Bug 22981

Forwarding this bug from Ubuntu reporter Julian Lam:
http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/402777

[Problem]
monitor turns off after vt switching or on PM events.  Regression since Jaunty (driver 2.7.1 UMS)

[Original Description]
I'm not quite aware of which package this should be reported against, so I am reporting it again xorg in the hopes that someone will come along and re-assign it properly. Thanks!

Ever since upgrading to Karmic, I've been having sporadic problems with my monitor turning off at inappropriate times.

Test case:
Switching to a tty session, and then switching back to tty7. Immediately after, the monitor will blank. Moving the mouse will wake up the monitor again.

This is reproducible for me, every time.

I've also experienced it once or twice when I've accidentally let my laptop power cord unplug. The switch from AC to battery power seems to have triggered an event, and the monitor turned off.

The following events occur in my system log whenever the monitor turns off:
Jul 21 19:13:55 julian-4 acpid: client 3279[0:0] has disconnected
Jul 21 19:13:55 julian-4 acpid: client connected from 3279[0:0]

Architecture: i386
Date: Tue Jul 21 19:09:56 2009
DistroRelease: Ubuntu 9.10
MachineType: Dell Inc. Inspiron 700m
Package: xorg 1:7.4+3ubuntu5
ProcCmdLine: root=UUID=6626164e-9234-49d3-b34b-b06289a7ccf3 ro quiet splash
ProcEnviron:
 LANG=en_CA.UTF-8ProcVersionSignature: Ubuntu 2.6.31-3.19-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: xorg
Uname: Linux 2.6.31-3-generic i686
dmi.bios.date: 05/18/05
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: A04
dmi.board.name: 0D9593
dmi.board.vendor: DELL SYSTEM
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrA04:bd05/18/05:svnDellInc.:pnInspiron700m:pvr-1:rvnDELLSYSTEM:rn0D9593:rvr:cvnDellInc.:ct8:cvrN/A:
dmi.product.name: Inspiron 700m
dmi.product.version: -1
dmi.sys.vendor: Dell Inc.
system: architecture:       i686kernel:             2.6.31-3-generic