Public bug reported:
I usually use one monitor but have two plugged in. If I go to the
Displays control panel and set the secondary monitor to On, that
sometimes turns Off my primary monitor. Even if it doesn't, then
toggling Off the secondary monitor again will usually also turn Off the
primary monitor too(!). Now all my monitors are in sleep mode and even
switching VTs usually doesn't wake them up. My machine is useless until
I do a blind reboot with: Ctrl+Alt+F1, Ctrl+Alt+Del.
This bug has been a problem for me in Ubuntu 11.04 and 11.10, with
kernels 2.6.38 and 3.0 using either Intel graphics (i915) or ATI
(radeon). The common factor seems to be the fact that they're KMS
drivers.
I have today tested mainline kernels 3.1 and 3.2-rc1 and am delighted to
say that the bug is fixed in both new kernels, at least on Intel.
Haven't re-tested with radeon.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-generic 3.0.0.12.14
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dan 1639 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xe1b60000 irq 50'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0269,1028047e,00100100
HDA:80862805,80860101,00100000'
Controls : 23
Simple ctrls : 14
Date: Tue Nov 8 13:30:42 2011
HibernationDevice: RESUME=UUID=dc519abf-a9df-4370-b15d-de72dbd8a9a9
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
MachineType: Dell Inc. OptiPlex 990
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic
root=UUID=c9a0c042-2d94-4c4b-bb7f-756faf723ada ro quiet splash intel_iommu=on
reboot=pci vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.0.0-12-generic N/A
linux-backports-modules-3.0.0-12-generic N/A
linux-firmware 1.60
RfKill:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/28/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0D6H9T
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 15
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA05:bd05/28/2011:svnDellInc.:pnOptiPlex990:pvr01:rvnDellInc.:rn0D6H9T:rvrA00:cvnDellInc.:ct15:cvr:
dmi.product.name: OptiPlex 990
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
** Affects: linux
Importance: Undecided
Status: Fix Released
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug oneiric running-unity staging
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https://bugs.launchpad.net/bugs/887425
Title:
Primary monitor turns off when I turn a secondary monitor on or off
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