External VGA port on laptop does not work anymore
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned |
Bug Description
I have been using the laptop for almost 2 years now, and I have not had problem connecting to a projector via the external VGA port until recently. Sometime between April and now, there must have been a kernel upgrade that messed it up. I saw a few other bug reports that eventually suggests I go to kernel 3.16.0.
When I was on 3.13.0-63, my VGA output would work with the boot up screen and the log in screen. But once I log on the VGA port seems to be inactive and I can't get the output back. HDMI still seems to work, though the projectors I have access to don't have HDMI inputs.
After I upgraded to 3.16.0, the VGA output would still work during the boot up and log in. Again, once I log on the VGA stopped working. However, when I switched to a text terminal (e.g. Ctrl-Alt-F1) I can see the VGA output again. As soon as I switch back to GUI the VGA output stopped working. The "Display" setting in System Settings cannot find an external monitor, nor could xrandr.
My current work around is to use the HDMI port with an HDMI -> VGA converter. That seems to do the trick for now. Both Display setting and xrandr can see the HDMI connection.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-generic 3.13.0.63.71
ProcVersionSign
Uname: Linux 3.16.0-49-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.13
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: Unity
Date: Sat Sep 12 09:48:27 2015
EcryptfsInUse: Yes
HibernationDevice: RESUME=
InstallationDate: Installed on 2014-01-10 (610 days ago)
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
MachineType: Acer Aspire E1-472
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.127.15
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-08-14 (393 days ago)
dmi.bios.date: 08/16/2013
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: V2.04.
dmi.board.name: EA40_HW
dmi.board.vendor: Acer
dmi.board.version: V2.04.
dmi.chassis.type: 9
dmi.chassis.vendor: Acer
dmi.chassis.
dmi.modalias: dmi:bvnPhoenixT
dmi.product.name: Aspire E1-472
dmi.product.
dmi.sys.vendor: Acer
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