same thing its been happening to me for at least 3 weeks
[ 281.810] (EE) NVIDIA(0): Failed to initialize the GLX module; please check in your X
[ 281.810] (EE) NVIDIA(0): log file that the GLX module has been loaded in your X
[ 281.810] (EE) NVIDIA(0): server, and that the module is the NVIDIA GLX module. If
[ 281.810] (EE) NVIDIA(0): you continue to encounter problems, Please try
[ 281.810] (EE) NVIDIA(0): reinstalling the NVIDIA driver.
[ 282.222] (EE) AIGLX: reverting to software rendering
I wonder if its related. System still works. The screen is lit but black