[Bug 81623] Intel DRI3 driver hangs WebKitGTK

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81623

--- Comment #16 from Eero Tamminen <eero.t.tamminen at intel.com> ---
(In reply to Bastien Nocera from comment #14)
> But I'm not sure whether that's not DRI3 being disabled at the X level:
...
> Mar 01 15:35:25 classic /usr/libexec/gdm-x-session[1697]: (II) intel(0):
> direct rendering: DRI2 DRI3 enabled

DRI3 support is built into driver.

> Mar 01 15:35:25 classic /usr/libexec/gdm-x-session[1697]: (II) GLX:
> Initialized DRI2 GL provider for screen 0

Intel DDX defaults currently to DRI2, you can set DRI3 default in X config:
--------------------------
Section "Device"
    Driver "Intel"
    Identifier "Intel"
    Option "DRI" "3"
EndSection
--------------------------

If you run the application with LIBGL_DEBUG=verbose, Mesa will tell which DRI
version is used:
--------------------------
$ LIBGL_DEBUG=verbose glxgears 
libGL: Using DRI3 for screen 0
--------------------------

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