Após postar bem e me mostrar o menu do grub, meu monitor mostra "Sem sinal". Eu fiz o truque "nomodeset", e é assim que estou digitando este post, mas não quero que isso se torne uma "solução" permanente. Eu tentei rebaixar para 14.04.5 (o único ISO 14.04 que encontrei no ubuntu.com por algum motivo), e acabei com o mesmo problema. Eu decidi que eu dual boot 14.04.5 e 16.04.1 só assim eu posso alternar para frente e para trás se eu precisar (eles estão usando a mesma partição para a pasta pessoal).
Quando em 14.04 eu não pude instalar os drivers fglrx por causa de dependências não atendidas (como essa aqui ). Voltei para 16.04 e experimentei os drivers radeon e amdgpu, sem sorte.
Uma coisa estranha é que, se eu conecto minha TV HDMI ao MOBO, junto com o cabo VGA, ambos funcionam bem (no 16.04, não consegui testar isso em 14.04). Eu notei este problema na semana passada quando desisti do meu monitor HDMI.
Estou usando um AMD A8-7600 , sem GPU separado. Aqui está toda a minha lista de peças por questões de brevidade .
Aqui está o meu 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.
Isso parece mostrar que está detectando o monitor. Não tenho certeza. Não consegui descobrir qual é o problema, e queria apenas perguntar aqui como último recurso, quando me vi completamente perplexo. Então aqui estou. Alguém pode me ajudar?
Você não pode instalar fglrx em 14.04.5 porque ele tem backport de HWE a partir de 16.04 (mais informações em Ubuntu Wiki ). 14.04.4 está bem, fglrx pode ser instalado lá. Você pode baixá-lo de lançamentos antigos do Ubuntu (role para baixo para ubuntu-14.04.4-desktop-amd64.iso ). Além disso, você pode desativar as mensagens HWE EOL (novamente, lembre-se de que você não receberá atualizações de segurança também). p>
Já experimentou o mais recente Ubuntu 16.04.2 LTS da semana passada? Como é uma versão HWE, também conhecida como Hardware Enablement Stack, ela vem com novos drivers de kernel e gráficos (X-Server, Mesa, etc.). Isso às vezes resolve problemas com um certo intervalo de hardware, como placas gráficas.
Além disso, desde que você mencionou um cabo VGA: já tentou outro cabo para conectar seu monitor ao seu computador? Por exemplo, recentemente usei um cabo VGA analógico para conectar meu monitor LCD a um computador com CPU AMD A6 (também sem GPU discreta) e ele traria apenas uma tela preta. Como no seu caso, apenas o parâmetro nomodeset funcionou, mas o driver gráfico do Linux desabilita a aceleração de hardware e resoluções mais altas.
Depois, substituí o cabo VGA por um cabo DVI, que permite que a placa gráfica e o monitor troquem informações de hardware, em contraste com um cabo VGA, e tudo funcionou bem logo de cara. É claro que também um cabo HDMI deve funcionar bem, caso seu monitor e seu computador tenham essa tomada.
PS Para atualizar uma instalação 16.04.0 ou 16.04.1 existente (sem HWE) para 16.04.2 HWE, apenas um "comando de instalação do apt" é necessário: link