It may be a problem with Compiz.  I have not yet run into the problem with
Xubuntu 11.04 on the same machine.

On Sun, May 1, 2011 at 12:57, Prada <email address hidden> wrote:

> By the way, there are other problems with Intel Graphics on Linux.
> For example, if I use "xset dpms force off" to turn off the laptop screen I
> get a frozen pc where only the mouse pointer moves. Then I have to force a
> shut down with the power button.
>
>  I wish Intel did something about its buggy driver!
>
> --
> You received this bug notification because you are a direct subscriber
> of the bug.
> https://bugs.launchpad.net/bugs/614238
>
> Title:
>  Intel Core i3 External Monitor Wavy Output
>
> Status in The Linux Kernel:
>  Confirmed
> Status in “linux” package in Ubuntu:
>  Triaged
> Status in “linux” source package in Natty:
>  Triaged
>
> Bug description:
>  A similar problem with Lucid was reported mainly by users of ATi
>  Radeon graphics hardware. I also experienced the "wavy" output in
>  Lucid, although the graphics h/w is the integrated intel that comes
>  with the Core i3 processors.
>
>  It is easy to reproduce. Just plug in an external monitor or
>  projector. The output is not stable/solid and has waves that make it
>  unusable.
>
>  I tried the Maverick Alpha3 to see if it had been addressed in the
>  2.6.35 kernel but the problem is still apparent.
>
>  The LCD display of the Laptop is rock solid and sharp. This only
>  affects the external VGA from what I can tell. I do not have any hdmi
>  devices to test with so cannot confirm if the symptoms are just VGA or
>  any external monitor connection.
>
>  Similar bug reports from Lucid include: 537640, 541501, 557814, 562138
>  although these all seem to relate to the ATI chipsets, the description
>  of the problem sounds the same.
>
>  I am happy to try upstream kernels and build/patch/compile if
>  necessary.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 10.10
>  Package: linux-image-2.6.35-14-generic 2.6.35-14.19
>  Regression: No
>  Reproducible: Yes
>  ProcVersionSignature: Ubuntu 2.6.35-14.19-generic 2.6.35
>  Uname: Linux 2.6.35-14-generic i686
>  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
>  Architecture: i386
>  ArecordDevices:
>   **** List of CAPTURE Hardware Devices ****
>   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
>     Subdevices: 1/1
>     Subdevice #0: subdevice #0
>  AudioDevicesInUse:
>   USER        PID ACCESS COMMAND
>   /dev/snd/controlC0:  alord      1578 F.... pulseaudio
>  CRDA: Error: [Errno 2] No such file or directory
>  Card0.Amixer.info:
>   Card hw:0 'Intel'/'HDA Intel at 0xfc700000 irq 46'
>     Mixer name : 'Intel IbexPeak HDMI'
>     Components : 'HDA:10ec0269,144dc06a,00100004
> HDA:80862804,80860101,00100000'
>     Controls      : 19
>     Simple ctrls  : 9
>  Date: Fri Aug  6 07:47:00 2010
>  HibernationDevice: RESUME=UUID=bc66e046-4afc-4cb6-aa3e-d0f114e960e3
>  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386
> (20100803.1)
>  Lsusb:
>   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
>   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>   Bus 001 Device 003: ID 1210:25f4 DigiTech
>   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
>   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>  MachineType: SAMSUNG ELECTRONICS CO., LTD. R530/R730
>  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-14-generic
> root=UUID=3364d8e7-11e8-4000-a32e-8bfca4cac5aa ro quiet splash
>  ProcEnviron:
>   LANG=en_GB.utf8
>   SHELL=/bin/bash
>  RelatedPackageVersions: linux-firmware 1.37
>  RfKill:
>   0: phy0: Wireless LAN
>    Soft blocked: no
>    Hard blocked: no
>  SourcePackage: linux
>  dmi.bios.date: 03/12/2010
>  dmi.bios.vendor: Phoenix Technologies Ltd.
>  dmi.bios.version: 03JV.M011.20100312.hkk
>  dmi.board.asset.tag: Tag 12345
>  dmi.board.name: R530/R730
>  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
>  dmi.board.version: Not Applicable
>  dmi.chassis.asset.tag: No Asset Tag
>  dmi.chassis.type: 9
>  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
>  dmi.chassis.version: N/A
>  dmi.modalias:
> dmi:bvnPhoenixTechnologiesLtd.:bvr03JV.M011.20100312.hkk:bd03/12/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR530/R730:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR530/R730:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
>  dmi.product.name: R530/R730
>  dmi.product.version: Not Applicable
>  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
>
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>