current + Atom graphics + drm-next-kmod = random black tiles

[Jakob Alvermark]

Hi,


I am using drm-next-kmod on my Acer E3-112, and it works quite ok for 
daily use.

However, there is one thing that annoys me. Sometimes there are random 
black "tiles".

I use xfce4 as my DE, and sometimes the xfce4-terminal is missing a 
couple of lines of text is missing.

The problem is very visible when using freerdp.

Partial screenshot of what it looks like:

https://photos.app.goo.gl/3MIBwkNaIKuRmN3r2


This machine has a Pentium N3540, so the graphics is "Intel® HD Graphics 
for Intel Atom® Processor Z3700 Series"


How can I help debugging this?


Thanks,

Jakob