dmesg
cd /var/log
cat boot.log
cat dpkg.log
cat kern.log
cat syslog
最终发现是我更新了liunx kernel,但是新kernel没有Nvidia driver
May 19 09:39:07 www gnome-session[6009]: modprobe: FATAL: Module nvidia not found in directory /lib/modules/4.15.0-50-generic
May 19 09:39:07 www gnome-session-c[6265]: eglGetDisplay() failed
解决办法
- 卸载新kernel,自动降级使用old kernel
sudo dpkg --get-selections |grep linux-image\n
uname -r
sudo apt-get remove linux-image-4.15.0-50-generic
lsmod
depmod
modprobe
- build nvidia driver into new kernel