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Date:      Sat, 25 Mar 2017 08:33:18 +0000
From:      bugzilla-noreply@freebsd.org
To:        x11@FreeBSD.org
Subject:   [Bug 217886] xorg fails to init GL on stable/11 because of a devel/libdevq bug(?)
Message-ID:  <bug-217886-7141-HaNAcK39It@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-217886-7141@https.bugs.freebsd.org/bugzilla/>
References:  <bug-217886-7141@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217886

--- Comment #3 from holindho@saunalahti.fi ---
(In reply to Matthew Rezny from comment #2)

Good to hear it's getting replaced. Tracing the code from gbm/EGL down to
libdevq revealed plenty of duplicated fragile looking code that attempts to
figure out the device / bus ids.

The root cause of why I'm seeing the problem and many others are not seems =
to
be in the ACPI parser in the kernel. Apple's firmware is probably a little
broken and hands out weird PCI bus entries which, for instance, Linux seems=
 to
skip as invalid, but FreeBSD takes them in, creating an inconsistent PCI de=
vice
tree.=20

However, libdevq's parsing that the patch addresses still seems to me as br=
oken
as the first form does not appear valid at all on 11.0 systems (which just =
fall
back to the older parsing method). I can live with my local patch, though,
until a better libdrm emerges.

--=20
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