Logon screen black

[Bruce Pieterse]

This might be related to bug #525038. When starting up, the screen goes black (actually it looks like the backlight is not on) either instantly when plymouth starts or a few seconds after. The login screen appears, I typed my password and the screen is still black after logging in.

However, if I press F2 (decrease brightness) or F3 (increase brightness), not Fn + F2 or F3, then the display will come back on instantly. If I increase the brightness to its maximum setting and then decrease the brightness to the minimum setting using F2 & F3 respectively, I get the same effect when plymouth starts (no backlight).

The brightness indicator that ubuntu shows when adjusting the brightness gives me only four levels going from 100% to 0%:
0 = 100% Brightness
1 = 60% Brightness
2 = 15% Brightness
3 = No backlight;

and 3 levels when going from 0% to 100%
0 = 40%
1 = 80%
2 = 100%

That's all the info I can give for now. If I wanted to get the Fn key working what package would I report that against?

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xorg 1:7.6+7ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.23-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,mousepoll,wall,regex,snap,grid,imgpng,move,place,animation,resize,vpswitch,session,expo,unitymtgrabhandles,gnomecompat,fade,workarounds,scale,ezoom,unityshell]
CompositorRunning: compiz
Date: Mon Sep 19 21:42:24 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
EcryptfsInUse: Yes
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: Hewlett-Packard Company Device [103c:1672]
 ATI Technologies Inc NI Seymour [AMD Radeon HD 6470M] [1002:6760] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1672]
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 002 Device 003: ID 05c8:021e Cheng Uei Precision Industry Co., Ltd (Foxlink)
MachineType: Hewlett-Packard HP Pavilion g7 Notebook PC
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=4f73a571-a2eb-463f-a0b7-c04d93acd93f ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/28/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.32
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1672
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 09.36
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.32:bd07/28/2011:svnHewlett-Packard:pnHPPaviliong7NotebookPC:pvr0593110000204610000620100:rvnHewlett-Packard:rn1672:rvr09.36:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion g7 Notebook PC
dmi.product.version: 0593110000204610000620100
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.5.94+bzr2803-0ubuntu5
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

[Bruce Pieterse (octoquad)]

Still persisting after all updates installed as of today.

[Bruce Pieterse (octoquad)]

Using the xbacklight tool the actual values for 0-100% is actually 0%, 20%, 60% & 100%. It seems the current value of the backlight is not being stored when shutting down and on reboot has a value of 0%.

[MNM (mahesh-mach)]

Do you think you can run the same script (fixbacklight.sh) as discussed in Bug #875831 during start up using start up applications?

http://askubuntu.com/questions/814/how-to-run-scripts-on-start-up-of-ubuntu : Discusses different ways you can set up things to run on start up.

[Bryce Harrington (bryce)]

Hey octoquad,

Hi, thanks for reporting this issue during the development period of
Ubuntu.

I notice there's not been further comments to the bug report since the
release came out, would you mind updating us on the status of it in the
release?

Are you still able to reproduce the issue? If not, do you think the bug
report can be closed, or do you think we should continue tracking it?

[Bruce Pieterse (octoquad)]

Hi Bryce,

This issue still persists as of today. I will re-install with the recent ISO to see if the issue can be resolved. Probably something went wrong from Beta -> Beta 2 -> Release.

[Bruce Pieterse (octoquad)]

Hi Bryce,

After a re-installation the problem still persists (all updates applied). How can we get this resolved?

[Sebastien Bacher (seb128)]

The issue doesn't seem likely to be a gsd one, does it happen in non gnome sessions? what login manager do you use?

[Bruce Pieterse (octoquad)]

Hi Sebastien,

It looks like the plymouth portion is not invalid anymore, as soon as lightdm starts the backlight switches off. Current version of lightdm is lightdm_1.0.6-0ubuntu1.1_amd64.deb. I have attached the most recent logs for lightdm. In x-0-greeter.log there are a few errors and warnings which might possibly related.

[Bruce Pieterse (octoquad)]

Sorry I meant, the plymouth portion is no longer valid.

[Launchpad Janitor (janitor)]

[Expired for gnome-settings-daemon (Ubuntu) because there has been no activity for 60 days.]

[Bruce Pieterse (octoquad)]

Still present in precise, fresh install.

[Bruce Pieterse (octoquad)]

Found the problem.

When booting up the default value of /sys/class/backlight/acpi_vidoe0/brightness is 0. I have updated my /etc/rc.local and have added the following line before exit 0:

echo 5 > /sys/class/backlight/acpi_video0/brightness.

Restarted, and it works :)

Not to sure if this is a bug really, or hardware specific, so please feel free to close or update the relevant packages.