Public bug reported:
I'm using UX21A Asus Zenbook Prime.
When I connected HDMI socket to an external display and turn on the
laptop, Ubuntu didn't show build in display even it said display was
recognized and activated. It happened on Ubuntu 16.04 and Linux Mint 18
Mint even when they were started as Live USB booting.
When I switched off the build in display and reactivate it through
Display Setting GUI, it started showing. But with xrandr command, it
didn't.
I unplugged HDMI and turn on the laptop and plug HDMI again after
confirmed the BIOS Logo, the problem didn't show up.
The situation I confirmed on several environment were all the same.
It suppose to be caused by a problem which the laptop considers the
external display as primary one.
So currently, I unplug the HDMI when I start it up.
I also asked in askubuntu.com but it doesn't seem I could get the
feedback. This is my first bug repport and please be kind.
sudo lspci -vnvn > lspci-vnvn.log
returns
Ubuntu 4.4.0-38.57-generic 4.4.19
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "lspci-vnvn.log"
https://bugs.launchpad.net/bugs/1631678/+attachment/4757730/+files/lspci-vnvn.log
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https://bugs.launchpad.net/bugs/1631678
Title:
Build in display doesn't show a screen
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