Fix OpenGL errors after the lastest xorg update on manjaro32

I noticed some OpenGL errors after the latest update on my manjaro32 (unstable branch). glxinfo would still report acceleration enabled, but this info was preceded by an error (see here for an example).

Other applications would also output an error upon start and get noticeably slower (for example, firefox).

So, I found this post which pointed to a problem related with DRI 3 failed attempts. I can confirm that changing my xorg config file from DRI 3 to DRI 2 fixed this issue.

[isa@ceci-pc ~]$ cat /etc/X11/xorg.conf.d/01-video.conf 
Section "Device"
 Identifier "Device0"
 Driver "radeon"
 BusID "PCI:1:0:0"
 Option "DRI" "2"
 Option "TearFree" "on"
 #Option "EXAPixmaps" "on"
EndSection

Section "DRI"
 Group "video"
 Mode 0666
EndSection

Section "Extensions"
 Option "Composite" "Enable"
 Option "RENDER" "Enable"
EndSection

Section "InputClass"
 Identifier "Keyboard Defaults"
 MatchIsKeyboard "yes"
 Option "XkbOptions" "terminate:ctrl_alt_bksp"
EndSection

Maybe this info can help someone else.

Cheers,

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