Comment 0 for bug 899598

Speaking with the intel driver developers they told me there was a mistake on how the needed bandwidth was calculated resulting in higher resolutions not being accepted because the driver though DisplayPort did not have enough bandwidth for it.

Commit cd9dde44f47501394b9f0715b6a36a92aa74c0d0 from the linux kernel should be backported to fix it (I have build a local package and i can verify it fixes the problem)

http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=commit;h=cd9dde44f47501394b9f0715b6a36a92aa74c0d0

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image (not installed)
ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
Uname: Linux 3.0.0-13-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: ALC665 Analog [ALC665 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: tsdgeos 1974 F.... pulseaudio
CRDA: Error: [Errno 2] El fitxer o directori no existeix
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xf1c00000 irq 52'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:10ec0665,102804b6,00100003 HDA:80862805,80860101,00100000'
   Controls : 27
   Simple ctrls : 13
Date: Sat Dec 3 15:11:01 2011
HibernationDevice: RESUME=UUID=07110fa9-417f-4300-b034-16a190a16dce
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: Dell Inc. Dell System XPS L502X
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic root=UUID=5a15ae34-5eea-4f4e-8b2a-3bfb20eb9f35 ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-13-generic N/A
 linux-backports-modules-3.0.0-13-generic N/A
 linux-firmware 1.60
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/20/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0YR8NN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd10/20/2011:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0YR8NN:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L502X
dmi.sys.vendor: Dell Inc.