[Bug 100289] 'flip queue failed in radeon_scanout_flip: Invalid argument' error and small frame buffer allocated on turning off and on new monitor

https://bugs.freedesktop.org/show_bug.cgi?id=100289

--- Comment #9 from OmegaPhil@startmail.com --- As nothings happened on this ticket for a few months, I've reached the task again. I can confirm DisplayPort-0 remains connected according to xrandr when its off, prior to the problem happening.

I'm now running Xorg with '-logverbose 255', but nothing more is logged when the problem occurs.

A new failure mode has emerged - sometimes the middle Samsung monitor goes off, and requires disabling and reenabling via the XFCE4 Display program to get it back on again (haven't tried with xrandr etc).

I'm a bit disappointed nothing more is logged by X, I'm going to see what I can find out in XFCE4's tooling.