我的GPU是GTX870M。我全新安装了 Ubuntu 18.04。我所做的只是：
sudo apt-get update
sudo apt-get upgrade
sudo ubuntu-drivers autoinstall
nvidia-xconfig
reboot
它安装了 nvidia-390 驱动程序。现在每当我尝试启动 X 服务器时都会startx失败。我仍然可以使用 Wayland。这是我尝试过的（在恢复模式下）：
startx
输出：
X.Org X Server 1.20.1
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-140-generic x86_64 Ubuntu
Current Operating System: Linux <censored>-PC 4.18.0-22-generic #23~18.04.1-Ubuntu SMP Thu Jun 6 08:37:25 UTC 2019 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.18.0-22-generic root=UUID=0d1d9304-4cd6-41f6-80b2-3562578a252e ro recovery nomodeset
Build Date: 27 November 2018 05:27:12PM
xorg-server-hwe-18.04 2:1.20.1-3ubuntu2.1~18.04.1 (For technical support please see http://www.ubuntu.com/support)
Current version …