[Bug 101691] gfx corruption on windowed 3d-apps running on dGPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101691

--- Comment #39 from Ethan Hsieh <ethan.hsieh at canonical.com> ---
Created attachment 133862
  --> https://bugs.freedesktop.org/attachment.cgi?id=133862&action=edit
Xorg.0.log (ubuntu 17.04 + intel&amdgpu)

I install Ubuntu 17.4 and can reproduce corruption issue in AC/DC mode.
Xorg.0.log:
[    21.309] (II) LoadModule: "modesetting"
[    21.309] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    21.310] (II) Module modesetting: vendor="X.Org Foundation"

But, the issue in DC mode is gone after I add two config files.

/usr/share/X11/xorg.conf.d/20-intel.conf 
Section "Device"
        Identifier "Intel Graphics"
        Driver "Intel"
        Option "DRI" "3"
EndSection

/usr/share/X11/xorg.conf.d/30-amdgpu.conf 
Section "Device"
        Identifier "AMDGPU"
        Driver "amdgpu"
        Option "DRI" "3"
EndSection

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