8086:2a42 emachine e725 boots to valid display with no backlight
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Incomplete
|
Medium
|
Unassigned |
Bug Description
Booting to a black screen, however a flashlight shows a faint login window. I can login, hear the startup sound, but still a black screen.
Again a flashlight on the screen shows a faint desktop. I am assuming the backlight on the laptop is not responding. Pressing the function key and brightness adjustment keys does nothing.
As a work around, adding the boot paramater acip_osi=Linux to Grub on startup allows me to have a screen, However, the function dim keys make it brighter while the function brighter keys make the screen dimmer.
lsb_release -rd
Description: Ubuntu precise (development branch)
Release: 12.04
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+10ubuntu1
ProcVersionSign
Uname: Linux 3.2.0-16-generic x86_64
NonfreeKernelMo
.tmp.unity.
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,
CompositorRunning: compiz
Date: Fri Feb 17 22:26:05 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
bcmwl, 5.100.82.38+bdcom, 3.2.0-15-generic, x86_64: installed
bcmwl, 5.100.82.38+bdcom, 3.2.0-16-generic, x86_64: installed
ExtraDebuggingI
GraphicsCard:
Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Device [1025:0212]
Subsystem: Acer Incorporated [ALI] Device [1025:0212]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120119)
MachineType: eMachines eMachines E725
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/16/2009
dmi.bios.vendor: eMachines
dmi.bios.version: V3.04
dmi.board.
dmi.board.name: eMachines E725
dmi.board.vendor: eMachines
dmi.board.version: V3.04
dmi.chassis.type: 10
dmi.chassis.vendor: eMachines
dmi.chassis.
dmi.modalias: dmi:bvneMachine
dmi.product.name: eMachines E725
dmi.product.
dmi.sys.vendor: eMachines
version.compiz: compiz 1:0.9.7.
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.
version.
version.
version.
version.
version.
version.
version.
affects: | xorg (Ubuntu) → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
importance: | Undecided → High |
tags: | added: kernel-handoff-graphics |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
Changed in linux: | |
importance: | Unknown → Medium |
status: | Unknown → Incomplete |
summary: |
- emachine e725 boots to black screen + emachine e725 boots to valid display with no backlight |
summary: |
- emachine e725 boots to valid display with no backlight + 8086:2a42 emachine e725 boots to valid display with no backlight |
I tried to add this bug to the kernel (where I think it belongs) but was unable due to the kernel was not recognized as a package.