A few fixes have landed that look like the abort you're hitting : https://gitlab.freedesktop.org/xorg/xserver/commit/8dd7173eeba08f1ecfb414915625c609ad4b3297 https://gitlab.freedesktop.org/xorg/xserver/commit/cffac815b957fd1296d61cc5c20ba3709a77ee4e https://gitlab.freedesktop.org/xorg/xserver/commit/1b0db2c74258d20e3f99bd69c2914fd445abe920 All available in 1.20.2.