Black Screen after boot.

[Abhiroj]

Ubuntu 16.04 was working fine for a long time but since recently, while booting, after purple screen the screen goes blank. There is no mouse pointer. A cursor blinks for a few seconds and screen goes 100% black but still lit, and then after another few seconds, it goes completely dark as if it is turned off. I then switch to the command-line screen or tty1 to get the logs.

I've tried: the `oibaf-drivers` but this didn't help.

Using `startX` in tty1, the mouse pointer turns to a cross and only folders present on my desktop are visible, but no wallpaper can be seen, no side-dock, no launcher (after the click) and no status bar. The desktop is completely absent though desktop folders are visible and can be opened.

WORKAROUND: Use kernel parameter:
nomodeset

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.8.0-54.57~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-54-generic x86_64
.tmp.unity_support_test.1:

ApportVersion: 2.20.1-0ubuntu2.6
Architecture: amd64
BootLog: /dev/sda11: clean, 302776/3129344 files, 2203296/12499968 blocks
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sat Jun 10 01:39:53 2017
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:380c]
   Subsystem: Lenovo Sun LE [Radeon HD 8550M / R5 M230] [17aa:380c]
InstallationDate: Installed on 2017-05-18 (21 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: LENOVO ACLU12
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-54-generic root=UUID=f693a857-8102-4f79-a16a-ad0d75fb8edc ro quiet splash nomodeset vt.handoff=7
Renderer: Software
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/02/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: 9ACN25WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: VIUU4
dmi.board.vendor: LENOVO
dmi.board.version: 31900006STD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: INVALID
dmi.modalias: dmi:bvnLENOVO:bvr9ACN25WW:bd04/02/2014:svnLENOVO:pnACLU12:pvrINVALID:rvnLENOVO:rnVIUU4:rvr31900006STD:cvnLENOVO:ct10:cvrINVALID:
dmi.product.name: ACLU12
dmi.product.version: INVALID
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.81+git1706061830.b6f450~gd~x
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2~git1706091930.d42fc6~gd~x
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2~git1706091930.d42fc6~gd~x
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.9.99+git1705240733.d80d01~gd~x
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git1706071933.6babcf~gd~x
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15+git1704220733.a7c190~gd~x
xserver.bootTime: Sat Jun 10 01:35:56 2017
xserver.configfile: default
xserver.errors:
 open /dev/dri/card0: No such file or directory
 open /dev/dri/card0: No such file or directory
 Screen 0 deleted because of no matching config section.
 AIGLX: reverting to software rendering
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.18.4-0ubuntu0.2

[penalvch (penalvch)]

Abhiroj, thank you for reporting this and helping make Ubuntu better.

1) Could you please provide the full computer model as noted on the sticker of the computer itself (not from the Bug Description, or the result of a terminal command)?

2) Did this happen after an update? if so, which specifically?

3) To see if this is resolved in your release, could you please update your HWE stack via https://wiki.ubuntu.com/Kernel/LTSEnablementStack and advise to the results?

4) If still reproducible after performing 3), please undo your WORKAROUND, remove and PPAs installed, and provide the missing information from https://wiki.ubuntu.com/DebuggingKernelBoot .

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]