Comment 13 for bug 397839

Thanks for the report. Could you kill GPM right after loading into
gnome and see if the screen blanking happens later on in the session?

command in terminal:
killall gnome-power-manager

I'm experiencing the same bug and wanted to see if it is related to:
http://blogs.gnome.org/hughsie/2009/07/30/accidental-blanking-and-gnome-power-manager/
bug #387529
commit: http://git.gnome.org/cgit/gnome-power-manager/commit/?id=b5cf34d4b9861ab916a3ff74a2a08093ccb75b9f

If the bug remains after killing GPM, it appears to be related to the
above blog posting in that there is a bug in gnome-session.

On Wed, Aug 5, 2009 at 7:35 AM, Sebastien Bacher<email address hidden> wrote:
> The issue seems similar to
> https://bugzilla.redhat.com/show_bug.cgi?id=501601
>
> ** Bug watch added: Red Hat Bugzilla #501601
>   https://bugzilla.redhat.com/show_bug.cgi?id=501601
>
> --
> Screen randomly goes off in karmic
> https://bugs.launchpad.net/bugs/397839
> You received this bug notification because you are subscribed to gnome-
> power-manager in ubuntu.
>
> Status in X.org XServer - ATI gfx chipset driver: Confirmed
> Status in “gnome-power-manager” package in Ubuntu: New
>
> Bug description:
> Binary package hint: xserver-xorg-video-ati
>
> Sometimes the internal laptop display (LVDS) goes off (like a DPMS standby) for no reason (there is user activity going on).
> Moving the mouse or typing on the keyboard makes the screen turn on again (no password request or user logout happens)
>
> This happens on a fully updated Karmic with a mobility radeon X700 using the standard radeon driver.
>
> ProblemType: Bug
> Architecture: i386
> Date: Fri Jul 10 15:11:22 2009
> DistroRelease: Ubuntu 9.10
> Lsusb:
>  Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> MachineType: Acer, inc. Yspire 1690
> Package: xserver-xorg-video-ati 1:6.12.99+git20090629.f39cafc5-0ubuntu1
> ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-2-generic root=UUID=79c83fad-2c20-4754-b080-8a8e9e451b51 ro quiet splash
> ProcEnviron:
>  LANG=it_IT.UTF-8
>  SHELL=/bin/bash
> ProcVersionSignature: Ubuntu 2.6.31-2.16-generic
> RelatedPackageVersions:
>  xserver-xorg 1:7.4+3ubuntu5
>  libgl1-mesa-glx 7.5~rc4-1ubuntu3
>  libdrm2 2.4.11-1ubuntu1
>  xserver-xorg-video-intel 2:2.7.99.901+git20090702.74227141-0ubuntu1
>  xserver-xorg-video-ati 1:6.12.99+git20090629.f39cafc5-0ubuntu1
> SourcePackage: xserver-xorg-video-ati
> Uname: Linux 2.6.31-2-generic i686
> dmi.bios.date: 03/14/06
> dmi.bios.vendor: Acer
> dmi.bios.version: 3A44
> dmi.board.name: Crane II
> dmi.board.vendor: Acer, Inc.
> dmi.board.version: Not Applicable
> dmi.chassis.type: 1
> dmi.chassis.vendor: , Inc.
> dmi.chassis.version: N/A
> dmi.modalias: dmi:bvnAcer:bvr3A44:bd03/14/06:svnAcer,inc.:pnYspire1690:pvrNotApplicable:rvnAcer,Inc.:rnCraneII:rvrNotApplicable:cvn,Inc.:ct1:cvrN/A:
> dmi.product.name: Yspire 1690
> dmi.product.version: Not Applicable
> dmi.sys.vendor: Acer, inc.
> fglrx: Not loaded
> system:
>  distro:             Ubuntu
>  architecture:       i686kernel:             2.6.31-2-generic
>