[Bug 251836] graphics/mesa-dri Intel IRIS

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251836

oleg.nauman at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |oleg.nauman at gmail.com

--- Comment #2 from oleg.nauman at gmail.com ---
I had the same issue with KDE Plasma5 after updating of mesa ports to 20.2.3, 

cp /usr/local/share/drirc.d/00-mesa-defaults.conf ~/.drirc

fixed my issue with OpenGL compositing in KDE Plasma 5


Some technical details:
Current 13.0 amd64 
modeset(0): glamor X acceleration enabled on Mesa Intel(R) UHD Graphics 620
(KBL GT2) ( Kaby Lake )
modeset(0): [DRI2] Setup complete
modeset(0): [DRI2]   DRI driver: iris
modeset(0): [DRI2]   VDPAU driver: va_gl


Xorg.log diff after "the fix"

# diff -u Xorg.0.log.iris Xorg.0.log
--- Xorg.0.log.iris     2020-12-07 17:33:31.728843000 +0200
+++ Xorg.0.log  2020-12-07 17:33:48.154574000 +0200
@@ -11,7 +11,7 @@
  Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
- (==) Log file: "/var/log/Xorg.0.log", Time: Mon Dec  7 13:13:48 2020
+ (==) Log file: "/var/log/Xorg.0.log", Time: Mon Dec  7 17:01:14 2020
  (==) Using config directory: "/usr/local/etc/X11/xorg.conf.d"
  (==) Using system config directory "/usr/local/share/X11/xorg.conf.d"
  (==) No Layout section.  Using the first Screen section.
@@ -391,9 +391,6 @@
  (**) Logitech USB Receiver: (accel) acceleration threshold: 4
  (II) event5  - Logitech USB Receiver, class 0/0, rev 2.00/22.01, addr 1: is
tagged by udev as: Mouse
  (II) event5  - Logitech USB Receiver, class 0/0, rev 2.00/22.01, addr 1:
device is a pointer
- (II) modeset(0): EDID vendor "AUO", prod id 14573
- (II) modeset(0): Printing DDC gathered Modelines:
- (II) modeset(0): Modeline "1920x1080"x0.0  142.00  1920 2028 2076 2100  1080
1090 1100 1126 -hsync -vsync (67.6 kHz eP)
  (II) modeset(0): EDID vendor "AUO", prod id 14573
  (II) modeset(0): Printing DDC gathered Modelines:
  (II) modeset(0): Modeline "1920x1080"x0.0  142.00  1920 2028 2076 2100  1080
1090 1100 1126 -hsync -vsync (67.6 kHz eP)


I suspect that KDE Plasma 5 expect some hints from mesa, but due to unknown
reasons iris driver can not get them from
/usr/local/share/drirc.d/00-mesa-defaults.conf

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