Comment 4 for bug 397839

Forwarding this bug from Ubuntu reporter Giovanni Condello:
https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/397839

[Problem]
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.

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 915GM/PM/GMS/910GML Express Processor to DRAM Controller [8086:2590] (rev 03)
 Subsystem: Acer Incorporated [ALI] Device [1025:0066]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc Radeon Mobility X700 (PCIE) [1002:5653]
 Subsystem: Acer Incorporated [ALI] Device [1025:0066]

[More Info]
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