CentOS 7.2 "X-Server" / bin / X "kann nicht ausgeführt werden"

Ich habe einen WACOM-Treiber zurückgesetzt und Nvidia-Treiber neu installiert. Jetzt kann ich kdmnicht mehr starten.

> systemctl status kdm kdm[3954]: plymouth is running kdm[3954]: plymouth is active on VT 1, reusing for :0 kdm[3954]: plymouth should quit after server startup kdm[3967]: X server "/bin/X" cannot be executed kdm[3954]: X server for display :0 cannot be started, session disabled kdm[3954]: Quitting Plymouth without transition kdm[3954]: plymouth is NOT running 

Überprüfung nvidia-smi:

> nvidia-smi  +-----------------------------------------------------------------------------+ | NVIDIA-SMI 390.25 Driver Version: 390.25 | |-------------------------------+----------------------+----------------------+ | GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC | | Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. | |===============================+======================+======================| | 0 TITAN Xp COLLEC... Off | 00000000:17:00.0 Off | N/A | | 23% 38C P0 61W / 250W | 0MiB / 12196MiB | 0% Default | +-------------------------------+----------------------+----------------------+ | 1 TITAN Xp Off | 00000000:65:00.0 Off | N/A | | 26% 45C P0 60W / 250W | 0MiB / 12192MiB | 0% Default | +-------------------------------+----------------------+----------------------+  +-----------------------------------------------------------------------------+ | Processes: GPU Memory | | GPU PID Type Process name Usage | |=============================================================================| | No running processes found | +-----------------------------------------------------------------------------+ 

Auschecken grub

> cat /etc/default/grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="powernow-k8.disable=1 intel_pstate=disable selinux=0 crashkernel=auto rd.lvm.lv=centos_vxfhost/root rd.lvm.lv=centos_vxfhost/swap nomodeset net.ifnames=0 rhgb quiet" GRUB_DISABLE_RECOVERY="true" 

Was ist der beste Weg, um dies zu diagnostizieren und wieder ins Rollen zu bringen?