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[Bug 1495110] Re: External VGA port on laptop does not work anymore
Howard Cheng, this bug report is being closed due to your last comment
regarding this being fixed with a BIOS update. For future reference you
can manage the status of your own bugs by clicking on the current status
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** Changed in: linux (Ubuntu)
Importance: Medium => Undecided
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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External VGA port on laptop does not work anymore
Status in linux package in Ubuntu:
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.
DistroRelease: Ubuntu 14.04
Package: linux-image-generic 184.108.40.206.71
ProcVersionSignature: Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15
Uname: Linux 3.16.0-49-generic x86_64
USER PID ACCESS COMMAND
/dev/snd/controlC0: howard 2074 F.... pulseaudio
/dev/snd/controlC1: howard 2074 F.... pulseaudio
Date: Sat Sep 12 09:48:27 2015
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=/boot/vmlinuz-3.16.0-49-generic root=UUID=17eb8564-5cc9-439a-aa44-2160ead649f4 ro quiet splash vt.handoff=7
UpgradeStatus: Upgraded to trusty on 2014-08-14 (393 days ago)
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.product.name: Aspire E1-472
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