On my Leveno Y580, when the display manager starts, the screen brightness is set to the lowest possible level. On this laptop, it means the backlight is totally off, so you get nothing on screen at all.
Turning up the brightness with hotkeys works, but this has to be done on every boot, and it appears to the user that the display is not working at all.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xorg 1:7.7+1ubuntu4
Uname: Linux 3.8.0-030800rc3-generic i686
.tmp.unity.support.test.0:
ApportVersion: 2.8-0ubuntu4
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Sat Feb 2 18:39:06 2013
DistUpgraded: 2013-01-13 20:08:25,533 DEBUG enabling apt cron job
DistroCodename: raring
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device [17aa:3977]
InstallationDate: Installed on 2012-12-19 (45 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
MachineType: LENOVO 2099
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-030800rc3-generic root=/dev/mapper/ubuntu-root ro vesafb.invalid=1
SourcePackage: xorg
UpgradeStatus: Upgraded to raring on 2013-01-13 (19 days ago)
dmi.bios.date: 08/23/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 5DCN89WW(V8.00)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: INVALID
dmi.board.vendor: LENOVO
dmi.board.version: 31900003WIN8 STD MLT
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad Y580
dmi.modalias: dmi:bvnLENOVO:bvr5DCN89WW(V8.00):bd08/23/2012:svnLENOVO:pn2099:pvrLenovoIdeaPadY580:rvnLENOVO:rnINVALID:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadY580:
dmi.product.name: 2099
dmi.product.version: Lenovo IdeaPad Y580
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.9~daily13.01.25-0ubuntu1
version.libdrm2: libdrm2 2.4.41-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.2-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.19-0ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu2
xserver.bootTime: Sat Feb 2 18:36:29 2013
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.2-0ubuntu1
xserver.video_driver: intel
Status changed to 'Confirmed' because the bug affects multiple users.