Switching from Pixman to GL renderer causes
On a AMD system with integrated GPU and Debian Sid/unstable,starting Weston 8.0 (and master) with
--use-pixman and switching to GL mode with Meta + Shift + Space and then w (after a while it works), the screen gets distorted. (Sorry for the flash light.)
Moving the mouse, some elements on the screen are moving.
Switching to another tty and back, the Weston surface is shown correctly.