To:        x11@FreeBSD.org
Subject:   [Bug 220444] x11-servers/xorg-server crashes on attempt to play a video using VDPAU
Message-ID:  <bug-220444-7141-zfGvwkUtIJ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-220444-7141@https.bugs.freebsd.org/bugzilla/>
References:  <bug-220444-7141@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D220444

--- Comment #11 from Mikhail Teterin <mi@FreeBSD.org> ---
(In reply to Jan Beich from comment #10)
>> Can you try to downgrade to Mesa 17.0.*?=20
> Mikhail, you haven't provided feedback for this question.
I'm sorry, but you indicated (in comment #6), that the alternative to
downgrading is to try DRI2, which I did do -- and reported the success...

The answer to this question is "No, I can not". There are only so many times
per weekend I am willing to restart my entire desktop. Also, the move from
graphics/dri to graphics/mesa-dri (which, BTW, remains unmentioned in MOVED=
),
makes the task more difficult then simply unrolling one revision at a time.

But, I thought, we've identified the true nature of the problem: VDPAU trie=
s to
exercise unimplemented DRI3 code -- unimplemented on all stock versions of
FreeBSD (except, maybe, for NVidia users).

The fix would seem to be to simply check for the missing functionality at t=
he
driver-initialization time and limit the X11-server to DRI2 if xorg.conf do=
es
not provide any other value.

The unimplemented method (createImageFromFds) is not set to junk -- it is t=
he
good old NULL, which means, something set it to that value. Inserting the
additional check into that code seems like an easy enough task for anyone
familiar with the code.

--=20
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