https://bugs.freedesktop.org/show_bug.cgi?id=109246

--- Comment #8 from Michel Dänzer <michel@daenzer.net> ---
>From the Xorg log file:

[   212.439] (II) AMDGPU(0): Allocate new frame buffer 1440x900
[   212.439] (II) AMDGPU(0):  => pitch 6144 bytes
[   212.639] (II) AMDGPU(0): Allocate new frame buffer 3360x1080
[   212.639] (II) AMDGPU(0):  => pitch 14336 bytes

This does look like there are hotplug events, and the HDMI output is considered
disconnected for a moment.

(In reply to Alex Deucher from comment #5)
> Some monitors poll inputs which sometimes causes the hpd pin to fire which
> looks like a hotplug event to the driver.

Any idea why this seems to only cause trouble with DC though?

(I was seeing similar symptoms with DC and an HDMI connection with Kaveri, I
reported it to the DC developers internally a while ago; it's one reason why
I'm currently not using DC on this machine)

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