Hello,
I don't know if that here i can post a solution on a problem with i915 series.

i was a "no screen found" after an upgrade of 12.04 to 12.10

i add a i915.conf in /etc/modprobe.conf
with : options i915 modeset=1

my lspci:
00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML 
Express Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 915GM/GMS/910GML Express 
Graphics Controller (rev 03)

if you need more precision i reply with pleasure.
regard,
major_ghz.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1037518

Title:
  Xorg crashed with SIGABRT - FatalError (f=f@entry=0x7f41e2f9a9e2 "no
  screens found")

Status in “xorg-server” package in Ubuntu:
  Triaged

Bug description:
  started system.. first in Ubuntu 3d.. no Unity or panels.

  Rebooted in Gnome.. crashed, no panels.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.10
  Package: xserver-xorg-core 2:1.12.99.904-0ubuntu1
  ProcVersionSignature: Ubuntu 3.5.0-10.10-generic 3.5.1
  Uname: Linux 3.5.0-10-generic x86_64
  ApportVersion: 2.4-0ubuntu7
  Architecture: amd64
  CrashCounter: 1
  Date: Thu Aug 16 07:17:05 2012
  DistUpgraded: 2012-07-25 21:55:38,928 DEBUG enabling apt cron job
  DistroCodename: quantal
  DistroVariant: ubuntu
  ExecutablePath: /usr/bin/Xorg
  GraphicsCard:
   Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller 
[8086:2a42] (rev 07) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:02bc]
     Subsystem: Dell Device [1028:02bc]
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
  MachineType: Dell Inc. Vostro 1520
  ProcCmdline: /usr/bin/X :1 -core -auth /var/run/lightdm/root/:1 -nolisten tcp 
vt7 -novtswitch
  ProcEnviron:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-10-generic 
root=UUID=96a2e78c-772d-4b89-986f-a6f29a921dda ro quiet splash vt.handoff=7
  Signal: 6
  SourcePackage: xorg-server
  StacktraceTop:
   raise () from /lib/x86_64-linux-gnu/libc.so.6
   abort () from /lib/x86_64-linux-gnu/libc.so.6
   OsAbort ()
   ?? ()
   FatalError ()
  Title: Xorg crashed with SIGABRT in raise()
  UpgradeStatus: Upgraded to quantal on 2012-07-26 (21 days ago)
  UserGroups: fuse
  dmi.bios.date: 09/10/2009
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0T816J
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnDellInc.:bvrA04:bd09/10/2009:svnDellInc.:pnVostro1520:pvrNull:rvnDellInc.:rn0T816J:rvr:cvnDellInc.:ct8:cvrN/A:
  dmi.product.name: Vostro 1520
  dmi.product.version: Null
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.8+bzr3249-0ubuntu4
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.38-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.4-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.4-1ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.12.99.904-0ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.99.99~git20120713.6ef1ad6a-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.3-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.1-4~ubuntu1

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