Ubuntu 16.04 中正常模式和故障安全模式均未启动。这是我的日志文件：
[ 34.184]
X.Org X Server 1.18.3
Release Date: 2016-04-04
[ 34.187] X Protocol Version 11, Revision 0
[ 34.187] Build Operating System: Linux 3.13.0-92-generic x86_64 Ubuntu
[ 34.188] Current Operating System: Linux Sinha 4.4.0-53-generic #74-Ubuntu SMP Fri Dec 2 15:59:10 UTC 2016 x86_64
[ 34.188] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-53-generic.efi.signed root=UUID=8a6b11de-3582-4e10-b96c-2bdd22a77676 ro recovery nomodeset
[ 34.190] Build Date: 22 July 2016 07:50:34AM
[ 34.191] xorg-server 2:1.18.3-1ubuntu2.3 (For technical support please see http://www.ubuntu.com/support)
[ 34.192] Current version of pixman: …