This happens at times but with high possibility to reproduce.
On the extended monitor or mirror mode, sometimes the external monitor becomes blank and loses the signal.
---
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: ubuntu 1534 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xdfc00000 irq 49'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0269,104313c7,00100100 HDA:80862805,80860101,00100000'
Controls : 18
Simple ctrls : 10
CurrentDmesg:
[ 22.237101] init: plymouth-stop pre-start process (1367) terminated with status 1
[ 22.793424] [drm] Changing LVDS panel from (-hsync, -vsync) to (-hsync, +vsync)
[ 23.231518] EXT4-fs (sda3): re-mounted. Opts: errors=remount-ro,commit=0
[ 27.055103] wlan0: no IPv6 routers present
[ 119.540120] atl1c 0000:04:00.0: vpd r/w failed. This is likely a firmware bug on this device. Contact the card vendor for a firmware update.
DistributionChannelDescriptor:
# This is a distribution channel descriptor
# For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-beitou-20111219-0
DistroRelease: Ubuntu 11.10
HibernationDevice: RESUME=UUID=a6d39502-b1da-4fee-b39b-e4f1bd78b0ff
InstallationMedia: Ubuntu 11.10 "Oneiric" - Build amd64 LIVE Binary 20111219-01:11
MachineType: ASUSTeK Computer Inc. K54C
Package: linux 3.0.0.14.16
PackageArchitecture: amd64
ProcEnviron:
LANGUAGE=en_US:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-14-generic root=UUID=581e665d-03bf-4b35-bc6d-873040f2e20b ro quiet splash acpi_sleep=nonvs acpi_backlight=vendor acpi.brightness_switch_enabled=0 vt.handoff=7
ProcVersionSignature: Ubuntu 3.0.0-14.23beitou1-generic 3.0.9
PulseSinks:
Error: command ['pacmd', 'list-sinks'] failed with exit code 1: Home directory /home/ubuntu not ours.
No PulseAudio daemon running, or not running as session daemon.
PulseSources:
Error: command ['pacmd', 'list-sources'] failed with exit code 1: Home directory /home/ubuntu not ours.
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.0.0-14-generic N/A
linux-backports-modules-3.0.0-14-generic N/A
linux-firmware 1.60
StagingDrivers: mei
Tags: oneiric staging
Uname: Linux 3.0.0-14-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
dmi.bios.date: 11/17/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: K54C.T11
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: K54C
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrK54C.T11:bd11/17/2011:svnASUSTeKComputerInc.:pnK54C:pvr1.0:rvnASUSTeKComputerInc.:rnK54C:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: K54C
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
apport information