** Description changed:
- WHAT HAPPENED INSTEAD:
- ======================
- Since upgrading from Ubuntu 11.10 to 12.04, while booting, Plymouth is
displayed fine, there are no problems there. The problem occurs when Plymouth
finishes and Lightdm should start. 9 times out of 10, Lightdm starts fine and
everything works OK.
+ Since updating from 12.04 Beta 1 to 12.04 (Final) (I went from 11.10 to
+ 12.04 Beta 1 before that via a clean install), while booting, GRUB is
+ displayed fine, and Ubuntu begins to boot fine. It's only when Plymouth
+ is displayed (which happens fairly late into boot for me) that I start
+ to experience problems.
- However, occasionally instead of Lightdm starting, the screen shows a
- white box in the centre of the screen, surrounded by black bands.
+ Most of the time, Plymouth is shown fine, and everything is great.
+ However, occasionally Plymouth is shown garbled, there's little blobs of
+ colour (Sorry I can't provide much information because Plymouth is only
+ shown for a little while during my boot).
- moving the mouse leaves vertical artefacts on the screen, which makes me
- think that X/Lightdm hasn't froze, but I see no HDD activity when I
- enter my password and press enter (Maybe Lightdm crashes, leaving X (and
- mouse input) working fine?).
+ Then I see vertical bands of colour, it kind of looks like my display
+ has been stretched vertically and the whole display is 1px tall. (I have
+ posted some videos showing the behaviour below).
- Switching to any TTY clears the screen, however the only thing visible
- is a blinking vertical band (which moves along as I type my user-name
- and password to try to log in through a TTY)
+ I can log in, log out, switch to TTY's - do whatever, but the screen
+ still has vertical bands on it. Moving the mouse causes the bands to
+ change/update.
- From here I run:
- sudo shutdown -h now
- and enter my password again.
+ Switching to any TTY shows a blinking vertical line, which moves along
+ as I type commands, but it's impossible to see them (you can just see
+ the blinking cursor)
- The computer then restarts and is back to normal.
+ I can SSH into the computer and collect any logs if they are needed.
- The next time this happens I will try running:
- sudo pkill x
- To see if that can cause X to restart and show normally.
+ I then force shut-down the laptop and restart and everything works fine.
- I will attach a photo I took, and some mockups of the behavior in the
- TTY terminal.
-
- WHAT I EXPECTED TO HAPPEN:
- =========================
- I expected the computer to show Lightdm and allow me to log in normally and
use my computer
- (which it does do, nearly most of the time)
+ The only kernel command I have added is acpi_backlight=vendor (to be
+ able to set the backlight brightness)
lsb_release -rd
===========
- Description: Ubuntu precise (development branch)
+ Description: Ubuntu 12.04 LTS
Release: 12.04
- apt-cache policy xorg and apt-cache policy lightdm (I believe this might be a
Lightdm bug too.)
+ apt-cache policy xorg and apt-cache policy xserver-xorg-video-intel
==========================================================================
xorg:
Installed: 1:7.6+12ubuntu1
Candidate: 1:7.6+12ubuntu1
Version table:
*** 1:7.6+12ubuntu1 0
500 http://gb.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
- lightdm:
- Installed: 1.2.0-0ubuntu2
- Candidate: 1.2.0-0ubuntu2
+ xserver-xorg-video-intel:
+ Installed: 2:2.17.0-1ubuntu4
+ Candidate: 2:2.17.0-1ubuntu4
Version table:
- *** 1.2.0-0ubuntu2 0
+ *** 2:2.17.0-1ubuntu4 0
500 http://gb.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
100 /var/lib/dpkg/status
+
+ Below here is information from the original bug report (Before I
+ upgraded from 12.04 Beta 1 to 12.04 (Final)).
+
+ =========================
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+12ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:
-
+
ApportVersion: 2.0.1-0ubuntu1
Architecture: amd64
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: None
Date: Thu Apr 12 17:15:47 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
- bcmwl, 5.100.82.38+bdcom, 3.2.0-17-generic, x86_64: installed
- bcmwl, 5.100.82.38+bdcom, 3.2.0-21-generic, x86_64: installed
- bcmwl, 5.100.82.38+bdcom, 3.2.0-22-generic, x86_64: installed
- bcmwl, 5.100.82.38+bdcom, 3.2.0-23-generic, x86_64: installed
+ bcmwl, 5.100.82.38+bdcom, 3.2.0-17-generic, x86_64: installed
+ bcmwl, 5.100.82.38+bdcom, 3.2.0-21-generic, x86_64: installed
+ bcmwl, 5.100.82.38+bdcom, 3.2.0-22-generic, x86_64: installed
+ bcmwl, 5.100.82.38+bdcom, 3.2.0-23-generic, x86_64: installed
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GraphicsCard:
- Intel Corporation 2nd Generation Core Processor Family Integrated Graphics
Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
- Subsystem: Acer Incorporated [ALI] Device [1025:0504]
+ Intel Corporation 2nd Generation Core Processor Family Integrated Graphics
Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
+ Subsystem: Acer Incorporated [ALI] Device [1025:0504]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
Lsusb:
- Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
- Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
- Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
- Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
- Bus 001 Device 003: ID 1bcf:288a Sunplus Innovation Technology Inc.
+ Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
+ Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
+ Bus 001 Device 003: ID 1bcf:288a Sunplus Innovation Technology Inc.
MachineType: Acer Aspire 5750
ProcEnviron:
- LANGUAGE=en_GB:en
- PATH=(custom, no user)
- LANG=en_GB.UTF-8
- SHELL=/bin/bash
+ LANGUAGE=en_GB:en
+ PATH=(custom, no user)
+ LANG=en_GB.UTF-8
+ SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic
root=UUID=294c451d-e2ed-4cfd-bbfe-9c443dd1a944 ro quiet splash
acpi_backlight=vendor vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/24/2011
dmi.bios.vendor: Acer
dmi.bios.version: V1.11
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: JE50_HR
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.11
dmi.modalias:
dmi:bvnAcer:bvrV1.11:bd05/24/2011:svnAcer:pnAspire5750:pvrV1.11:rvnAcer:rnJE50_HR:rvrBaseBoardVersion:cvnAcer:ct10:cvrV1.11:
dmi.product.name: Aspire 5750
dmi.product.version: V1.11
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.7.4-0ubuntu3
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20111201+b5534a1-1build2
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https://bugs.launchpad.net/bugs/980058
Title:
Sometimes see vertical bands, artifacts across screen after boot
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