問題なく投稿して grub メニューを表示した後、モニターに「信号なし」と表示されます。私は「nomodeset」トリックを実行し、この投稿もその方法で入力していますが、これが恒久的な「解決策」になることは望んでいません。14.04.5 (何らかの理由で ubuntu.com で見つけることができた唯一の 14.04 ISO) にダウングレードしてみましたが、同じ問題が発生しました。必要に応じて切り替えられるように、14.04.5 と 16.04.1 をデュアル ブートすることにしました (ホーム フォルダーに同じパーティションを使用しています)。
14.04では、満たされていない依存関係（これのようなもの）のためにfglrxドライバをインストールできませんでした。ここ）。16.04 に戻し、radeon および amdgpu ドライバーを試しましたが、うまくいきませんでした。
奇妙なことに、HDMI テレビを VGA ケーブルとともに MOBO に接続すると、両方とも正常に動作します (16.04 では、14.04 ではテストできませんでした)。先週、HDMI モニターを手放したときにこの問題に気付きました。
私はAMD A8-7600、ディスクリート GPU なし。 簡潔にするために、ここに私の部品リスト全体を示します。。
これが私のcat /var/log/Xorg.0.log
[ 12.844]
X.Org X Server 1.18.3
Release Date: 2016-04-04
[ 12.844] X Protocol Version 11, Revision 0
[ 12.844] Build Operating System: Linux 3.13.0-92-generic x86_64 Ubuntu
[ 12.844] Current Operating System: Linux phoenix 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64
[ 12.845] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic root=UUID=20d1a670-d7b6-4897-8027-0ec9c633b0ab ro nomodeset vga=792
[ 12.845] Build Date: 22 July 2016 07:50:34AM
[ 12.845] xorg-server 2:1.18.3-1ubuntu2.3 (For technical support please see http://www.ubuntu.com/support)
[ 12.845] Current version of pixman: 0.33.6
[ 12.845] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 12.845] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 12.845] (==) Log file: "/var/log/Xorg.0.log", Time: Mon Sep 12 13:02:15 2016
[ 12.907] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 12.907] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 12.930] (==) No Layout section. Using the first Screen section.
[ 12.930] (==) No screen section available. Using defaults.
[ 12.930] (**) |-->Screen "Default Screen Section" (0)
[ 12.930] (**) | |-->Monitor "<default monitor>"
[ 12.931] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 12.931] (==) Automatically adding devices
[ 12.931] (==) Automatically enabling devices
[ 12.931] (==) Automatically adding GPU devices
[ 12.931] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 12.931] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 12.931] Entry deleted from font path.
[ 12.931] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 12.931] Entry deleted from font path.
[ 12.931] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 12.932] Entry deleted from font path.
[ 12.932] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 12.932] Entry deleted from font path.
[ 12.932] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 12.932] Entry deleted from font path.
[ 12.932] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
built-ins
[ 12.932] (==) ModulePath set to "/usr/lib/x86_64-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[ 12.932] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 12.932] (II) Loader magic: 0x562635159da0
[ 12.932] (II) Module ABI versions:
[ 12.932] X.Org ANSI C Emulation: 0.4
[ 12.932] X.Org Video Driver: 20.0
[ 12.932] X.Org XInput driver : 22.1
[ 12.932] X.Org Server Extension : 9.0
[ 12.932] (++) using VT number 7
[ 12.932] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[ 12.933] (--) PCI:*(0:0:1:0) 1002:1313:1458:d000 rev 0, Mem @ 0xc0000000/268435456, 0xd0000000/8388608, 0xfeb00000/262144, I/O @ 0x0000f000/256, BIOS @ 0x????????/131072
[ 12.934] (II) LoadModule: "glx"
[ 12.939] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 13.070] (II) Module glx: vendor="X.Org Foundation"
[ 13.070] compiled for 1.18.3, module version = 1.0.0
[ 13.070] ABI class: X.Org Server Extension, version 9.0
[ 13.070] (==) AIGLX enabled
[ 13.070] (==) Matched ati as autoconfigured driver 0
[ 13.070] (==) Matched modesetting as autoconfigured driver 1
[ 13.070] (==) Matched fbdev as autoconfigured driver 2
[ 13.070] (==) Matched vesa as autoconfigured driver 3
[ 13.070] (==) Assigned the driver to the xf86ConfigLayout
[ 13.070] (II) LoadModule: "ati"
[ 13.070] (WW) Warning, couldn't open module ati
[ 13.070] (II) UnloadModule: "ati"
[ 13.070] (II) Unloading ati
[ 13.070] (EE) Failed to load module "ati" (module does not exist, 0)
[ 13.070] (II) LoadModule: "modesetting"
[ 13.070] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 13.070] (II) Module modesetting: vendor="X.Org Foundation"
[ 13.070] compiled for 1.18.3, module version = 1.18.3
[ 13.070] Module class: X.Org Video Driver
[ 13.070] ABI class: X.Org Video Driver, version 20.0
[ 13.071] (II) LoadModule: "fbdev"
[ 13.071] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[ 13.071] (II) Module fbdev: vendor="X.Org Foundation"
[ 13.071] compiled for 1.18.1, module version = 0.4.4
[ 13.071] Module class: X.Org Video Driver
[ 13.071] ABI class: X.Org Video Driver, version 20.0
[ 13.071] (II) LoadModule: "vesa"
[ 13.071] (WW) Warning, couldn't open module vesa
[ 13.071] (II) UnloadModule: "vesa"
[ 13.071] (II) Unloading vesa
[ 13.071] (EE) Failed to load module "vesa" (module does not exist, 0)
[ 13.071] (==) Matched ati as autoconfigured driver 0
[ 13.071] (==) Matched modesetting as autoconfigured driver 1
[ 13.071] (==) Matched fbdev as autoconfigured driver 2
[ 13.071] (==) Matched vesa as autoconfigured driver 3
[ 13.071] (==) Assigned the driver to the xf86ConfigLayout
[ 13.071] (II) LoadModule: "ati"
[ 13.071] (WW) Warning, couldn't open module ati
[ 13.071] (II) UnloadModule: "ati"
[ 13.071] (II) Unloading ati
[ 13.071] (EE) Failed to load module "ati" (module does not exist, 0)
[ 13.071] (II) LoadModule: "modesetting"
[ 13.071] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[ 13.071] (II) Module modesetting: vendor="X.Org Foundation"
[ 13.071] compiled for 1.18.3, module version = 1.18.3
[ 13.071] Module class: X.Org Video Driver
[ 13.071] ABI class: X.Org Video Driver, version 20.0
[ 13.071] (II) UnloadModule: "modesetting"
[ 13.071] (II) Unloading modesetting
[ 13.071] (II) Failed to load module "modesetting" (already loaded, 0)
[ 13.071] (II) LoadModule: "fbdev"
[ 13.071] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[ 13.071] (II) Module fbdev: vendor="X.Org Foundation"
[ 13.071] compiled for 1.18.1, module version = 0.4.4
[ 13.071] Module class: X.Org Video Driver
[ 13.071] ABI class: X.Org Video Driver, version 20.0
[ 13.071] (II) UnloadModule: "fbdev"
[ 13.071] (II) Unloading fbdev
[ 13.071] (II) Failed to load module "fbdev" (already loaded, 0)
[ 13.071] (II) LoadModule: "vesa"
[ 13.071] (WW) Warning, couldn't open module vesa
[ 13.071] (II) UnloadModule: "vesa"
[ 13.071] (II) Unloading vesa
[ 13.071] (EE) Failed to load module "vesa" (module does not exist, 0)
[ 13.071] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 13.071] (II) FBDEV: driver for framebuffer: fbdev
[ 13.079] (EE) open /dev/dri/card0: No such file or directory
[ 13.079] (EE) open /dev/dri/card0: No such file or directory
[ 13.079] (WW) Falling back to old probe method for modesetting
[ 13.079] (EE) open /dev/dri/card0: No such file or directory
[ 13.079] (EE) open /dev/dri/card0: No such file or directory
[ 13.079] (II) Loading sub module "fbdevhw"
[ 13.079] (II) LoadModule: "fbdevhw"
[ 13.079] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 13.080] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 13.080] compiled for 1.18.3, module version = 0.0.2
[ 13.080] ABI class: X.Org Video Driver, version 20.0
[ 13.080] (**) FBDEV(2): claimed PCI slot 0@0:1:0
[ 13.080] (II) FBDEV(2): using default device
[ 13.080] (EE) Screen 0 deleted because of no matching config section.
[ 13.080] (II) UnloadModule: "modesetting"
[ 13.080] (EE) Screen 0 deleted because of no matching config section.
[ 13.080] (II) UnloadModule: "modesetting"
[ 13.080] (II) FBDEV(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
[ 13.080] (==) FBDEV(0): Depth 24, (==) framebuffer bpp 32
[ 13.080] (==) FBDEV(0): RGB weight 888
[ 13.080] (==) FBDEV(0): Default visual is TrueColor
[ 13.080] (==) FBDEV(0): Using gamma correction (1.0, 1.0, 1.0)
[ 13.080] (II) FBDEV(0): hardware: VESA VGA (video memory: 3072kB)
[ 13.080] (II) FBDEV(0): checking modes against framebuffer device...
[ 13.080] (II) FBDEV(0): checking modes against monitor...
[ 13.080] (--) FBDEV(0): Virtual size is 1024x768 (pitch 1024)
[ 13.080] (**) FBDEV(0): Built-in mode "current": 78.7 MHz, 59.9 kHz, 75.7 Hz
[ 13.080] (II) FBDEV(0): Modeline "current"x0.0 78.65 1024 1056 1184 1312 768 772 776 792 -hsync -vsync -csync (59.9 kHz b)
[ 13.080] (==) FBDEV(0): DPI set to (96, 96)
[ 13.080] (II) Loading sub module "fb"
[ 13.080] (II) LoadModule: "fb"
[ 13.080] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 13.086] (II) Module fb: vendor="X.Org Foundation"
[ 13.086] compiled for 1.18.3, module version = 1.0.0
[ 13.086] ABI class: X.Org ANSI C Emulation, version 0.4
[ 13.086] (**) FBDEV(0): using shadow framebuffer
[ 13.086] (II) Loading sub module "shadow"
[ 13.086] (II) LoadModule: "shadow"
[ 13.087] (II) Loading /usr/lib/xorg/modules/libshadow.so
[ 13.087] (II) Module shadow: vendor="X.Org Foundation"
[ 13.087] compiled for 1.18.3, module version = 1.1.0
[ 13.087] ABI class: X.Org ANSI C Emulation, version 0.4
[ 13.087] (==) Depth 24 pixmap format is 32 bpp
[ 13.087] (II) FBDEV(0): FBIOBLANK: Invalid argument (Screen blanking not supported by kernel - disabling)
[ 13.108] (==) FBDEV(0): Backing store enabled
[ 13.116] (==) FBDEV(0): DPMS enabled
[ 13.116] (==) RandR enabled
[ 13.120] (II) SELinux: Disabled on system
[ 13.121] (II) AIGLX: Screen 0 is not DRI2 capable
[ 13.121] (EE) AIGLX: reverting to software rendering
[ 13.515] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[ 13.516] (II) AIGLX: Loaded and initialized swrast
[ 13.516] (II) GLX: Initialized DRISWRAST GL provider for screen 0
[ 13.612] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[ 13.612] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 13.612] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 13.612] (II) LoadModule: "evdev"
[ 13.612] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 13.628] (II) Module evdev: vendor="X.Org Foundation"
[ 13.628] compiled for 1.18.1, module version = 2.10.1
[ 13.628] Module class: X.Org XInput Driver
[ 13.628] ABI class: X.Org XInput driver, version 22.1
[ 13.628] (II) Using input driver 'evdev' for 'Power Button'
[ 13.628] (**) Power Button: always reports core events
[ 13.628] (**) evdev: Power Button: Device: "/dev/input/event1"
[ 13.628] (--) evdev: Power Button: Vendor 0 Product 0x1
[ 13.628] (--) evdev: Power Button: Found keys
[ 13.628] (II) evdev: Power Button: Configuring as keyboard
[ 13.628] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1/event1"
[ 13.628] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[ 13.628] (**) Option "xkb_rules" "evdev"
[ 13.628] (**) Option "xkb_model" "pc105"
[ 13.628] (**) Option "xkb_layout" "us"
[ 13.629] (II) config/udev: Adding input device Video Bus (/dev/input/event2)
[ 13.629] (**) Video Bus: Applying InputClass "evdev keyboard catchall"
[ 13.629] (**) Video Bus: Applying InputClass "evdev keyboard catchall"
[ 13.629] (II) Using input driver 'evdev' for 'Video Bus'
[ 13.629] (**) Video Bus: always reports core events
[ 13.629] (**) evdev: Video Bus: Device: "/dev/input/event2"
[ 13.629] (--) evdev: Video Bus: Vendor 0 Product 0x6
[ 13.629] (--) evdev: Video Bus: Found keys
[ 13.629] (II) evdev: Video Bus: Configuring as keyboard
[ 13.629] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/LNXVIDEO:00/input/input4/event2"
[ 13.629] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
[ 13.629] (**) Option "xkb_rules" "evdev"
[ 13.629] (**) Option "xkb_model" "pc105"
[ 13.629] (**) Option "xkb_layout" "us"
[ 13.629] (II) config/udev: Adding input device Power Button (/dev/input/event0)
[ 13.629] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 13.629] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 13.629] (II) Using input driver 'evdev' for 'Power Button'
[ 13.629] (**) Power Button: always reports core events
[ 13.629] (**) evdev: Power Button: Device: "/dev/input/event0"
[ 13.629] (--) evdev: Power Button: Vendor 0 Product 0x1
[ 13.629] (--) evdev: Power Button: Found keys
[ 13.629] (II) evdev: Power Button: Configuring as keyboard
[ 13.629] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0/event0"
[ 13.629] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 8)
[ 13.629] (**) Option "xkb_rules" "evdev"
[ 13.630] (**) Option "xkb_model" "pc105"
[ 13.630] (**) Option "xkb_layout" "us"
[ 13.630] (II) config/udev: Adding input device HDA ATI HDMI HDMI/DP,pcm=3 (/dev/input/event6)
[ 13.630] (II) No input driver specified, ignoring this device.
[ 13.630] (II) This device may have been added with another device file.
[ 13.630] (II) config/udev: Adding input device Logitech USB Optical Mouse (/dev/input/event4)
[ 13.630] (**) Logitech USB Optical Mouse: Applying InputClass "evdev pointer catchall"
[ 13.630] (**) Logitech USB Optical Mouse: Applying InputClass "evdev pointer catchall"
[ 13.630] (II) Using input driver 'evdev' for 'Logitech USB Optical Mouse'
[ 13.630] (**) Logitech USB Optical Mouse: always reports core events
[ 13.630] (**) evdev: Logitech USB Optical Mouse: Device: "/dev/input/event4"
[ 13.630] (--) evdev: Logitech USB Optical Mouse: Vendor 0x46d Product 0xc05a
[ 13.630] (--) evdev: Logitech USB Optical Mouse: Found 3 mouse buttons
[ 13.630] (--) evdev: Logitech USB Optical Mouse: Found scroll wheel(s)
[ 13.630] (--) evdev: Logitech USB Optical Mouse: Found relative axes
[ 13.630] (--) evdev: Logitech USB Optical Mouse: Found x and y relative axes
[ 13.630] (II) evdev: Logitech USB Optical Mouse: Configuring as mouse
[ 13.630] (II) evdev: Logitech USB Optical Mouse: Adding scrollwheel support
[ 13.630] (**) evdev: Logitech USB Optical Mouse: YAxisMapping: buttons 4 and 5
[ 13.630] (**) evdev: Logitech USB Optical Mouse: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 13.630] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:10.0/usb6/6-1/6-1:1.0/0003:046D:C05A.0002/input/input7/event4"
[ 13.630] (II) XINPUT: Adding extended input device "Logitech USB Optical Mouse" (type: MOUSE, id 9)
[ 13.631] (II) evdev: Logitech USB Optical Mouse: initialized for relative axes.
[ 13.631] (**) Logitech USB Optical Mouse: (accel) keeping acceleration scheme 1
[ 13.631] (**) Logitech USB Optical Mouse: (accel) acceleration profile 0
[ 13.631] (**) Logitech USB Optical Mouse: (accel) acceleration factor: 2.000
[ 13.631] (**) Logitech USB Optical Mouse: (accel) acceleration threshold: 4
[ 13.631] (II) config/udev: Adding input device Logitech USB Optical Mouse (/dev/input/mouse0)
[ 13.631] (II) No input driver specified, ignoring this device.
[ 13.631] (II) This device may have been added with another device file.
[ 13.631] (II) config/udev: Adding input device Dell Dell USB Keyboard (/dev/input/event5)
[ 13.631] (**) Dell Dell USB Keyboard: Applying InputClass "evdev keyboard catchall"
[ 13.631] (**) Dell Dell USB Keyboard: Applying InputClass "evdev keyboard catchall"
[ 13.631] (II) Using input driver 'evdev' for 'Dell Dell USB Keyboard'
[ 13.631] (**) Dell Dell USB Keyboard: always reports core events
[ 13.631] (**) evdev: Dell Dell USB Keyboard: Device: "/dev/input/event5"
[ 13.631] (--) evdev: Dell Dell USB Keyboard: Vendor 0x413c Product 0x2105
[ 13.631] (--) evdev: Dell Dell USB Keyboard: Found keys
[ 13.631] (II) evdev: Dell Dell USB Keyboard: Configuring as keyboard
[ 13.632] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:10.0/usb6/6-2/6-2:1.0/0003:413C:2105.0003/input/input8/event5"
[ 13.632] (II) XINPUT: Adding extended input device "Dell Dell USB Keyboard" (type: KEYBOARD, id 10)
[ 13.632] (**) Option "xkb_rules" "evdev"
[ 13.632] (**) Option "xkb_model" "pc105"
[ 13.632] (**) Option "xkb_layout" "us"
[ 13.632] (II) config/udev: Adding input device USB AUDIO (/dev/input/event3)
[ 13.632] (**) USB AUDIO : Applying InputClass "evdev keyboard catchall"
[ 13.632] (**) USB AUDIO : Applying InputClass "evdev keyboard catchall"
[ 13.632] (II) Using input driver 'evdev' for 'USB AUDIO '
[ 13.632] (**) USB AUDIO : always reports core events
[ 13.632] (**) evdev: USB AUDIO : Device: "/dev/input/event3"
[ 13.632] (--) evdev: USB AUDIO : Vendor 0x1130 Product 0x1620
[ 13.632] (--) evdev: USB AUDIO : Found keys
[ 13.632] (II) evdev: USB AUDIO : Configuring as keyboard
[ 13.632] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:13.0/usb4/4-3/4-3:1.2/0003:1130:1620.0001/input/input6/event3"
[ 13.632] (II) XINPUT: Adding extended input device "USB AUDIO " (type: KEYBOARD, id 11)
[ 13.632] (**) Option "xkb_rules" "evdev"
[ 13.632] (**) Option "xkb_model" "pc105"
[ 13.632] (**) Option "xkb_layout" "us"
[ 13.633] (II) config/udev: Adding input device HD-Audio Generic Front Mic (/dev/input/event7)
[ 13.633] (II) No input driver specified, ignoring this device.
[ 13.633] (II) This device may have been added with another device file.
[ 13.633] (II) config/udev: Adding input device HD-Audio Generic Rear Mic (/dev/input/event8)
[ 13.633] (II) No input driver specified, ignoring this device.
[ 13.633] (II) This device may have been added with another device file.
[ 13.633] (II) config/udev: Adding input device HD-Audio Generic Line (/dev/input/event9)
[ 13.633] (II) No input driver specified, ignoring this device.
[ 13.633] (II) This device may have been added with another device file.
[ 13.633] (II) config/udev: Adding input device HD-Audio Generic Line Out (/dev/input/event10)
[ 13.633] (II) No input driver specified, ignoring this device.
[ 13.633] (II) This device may have been added with another device file.
[ 13.634] (II) config/udev: Adding input device HD-Audio Generic Front Headphone (/dev/input/event11)
[ 13.634] (II) No input driver specified, ignoring this device.
[ 13.634] (II) This device may have been added with another device file.
モニターを検出しているようです。よく分かりません。この問題が何なのかわからず、完全に行き詰まったので最後の手段としてここで質問したいと思いました。だからここにいます。誰でも助けて？
答え1
14.04.5には16.04からHWEがバックポートされているためインストールできませんfglrx（詳細はUbuntu ウィキ）。14.04.4でも大丈夫です。fglrxここからインストールできます。ダウンロードできます。Ubuntu 旧リリース（下にスクロールしてubuntu-14.04.4-desktop-amd64.isoください）。また、HWE EOLメッセージを無効にする(繰り返しますが、セキュリティ アップデートも受信されないことに注意してください)。
答え2
先週リリースされた新しい Ubuntu 16.04.2 LTS はもうお試しになりましたか? これは HWE バージョン (Hardware Enablement Stack) なので、新しいカーネルとグラフィック ドライバー (X-Server、Mesa など) が付属しています。これにより、グラフィック カードなど、特定の範囲のハードウェアの問題が解決されることがあります。
また、VGA ケーブルについて言及されていますが、モニターをコンピューターに接続するために別のケーブルを試しましたか? たとえば、最近、アナログ VGA ケーブルを使用して LCD モニターを AMD A6 CPU (ディスクリート GPU なし) を搭載したコンピューターに接続しましたが、画面が真っ黒になりました。あなたの場合と同様に、nomodeset パラメーターのみが機能しましたが、Linux のグラフィックス ドライバーはハードウェア アクセラレーションと高解像度を無効にします。
次に、VGA ケーブルを DVI ケーブルに交換しました。これにより、VGA ケーブルとは異なり、グラフィック カードとモニターがハードウェア情報を交換できるようになり、箱から出してすぐにすべて正常に動作しました。もちろん、モニターとコンピューターに HDMI ジャックがある場合は、HDMI ケーブルでも問題なく動作するはずです。
追伸既存の 16.04.0 または 16.04.1 インストール (HWE なし) を 16.04.2 HWE に更新するには、1 つの「apt install コマンド」のみが必要です。https://wiki.ubuntu.com/Kernel/LTSEnablementStack より