Resolution not detected correctly on Intel Mobile 4 series

[stefano.fraccaro]

Ubuntu 12.04 and Lubuntu 12.04 detect as unique video resolution 1024x768 but this monitor support higher resolutions up to 1366x768. I have already asked in askubuntu.com
https://answers.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+question/194568/

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
.tmp.unity.support.test.1:

ApportVersion: 2.0.1-0ubuntu5
Architecture: amd64
CasperVersion: 1.315
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Fri Apr 27 14:00:11 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:048a]
   Subsystem: Acer Incorporated [ALI] Device [1025:048a]
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
MachineType: Acer TravelMate 5735
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash -- nomodeset debian-installer/language=it keyboard-configuration/layoutcode?=it
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/23/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.04
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: BA51_MV
dmi.board.vendor: Acer
dmi.board.version: V1.04
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.04
dmi.modalias: dmi:bvnAcer:bvrV1.04:bd09/23/2010:svnAcer:pnTravelMate5735:pvrV1.04:rvnAcer:rnBA51_MV:rvrV1.04:cvnAcer:ct10:cvrV1.04:
dmi.product.name: TravelMate 5735
dmi.product.version: V1.04
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.7.6-0ubuntu1
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

[stefano.fraccaro (sf-1)]

Without nomodeset the system hang while booting with a black screen and no terminal are available with Ctrl+Alt+F1. I have added nomodeset to the kernel parameters for this reason.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Patrick Gillespie (vermontpoet)]

Not sure if this is the same bug, but on two separate laptops, after enabling an external monitor, Ubuntu no longer correctly detects the laptops' native screen resolutions when the external monitor is disconnected.

Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)

[Chris Wilson (ickle)]

Limitation of the VESA driver. We need to investigate the KMS hang.