[Natty,Maverick,Lucid] External monitor connected w/ Display Port power management not working when laptop LCD powered off
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
gnome-power-manager (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: xorg
When an external monitor is connected to my Thinkpad T400s using the Display Port connection, the monitor never goes into an energy saving state despite the Gnome power saving settings being enabled. Gnome screen saver activates, but this does not conserve energy of course.
This bug occurs only when the laptop lid is closed. The bug does not occur when the laptop lid is open.
I have seen this problem with Lucid, Maverick and now the latest daily build of Natty.
ubuntu-bug xorg crashed, so I don't know if you received the extra information you need or not. I will include some information here that might be relevant, just in case:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device 20e4
Flags: bus master, fast devsel, latency 0, IRQ 45
Memory at f2000000 (64-bit, non-prefetchable) [size=4M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 1800 [size=8]
Expansion ROM at <unassigned> [disabled]
Kernel driver in use: i915
Kernel modules: i915
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
Subsystem: Lenovo Device 20e4
Flags: bus master, fast devsel, latency 0
Memory at f2400000 (64-bit, non-prefetchable) [size=1M]
Linux version 2.6.38-1-generic (buildd@allspice) (gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-2ubuntu1) ) #28-Ubuntu SMP Fri Jan 28 15:26:43 UTC 2011
I run the 64 bit versions of natty / maverick / lucid.
$apt-cache policy xorg
xorg:
Installed: 1:7.5+6ubuntu8
Candidate: 1:7.5+6ubuntu8
Version table:
*** 1:7.5+6ubuntu8 0
500 http://
100 /var/lib/
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.5+6ubuntu8
ProcVersionSign
Uname: Linux 2.6.38-1-generic x86_64
Architecture: amd64
DRM.card0.DP.1:
status: connected
enabled: enabled
dpms: On
modes: 1920x1200 1600x1200 1680x1050 1600x1000 1280x1024 1280x1024 1280x960 1152x864 1024x768 1024x768 832x624 800x600 800x600 640x480 640x480 720x400
edid-base64: AP/////
DRM.card0.DP.2:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.DP.3:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.HDMI.A.2:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
DRM.card0.LVDS.1:
status: connected
enabled: enabled
dpms: Off
modes: 1440x900 1440x900
edid-base64: AP/////
DRM.card0.VGA.1:
status: disconnected
enabled: disabled
dpms: Off
modes:
edid-base64:
Date: Tue Feb 1 05:22:05 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
GdmLog1: Not present
GdmLog2: Not present
GraphicsCard:
Subsystem: Lenovo Device [17aa:20e4]
Subsystem: Lenovo Device [17aa:20e4]
LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110131)
MachineType: LENOVO 2801CTO
ProcEnviron:
LANGUAGE=
LANG=en_US.UTF-8
LC_MESSAGES=
SHELL=/bin/bash
ProcKernelCmdLine: noprompt cdrom-detect/
SourcePackage: xorg
UnitySupportTest:
dmi.bios.date: 12/09/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6HET34WW (1.19 )
dmi.board.name: 2801CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 2801CTO
dmi.product.
dmi.sys.vendor: LENOVO
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.
version.
version.
version.
version.
affects: | xorg (Ubuntu) → xserver-xorg-video-intel (Ubuntu) |
tags: | added: lucid maverick |
tags: | added: dual-head |
Changed in gnome-power-manager (Ubuntu): | |
status: | New → Confirmed |
A clarification: when I say the bug does not occur when the laptop lid is open, I should have added the important proviso that the laptop LCD panel should be an active display in addition to the external monitor. That is, both displays must be displaying the desktop. It is not important which mode is used, i.e. whether "Same image in all monitors" is checked in the Gnome Monitor Preferences or not.
If the lid is merely open but the laptop LCD is powered off, the bug occurs.