Ubuntu 18.04-アップグレード後-Display / PKCS＃7署名エラー
17.10から18.04にアップグレードした後、ubuntuを開こうとすると、次のエラーが発生します（kern.logにもあります）
Sep 28 15:06:12 aram-UX330UAK kernel: [ 15.056052] PKCS#7 signature not signed with a trusted key
----
Sep 28 15:06:12 aram-UX330UAK kernel: [ 15.083938] PKCS#7 signature not signed with a trusted key
----
Sep 28 15:06:12 aram-UX330UAK kernel: [ 15.087645] PKCS#7 signature not signed with a trusted key
----
Sep 28 15:06:12 aram-UX330UAK kernel: [ 15.093293] PKCS#7 signature not signed with a trusted key
特に、PKCS＃7は一般的な問題であり、何も表示できないようです。私は通常、標準のubuntuデスクトップを使用していません（私はxmonadを使用しています）が、ログイン画面（標準のubuntuデスクトップを使用していると想定しています）にもアクセスできません。
私は私が見た以前のもののいくつかを試しました：
buntu 18.04ブートは、信頼できるキーで署名されていないPKCS＃7署名でハングします
アップグレード後、ubuntu 18.04がGUIからターミナルに変更されました
しかし、私が気づいた問題：私はnvidiaを持っていないので、これがグラフィックスの問題かどうかわかりません：
$ lspci -v | grep VGA -A 1
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. HD Graphics 620
また、ダブルチェックし、すべてがインストールされているようです。アップデート/アップグレードを試みましたが、何も新しいことは起こりませんでした。私は無駄にubuntu-desktopを再インストールしてみました。
私はWindowsをデュアルブートしていますが、セキュアブートを無効にしています（BIOSをダブルおよびトリプルチェックしました）ので、これも問題ではないと思います。
ただし、後でターミナルにアクセスできますが、ログインした後、次のエラーに気付きました。
Failed to connect to X Server.
Cannot open display 'default display'
したがって、表示の問題のように見えますが、どのようにすればよいかわかりません。 xmonadを再インストールしてみましたが、役に立ちませんでした。
誰もがこれを修正する方法や、私が物事にアクセスするために何をする必要があるかについて何かアイデアがありますか？
---編集---
これが私のXorgログです。
[ 12435.612]
X.Org X Server 1.19.6
Release Date: 2017-12-20
[ 12435.612] X Protocol Version 11, Revision 0
[ 12435.612] Build Operating System: Linux 4.4.0-119-generic x86_64 Ubuntu
[ 12435.612] Current Operating System: Linux aram-UX330UAK 4.13.0-46-generic #51-Ubuntu SMP Tue Jun 12 12:36:29 UTC 2018 x86_64
[ 12435.612] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.13.0-46-generic.efi.signed root=UUID=6919df57-2080-4508-82b7-0ccb1e067b6a ro quiet splash vt.handoff=7
[ 12435.613] Build Date: 13 April 2018 08:07:36PM
[ 12435.613] xorg-server 2:1.19.6-1ubuntu4 (For technical support please see http://www.ubuntu.com/support)
[ 12435.613] Current version of pixman: 0.34.0
[ 12435.613] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 12435.613] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 12435.613] (==) Log file: "/var/log/Xorg.0.log", Time: Fri Sep 28 14:44:15 2018
[ 12435.613] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 12435.614] (==) No Layout section. Using the first Screen section.
[ 12435.614] (==) No screen section available. Using defaults.
[ 12435.614] (**) |-->Screen "Default Screen Section" (0)
[ 12435.614] (**) | |-->Monitor "<default monitor>"
[ 12435.614] (==) No device specified for screen "Default Screen Section".
Using the first device section listed.
[ 12435.614] (**) | |-->Device "card0"
[ 12435.614] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 12435.614] (==) Automatically adding devices
[ 12435.614] (==) Automatically enabling devices
[ 12435.614] (==) Automatically adding GPU devices
[ 12435.614] (==) Automatically binding GPU devices
[ 12435.614] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 12435.614] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 12435.614] Entry deleted from font path.
[ 12435.615] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 12435.615] Entry deleted from font path.
[ 12435.615] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 12435.615] Entry deleted from font path.
[ 12435.615] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 12435.615] Entry deleted from font path.
[ 12435.615] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 12435.615] Entry deleted from font path.
[ 12435.615] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
built-ins
[ 12435.615] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 12435.615] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 12435.615] (II) Loader magic: 0x556a504d8020
[ 12435.615] (II) Module ABI versions:
[ 12435.615] X.Org ANSI C Emulation: 0.4
[ 12435.615] X.Org Video Driver: 23.0
[ 12435.615] X.Org XInput driver : 24.1
[ 12435.615] X.Org Server Extension : 10.0
[ 12435.616] (++) using VT number 7
[ 12435.616] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[ 12435.617] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 12435.626] (--) PCI:*(0:0:2:0) 8086:5916:1043:1520 rev 2, Mem @ 0xee000000/16777216, 0xd0000000/268435456, I/O @ 0x0000f000/64, BIOS @ 0x????????/131072
[ 12435.626] (II) LoadModule: "glx"
[ 12435.627] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 12435.628] (II) Module glx: vendor="X.Org Foundation"
[ 12435.628] compiled for 1.19.6, module version = 1.0.0
[ 12435.628] ABI class: X.Org Server Extension, version 10.0
[ 12435.628] (II) LoadModule: "intel"
[ 12435.629] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 12435.629] (II) Module intel: vendor="X.Org Foundation"
[ 12435.629] compiled for 1.19.5, module version = 2.99.917
[ 12435.629] Module class: X.Org Video Driver
[ 12435.629] ABI class: X.Org Video Driver, version 23.0
[ 12435.629] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,
915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,
Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33,
GM45, 4 Series, G45/G43, Q45/Q43, G41, B43
[ 12435.630] (II) intel: Driver for Intel(R) HD Graphics
[ 12435.630] (II) intel: Driver for Intel(R) Iris(TM) Graphics
[ 12435.630] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics
[ 12435.630] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20170619
[ 12435.630] (II) intel(0): SNA compiled: xserver-xorg-video-intel 2:2.99.917+git20171229-1 (Timo Aaltonen <[email protected]>)
[ 12435.630] (II) intel(0): SNA compiled for use with valgrind
[ 12435.649] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics 620
[ 12435.649] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2, avx, avx2; using a maximum of 2 threads
[ 12435.649] (II) intel(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
[ 12435.649] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[ 12435.649] (==) intel(0): RGB weight 888
[ 12435.649] (==) intel(0): Default visual is TrueColor
[ 12435.649] (**) intel(0): Option "Backlight" "intel_backlight"
[ 12435.650] (II) intel(0): Output eDP1 has no monitor section
[ 12435.650] (**) intel(0): Found backlight control interface intel_backlight (type 'raw') for output eDP1
[ 12435.650] (II) intel(0): Enabled output eDP1
[ 12435.650] (II) intel(0): Output HDMI1 has no monitor section
[ 12435.650] (II) intel(0): Enabled output HDMI1
[ 12435.650] (--) intel(0): Using a maximum size of 256x256 for hardware cursors
[ 12435.650] (II) intel(0): Output VIRTUAL1 has no monitor section
[ 12435.650] (II) intel(0): Enabled output VIRTUAL1
[ 12435.650] (--) intel(0): Output eDP1 using initial mode 1920x1080 on pipe 0
[ 12435.651] (==) intel(0): TearFree enabled
[ 12435.651] (==) intel(0): Using gamma correction (1.0, 1.0, 1.0)
[ 12435.651] (==) intel(0): DPI set to (96, 96)
[ 12435.651] (II) Loading sub module "dri3"
[ 12435.651] (II) LoadModule: "dri3"
[ 12435.651] (II) Module "dri3" already built-in
[ 12435.651] (II) Loading sub module "dri2"
[ 12435.651] (II) LoadModule: "dri2"
[ 12435.651] (II) Module "dri2" already built-in
[ 12435.651] (II) Loading sub module "present"
[ 12435.651] (II) LoadModule: "present"
[ 12435.651] (II) Module "present" already built-in
[ 12435.651] (==) Depth 24 pixmap format is 32 bpp
[ 12435.651] (II) intel(0): SNA initialized with Kabylake (gen9) backend
[ 12435.651] (==) intel(0): Backing store enabled
[ 12435.651] (==) intel(0): Silken mouse enabled
[ 12435.651] (II) intel(0): HW Cursor enabled
[ 12435.651] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message.
[ 12435.652] (==) intel(0): DPMS enabled
[ 12435.652] (==) intel(0): Display hotplug detection enabled
[ 12435.652] (II) intel(0): [DRI2] Setup complete
[ 12435.652] (II) intel(0): [DRI2] DRI driver: i965
[ 12435.652] (II) intel(0): [DRI2] VDPAU driver: va_gl
[ 12435.652] (II) intel(0): direct rendering: DRI2 enabled
[ 12435.652] (II) intel(0): hardware support for Present enabled
[ 12435.652] (--) RandR disabled
[ 12435.657] (II) SELinux: Disabled on system
[ 12435.674] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[ 12435.674] (II) AIGLX: enabled GLX_ARB_create_context
[ 12435.674] (II) AIGLX: enabled GLX_ARB_create_context_profile
[ 12435.674] (II) AIGLX: enabled GLX_EXT_create_context_es{,2}_profile
[ 12435.674] (II) AIGLX: enabled GLX_INTEL_swap_event
[ 12435.674] (II) AIGLX: enabled GLX_SGI_swap_control
[ 12435.674] (II) AIGLX: enabled GLX_EXT_framebuffer_sRGB
[ 12435.674] (II) AIGLX: enabled GLX_ARB_fbconfig_float
[ 12435.674] (II) AIGLX: enabled GLX_EXT_fbconfig_packed_float
[ 12435.674] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
[ 12435.674] (II) AIGLX: enabled GLX_ARB_create_context_robustness
[ 12435.675] (II) AIGLX: Loaded and initialized i965
[ 12435.675] (II) GLX: Initialized DRI2 GL provider for screen 0
[ 12435.679] (II) intel(0): switch to mode [email protected] on eDP1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 12435.689] (II) intel(0): Setting screen physical size to 508 x 285
[ 12435.728] (II) config/udev: Adding input device Power Button (/dev/input/event3)
[ 12435.728] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[ 12435.728] (II) LoadModule: "libinput"
[ 12435.729] (II) Loading /usr/lib/xorg/modules/input/libinput_drv.so
[ 12435.731] (II) Module libinput: vendor="X.Org Foundation"
[ 12435.731] compiled for 1.19.6, module version = 0.27.1
[ 12435.731] Module class: X.Org XInput Driver
[ 12435.731] ABI class: X.Org XInput driver, version 24.1
[ 12435.731] (II) Using input driver 'libinput' for 'Power Button'
[ 12435.731] (**) Power Button: always reports core events
[ 12435.731] (**) Option "Device" "/dev/input/event3"
[ 12435.732] (**) Option "_source" "server/udev"
[ 12435.732] (II) event3 - Power Button: is tagged by udev as: Keyboard
[ 12435.732] (II) event3 - Power Button: device is a keyboard
[ 12435.732] (II) event3 - Power Button: device removed
[ 12435.752] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3/event3"
[ 12435.752] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[ 12435.752] (**) Option "xkb_model" "asus_laptop"
[ 12435.752] (**) Option "xkb_layout" "us"
[ 12435.752] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12435.769] (II) event3 - Power Button: is tagged by udev as: Keyboard
[ 12435.769] (II) event3 - Power Button: device is a keyboard
[ 12435.769] (II) config/udev: Adding input device Asus Wireless Radio Control (/dev/input/event6)
[ 12435.769] (**) Asus Wireless Radio Control: Applying InputClass "libinput keyboard catchall"
[ 12435.769] (II) Using input driver 'libinput' for 'Asus Wireless Radio Control'
[ 12435.770] (**) Asus Wireless Radio Control: always reports core events
[ 12435.770] (**) Option "Device" "/dev/input/event6"
[ 12435.770] (**) Option "_source" "server/udev"
[ 12435.770] (II) event6 - Asus Wireless Radio Control: is tagged by udev as: Keyboard
[ 12435.770] (II) event6 - Asus Wireless Radio Control: device is a keyboard
[ 12435.770] (II) event6 - Asus Wireless Radio Control: device removed
[ 12435.824] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/ATK4002:00/input/input6/event6"
[ 12435.824] (II) XINPUT: Adding extended input device "Asus Wireless Radio Control" (type: KEYBOARD, id 7)
[ 12435.824] (**) Option "xkb_model" "asus_laptop"
[ 12435.824] (**) Option "xkb_layout" "us"
[ 12435.824] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12435.824] (II) event6 - Asus Wireless Radio Control: is tagged by udev as: Keyboard
[ 12435.824] (II) event6 - Asus Wireless Radio Control: device is a keyboard
[ 12435.824] (II) config/udev: Adding input device Video Bus (/dev/input/event5)
[ 12435.825] (**) Video Bus: Applying InputClass "libinput keyboard catchall"
[ 12435.825] (II) Using input driver 'libinput' for 'Video Bus'
[ 12435.825] (**) Video Bus: always reports core events
[ 12435.825] (**) Option "Device" "/dev/input/event5"
[ 12435.825] (**) Option "_source" "server/udev"
[ 12435.825] (II) event5 - Video Bus: is tagged by udev as: Keyboard
[ 12435.825] (II) event5 - Video Bus: device is a keyboard
[ 12435.825] (II) event5 - Video Bus: device removed
[ 12435.876] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input5/event5"
[ 12435.876] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 8)
[ 12435.876] (**) Option "xkb_model" "asus_laptop"
[ 12435.876] (**) Option "xkb_layout" "us"
[ 12435.876] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12435.878] (II) event5 - Video Bus: is tagged by udev as: Keyboard
[ 12435.878] (II) event5 - Video Bus: device is a keyboard
[ 12435.879] (II) config/udev: Adding input device Lid Switch (/dev/input/event0)
[ 12435.879] (II) No input driver specified, ignoring this device.
[ 12435.879] (II) This device may have been added with another device file.
[ 12435.881] (II) config/udev: Adding input device Power Button (/dev/input/event2)
[ 12435.881] (**) Power Button: Applying InputClass "libinput keyboard catchall"
[ 12435.881] (II) Using input driver 'libinput' for 'Power Button'
[ 12435.882] (**) Power Button: always reports core events
[ 12435.882] (**) Option "Device" "/dev/input/event2"
[ 12435.882] (**) Option "_source" "server/udev"
[ 12435.883] (II) event2 - Power Button: is tagged by udev as: Keyboard
[ 12435.883] (II) event2 - Power Button: device is a keyboard
[ 12435.883] (II) event2 - Power Button: device removed
[ 12435.916] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input2/event2"
[ 12435.916] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 9)
[ 12435.916] (**) Option "xkb_model" "asus_laptop"
[ 12435.916] (**) Option "xkb_layout" "us"
[ 12435.916] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12435.917] (II) event2 - Power Button: is tagged by udev as: Keyboard
[ 12435.917] (II) event2 - Power Button: device is a keyboard
[ 12435.919] (II) config/udev: Adding input device Sleep Button (/dev/input/event1)
[ 12435.919] (**) Sleep Button: Applying InputClass "libinput keyboard catchall"
[ 12435.919] (II) Using input driver 'libinput' for 'Sleep Button'
[ 12435.919] (**) Sleep Button: always reports core events
[ 12435.919] (**) Option "Device" "/dev/input/event1"
[ 12435.919] (**) Option "_source" "server/udev"
[ 12435.920] (II) event1 - Sleep Button: is tagged by udev as: Keyboard
[ 12435.920] (II) event1 - Sleep Button: device is a keyboard
[ 12435.920] (II) event1 - Sleep Button: device removed
[ 12435.972] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1/event1"
[ 12435.972] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 10)
[ 12435.972] (**) Option "xkb_model" "asus_laptop"
[ 12435.972] (**) Option "xkb_layout" "us"
[ 12435.972] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12435.973] (II) event1 - Sleep Button: is tagged by udev as: Keyboard
[ 12435.973] (II) event1 - Sleep Button: device is a keyboard
[ 12435.975] (II) config/udev: Adding input device USB2.0 HD UVC WebCam: USB2.0 HD (/dev/input/event15)
[ 12435.975] (**) USB2.0 HD UVC WebCam: USB2.0 HD: Applying InputClass "libinput keyboard catchall"
[ 12435.975] (II) Using input driver 'libinput' for 'USB2.0 HD UVC WebCam: USB2.0 HD'
[ 12435.975] (**) USB2.0 HD UVC WebCam: USB2.0 HD: always reports core events
[ 12435.975] (**) Option "Device" "/dev/input/event15"
[ 12435.975] (**) Option "_source" "server/udev"
[ 12435.976] (II) event15 - USB2.0 HD UVC WebCam: USB2.0 HD: is tagged by udev as: Keyboard
[ 12435.976] (II) event15 - USB2.0 HD UVC WebCam: USB2.0 HD: device is a keyboard
[ 12435.976] (II) event15 - USB2.0 HD UVC WebCam: USB2.0 HD: device removed
[ 12436.024] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input16/event15"
[ 12436.024] (II) XINPUT: Adding extended input device "USB2.0 HD UVC WebCam: USB2.0 HD" (type: KEYBOARD, id 11)
[ 12436.024] (**) Option "xkb_model" "asus_laptop"
[ 12436.024] (**) Option "xkb_layout" "us"
[ 12436.024] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12436.025] (II) event15 - USB2.0 HD UVC WebCam: USB2.0 HD: is tagged by udev as: Keyboard
[ 12436.025] (II) event15 - USB2.0 HD UVC WebCam: USB2.0 HD: device is a keyboard
[ 12436.027] (II) config/udev: Adding input device ELAN1300:00 04F3:3028 Touchpad (/dev/input/event8)
[ 12436.027] (**) ELAN1300:00 04F3:3028 Touchpad: Applying InputClass "libinput touchpad catchall"
[ 12436.027] (**) ELAN1300:00 04F3:3028 Touchpad: Applying InputClass "touchpad catchall"
[ 12436.027] (**) ELAN1300:00 04F3:3028 Touchpad: Applying InputClass "Default clickpad buttons"
[ 12436.027] (II) LoadModule: "synaptics"
[ 12436.027] (II) Loading /usr/lib/xorg/modules/input/synaptics_drv.so
[ 12436.027] (II) Module synaptics: vendor="X.Org Foundation"
[ 12436.027] compiled for 1.19.3, module version = 1.9.0
[ 12436.027] Module class: X.Org XInput Driver
[ 12436.027] ABI class: X.Org XInput driver, version 24.1
[ 12436.027] (II) Using input driver 'synaptics' for 'ELAN1300:00 04F3:3028 Touchpad'
[ 12436.027] (**) ELAN1300:00 04F3:3028 Touchpad: always reports core events
[ 12436.027] (**) Option "Device" "/dev/input/event8"
[ 12436.065] (II) synaptics: ELAN1300:00 04F3:3028 Touchpad: found clickpad property
[ 12436.065] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: x-axis range 0 - 3208 (res 31)
[ 12436.065] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: y-axis range 0 - 2206 (res 32)
[ 12436.065] (II) synaptics: ELAN1300:00 04F3:3028 Touchpad: device does not report pressure, will use touch data.
[ 12436.065] (II) synaptics: ELAN1300:00 04F3:3028 Touchpad: device does not report finger width.
[ 12436.065] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: buttons: left double triple
[ 12436.065] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: Vendor 0x4f3 Product 0x3028
[ 12436.065] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: invalid pressure range. defaulting to 0 - 255
[ 12436.065] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: invalid finger width range. defaulting to 0 - 15
[ 12436.065] (**) Option "SoftButtonAreas" "50% 0 82% 0 0 0 0 0"
[ 12436.065] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: touchpad found
[ 12436.065] (**) ELAN1300:00 04F3:3028 Touchpad: always reports core events
[ 12436.096] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-5/i2c-ELAN1300:00/0018:04F3:3028.0001/input/input9/event8"
[ 12436.096] (II) XINPUT: Adding extended input device "ELAN1300:00 04F3:3028 Touchpad" (type: TOUCHPAD, id 12)
[ 12436.096] (**) synaptics: ELAN1300:00 04F3:3028 Touchpad: (accel) MinSpeed is now constant deceleration 2.5
[ 12436.096] (**) synaptics: ELAN1300:00 04F3:3028 Touchpad: (accel) MaxSpeed is now 1.75
[ 12436.096] (**) synaptics: ELAN1300:00 04F3:3028 Touchpad: (accel) AccelFactor is now 0.051
[ 12436.097] (**) ELAN1300:00 04F3:3028 Touchpad: (accel) keeping acceleration scheme 1
[ 12436.097] (**) ELAN1300:00 04F3:3028 Touchpad: (accel) acceleration profile 1
[ 12436.097] (**) ELAN1300:00 04F3:3028 Touchpad: (accel) acceleration factor: 2.000
[ 12436.097] (**) ELAN1300:00 04F3:3028 Touchpad: (accel) acceleration threshold: 4
[ 12436.097] (--) synaptics: ELAN1300:00 04F3:3028 Touchpad: touchpad found
[ 12436.099] (II) config/udev: Adding input device ELAN1300:00 04F3:3028 Touchpad (/dev/input/mouse0)
[ 12436.099] (**) ELAN1300:00 04F3:3028 Touchpad: Ignoring device from InputClass "touchpad ignore duplicates"
[ 12436.099] (II) config/udev: Adding input device HDA Intel PCH Headphone (/dev/input/event9)
[ 12436.100] (II) No input driver specified, ignoring this device.
[ 12436.100] (II) This device may have been added with another device file.
[ 12436.100] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=3 (/dev/input/event10)
[ 12436.100] (II) No input driver specified, ignoring this device.
[ 12436.100] (II) This device may have been added with another device file.
[ 12436.101] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=7 (/dev/input/event11)
[ 12436.101] (II) No input driver specified, ignoring this device.
[ 12436.101] (II) This device may have been added with another device file.
[ 12436.102] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=8 (/dev/input/event12)
[ 12436.102] (II) No input driver specified, ignoring this device.
[ 12436.102] (II) This device may have been added with another device file.
[ 12436.102] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=9 (/dev/input/event13)
[ 12436.102] (II) No input driver specified, ignoring this device.
[ 12436.102] (II) This device may have been added with another device file.
[ 12436.103] (II) config/udev: Adding input device HDA Intel PCH HDMI/DP,pcm=10 (/dev/input/event14)
[ 12436.103] (II) No input driver specified, ignoring this device.
[ 12436.103] (II) This device may have been added with another device file.
[ 12436.104] (II) config/udev: Adding input device Asus WMI hotkeys (/dev/input/event7)
[ 12436.104] (**) Asus WMI hotkeys: Applying InputClass "libinput keyboard catchall"
[ 12436.104] (II) Using input driver 'libinput' for 'Asus WMI hotkeys'
[ 12436.104] (**) Asus WMI hotkeys: always reports core events
[ 12436.104] (**) Option "Device" "/dev/input/event7"
[ 12436.104] (**) Option "_source" "server/udev"
[ 12436.105] (II) event7 - Asus WMI hotkeys: is tagged by udev as: Keyboard
[ 12436.105] (II) event7 - Asus WMI hotkeys: device is a keyboard
[ 12436.105] (II) event7 - Asus WMI hotkeys: device removed
[ 12436.148] (**) Option "config_info" "udev:/sys/devices/platform/asus-nb-wmi/input/input7/event7"
[ 12436.148] (II) XINPUT: Adding extended input device "Asus WMI hotkeys" (type: KEYBOARD, id 13)
[ 12436.148] (**) Option "xkb_model" "asus_laptop"
[ 12436.148] (**) Option "xkb_layout" "us"
[ 12436.148] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12436.149] (II) event7 - Asus WMI hotkeys: is tagged by udev as: Keyboard
[ 12436.149] (II) event7 - Asus WMI hotkeys: device is a keyboard
[ 12436.150] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event4)
[ 12436.150] (**) AT Translated Set 2 keyboard: Applying InputClass "libinput keyboard catchall"
[ 12436.150] (II) Using input driver 'libinput' for 'AT Translated Set 2 keyboard'
[ 12436.150] (**) AT Translated Set 2 keyboard: always reports core events
[ 12436.150] (**) Option "Device" "/dev/input/event4"
[ 12436.150] (**) Option "_source" "server/udev"
[ 12436.151] (II) event4 - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[ 12436.151] (II) event4 - AT Translated Set 2 keyboard: device is a keyboard
[ 12436.151] (II) event4 - AT Translated Set 2 keyboard: device removed
[ 12436.188] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input4/event4"
[ 12436.188] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 14)
[ 12436.188] (**) Option "xkb_model" "asus_laptop"
[ 12436.188] (**) Option "xkb_layout" "us"
[ 12436.188] (**) Option "xkb_options" "lv3:menu_switch,compose:rctrl"
[ 12436.189] (II) event4 - AT Translated Set 2 keyboard: is tagged by udev as: Keyboard
[ 12436.189] (II) event4 - AT Translated Set 2 keyboard: device is a keyboard
[ 12436.223] (II) event3 - Power Button: device removed
[ 12436.268] (II) event6 - Asus Wireless Radio Control: device removed
[ 12436.308] (II) event5 - Video Bus: device removed
[ 12436.348] (II) event2 - Power Button: device removed
[ 12436.388] (II) event1 - Sleep Button: device removed
[ 12436.436] (II) event15 - USB2.0 HD UVC WebCam: USB2.0 HD: device removed
[ 12436.516] (II) event7 - Asus WMI hotkeys: device removed
[ 12436.556] (II) event4 - AT Translated Set 2 keyboard: device removed
[ 12436.588] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 12436.668] (II) UnloadModule: "libinput"
[ 12436.668] (II) UnloadModule: "libinput"
[ 12436.668] (II) UnloadModule: "synaptics"
[ 12436.668] (II) UnloadModule: "libinput"
[ 12436.668] (II) UnloadModule: "libinput"
[ 12436.668] (II) UnloadModule: "libinput"
[ 12436.668] (II) UnloadModule: "libinput"
[ 12436.668] (II) UnloadModule: "libinput"
[ 12436.669] (II) UnloadModule: "libinput"
[ 12436.673] (II) Server terminated successfully (0). Closing log file.
結局、gdm3がロードされなかったことが原因であることがわかりました。私はこれに従いました： gdm3はubuntu 18.04で起動しません そして、2回の再起動後に動作し始めました。