Thank you for your bug report. Not sure what desktop you are using but
that screenshot isn't Ubuntu. Those HiDPI daemon settings don't exist in
GNOME/Ubuntu.
Does it happen on Ubuntu as well? Could you add a journalctl log after
getting the issue?
** Changed in: gnome-shell (Ubuntu)
Importance: Undecided => Low
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1852864
Title:
Fractional Scaling shows a black bar
Status in gnome-shell package in Ubuntu:
Incomplete
Bug description:
The right part of the external screen shows a black bar when using fractional
scaling.
This started happening this week.
Somebody else is also experiencing this problem:
* [ubuntu discourse
post](https://discourse.ubuntu.com/t/x11-hidpi-scaling-available-for-testing-on-disco/10293/23)
*
[photo](https://ubuntucommunity.s3-us-east-2.amazonaws.com/original/2X/5/509069037c78c1e5b461e526236ffeb207de1025.jpg)
Attached monitors:
* External 4K
* Laptop: qhd
Tried connection types:
* HDMI (30hz),
* HDMI over usb-c
* DP over usb-c
Fractional scaling was set up in this way:
`gsettings set org.gnome.mutter experimental-features
"['x11-randr-fractional-scaling']"`
It doesn't seem to be monitor related.
It works when:
* using wayland
* turning off fractional scaling
* during boot and login
Installed software:
* ubuntu 19.04
* Gnome 3.32.1
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