CID: 201202-10511 Dell Inspiron 5420
After boot to desktop, there will be an "Unknown" display work as an extended display on this system with 12.04.5
The problem with this issue is that you will be able to move the cursor out of your screen, even open an application on the extended display.
Steps:
1. Install 12.04.5, boot to desktop with no external monitor connected
2. Open the "Display" utility, check whether there is an "Unknown" display
Expected result:
* There should be only a "Laptop" display
Actual result:
* An "Unknown" display available
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.13.0-32-generic 3.13.0-32.57~precise1 [modified: boot/vmlinuz-3.13.0-32-generic]
ProcVersionSignature: Ubuntu 3.13.0-32.57~precise1-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Mon Aug 11 22:36:12 2014
InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-lts-trusty
UpgradeStatus: No upgrade log present (probably fresh install)
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-85-generic.
ApportVersion: 2.0.1-0ubuntu17.13
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CX20590 Analog [CX20590 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 1930 F.... pulseaudio
CRDA:
country TW:
(2402 - 2472 @ 40), (3, 27)
(5270 - 5330 @ 40), (3, 17), DFS
(5735 - 5815 @ 40), (3, 30)
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xb1a10000 irq 46'
Mixer name : 'Intel PantherPoint HDMI'
Components : 'HDA:14f1506e,1028055e,00100002 HDA:80862806,80860101,00100000'
Controls : 27
Simple ctrls : 10
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=0cbc4d1f-a6f7-4398-a928-15aee8a03533
InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
MachineType: Dell Inc. Inspiron 5420
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
0 inteldrmfb
1 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-85-generic root=UUID=34d03260-41c4-47df-b29f-e585414ee516 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-85.129~precise1-generic 3.13.11-ckt36
RelatedPackageVersions:
linux-restricted-modules-3.13.0-85-generic N/A
linux-backports-modules-3.13.0-85-generic N/A
linux-firmware 1.79.18
StagingDrivers: rts5139
Tags: precise running-unity staging
Uname: Linux 3.13.0-85-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 07/24/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: X58
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrX58:bd07/24/2012:svnDellInc.:pnInspiron5420:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Inspiron 5420
dmi.sys.vendor: Dell Inc.
When having external monitor connected, you will see 3 displays in the Display utility