GLAMOR is enabled on softpipe
When running X with simpledrm
Linux driver (No acceleration, just a framebuffer) it uses modesetting + Glamor.
The system in question has softpipe
OpenGL which is terribly slow compared to "AccelMethod": "none"
. Would be great to detect such scenarios and disable it, because it's not obvious why it's so slow at first sight.
When running wayland compositors such as sway
, everything is smooth out of the box.