xorg-serverを更新したらクラッシュしまくりで焦った…
nvidia-driverを更新し忘れてただけだった

[ 3558.139] (**) NVIDIA(0): Enabling 2D acceleration
[ 3558.139] (EE) NVIDIA(0): Failed to initialize the GLX module; please check in your X
[ 3558.139] (EE) NVIDIA(0): log file that the GLX module has been loaded in your X
[ 3558.139] (EE) NVIDIA(0): server, and that the module is the NVIDIA GLX module. If
[ 3558.139] (EE) NVIDIA(0): you continue to encounter problems, Please try
[ 3558.139] (EE) NVIDIA(0): reinstalling the NVIDIA driver.