Ubuntu 17.04 更新后无法正常启动。我尝试了几个运行级别。
我无法以图形模式进入运行级别 5 和 3。lightdm 从未启动！
dmesg启动后出现错误：
[ 0.144583] ACPI Error: [_PPC] Namespace lookup failure, AE_ALREADY_EXISTS (20160930/dswload-378)
[ 0.160586] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM
[ 12.455982] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro
[ 13.807652] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-26.ucode failed with error -2
[ 13.813076] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-25.ucode failed with error -2
[ 13.813094] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-24.ucode failed with error -2
[ 13.832814] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-23.ucode failed with error -2
结果错误journalctl -xb：
مه 20 09:42:32 hamid-Lenovo-ideapad-110-15ISK kernel: ACPI Error: [_PPC] Namespace lookup failure, AE_ALREADY_EXISTS (20160930/dswload-378)
مه 20 09:42:32 hamid-Lenovo-ideapad-110-15ISK kernel: acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM
مه 20 09:42:35 hamid-Lenovo-ideapad-110-15ISK kernel: iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-26.ucode failed with error -2
مه 20 09:42:35 hamid-Lenovo-ideapad-110-15ISK kernel: iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-25.ucode failed with error -2
مه 20 09:42:35 hamid-Lenovo-ideapad-110-15ISK kernel: iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-24.ucode failed with error -2
مه 20 09:42:35 hamid-Lenovo-ideapad-110-15ISK kernel: iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-7265D-23.ucode failed with error -2
مه 20 09:42:41 hamid-Lenovo-ideapad-110-15ISK systemd-fsck[691]: home contains a file system with errors, check forced.
مه 20 09:42:43 hamid-Lenovo-ideapad-110-15ISK systemd-fsck[691]: fsck failed with error code 4.
我想问的是，如何退出紧急模式并修复操作系统的可用性？