So I scrutinized my Xorg.log file as suggested and found some lines showing
failures:
*[28.568] (EE) Failed to load
/usr/lib64/xorg/modules/extensions/nvidia/libglx.so:
libnvidia-tls.so.390.59: cannot open shared object file: No such file or
directory*
*[28.568] (II) UnloadModule: "glx"*
Announcing the release of the kernel-lt-4.4.135-1.el7.elrepo package
set into the EL7 elrepo-kernel repository:
https://elrepo.org/tiki/kernel-lt
The upstream changelog:
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.135
The following files are currently synchronising to our mirror
Announcing the release of the kernel-lt-4.4.135-1.el6.elrepo package
set into the EL6 elrepo-kernel repository:
https://elrepo.org/tiki/kernel-lt
The upstream changelog:
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.135
The following files are currently synchronising to our mirror
