I am using two different Lenovo laptops and even two different Ubuntu-MATE versions 16.04 and 18.04, yet ever since I started with Ubuntu, I suffer refresh / repaint problems (on a multitude of monitors and docking stations, so let's not blame those...)
If I switch to the next workspace (virtual screens) and back, these artifacts are gone. If I move a window slowly over it, it's also gone. Basically most things triggering a repaint makes it gone. Hastily shaking windows around tends to create them.
I know little about Linux & hardware, but let me share what I know. I appear to have intel graphics:
$> sudo lspci|grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
And DRI2 (what that was again?)
$> xdpyinfo | grep DRI
DRI2
My xorg config (if I am not talking gibberish) does not seem to contain a 20-intel.conf...
$> cat /usr/share/X11/xorg.conf.d/
10-amdgpu.conf 10-quirks.conf 11-evdev-trackpoint.conf 50-vmmouse.conf 51-synaptics-quirks.conf
10-evdev.conf 11-evdev-quirks.conf 50-synaptics.conf 50-wacom.conf
Not sure, what to make of that 10-amdgpu.conf file (Didn't I have intel graphics?)
cat /usr/share/X11/xorg.conf.d/10-amdgpu.conf
Section "OutputClass"
Identifier "AMDgpu"
MatchDriver "amdgpu"
Driver "amdgpu"
Is this usr/share-xorg.conf.d just an overlay of settings, and the basic, core conf is elsewhere? Should I possible creatre a 20-intel.conf as suggest here.
Or is the problem somewhere else entirely? I am totally cluessless on these matters.
