Ubuntu
konsole package

Konsole font rendering with HiDPI display scaling: glyphs cut off vertically

Bug #1654875 reported by Horst Schirmeier
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
konsole (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

Depending on the text-cursor position (e.g., in vim), glyphs in a complete text line in Konsole are cut off vertically. These characters need not be fancy Unicode ones, plain ASCII suffices.

Konsole font is the default one here (Oxygen Mono, 9.0), but due to my Hi-DPI display (14" with 2560x1440px) I set "Force fonts DPI" to 192 in KDE's Settings->Appearance->Font->Fonts.

This seems to have already been reported and fixed upstream, it may suffice to back-port the patch.
https://bugs.kde.org/show_bug.cgi?id=371687 -- which has a duplicate here https://bugs.kde.org/show_bug.cgi?id=336832 showing this screenshot: https://bugsfiles.kde.org/attachment.cgi?id=87451

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: konsole 4:16.04.3-0ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-32.34-generic 4.8.11
Uname: Linux 4.8.0-32-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CurrentDesktop: KDE
Date: Sun Jan 8 18:32:08 2017
InstallationDate: Installed on 2016-11-26 (43 days ago)
InstallationMedia: Kubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.1)
SourcePackage: konsole
UpgradeStatus: No upgrade log present (probably fresh install)

Revision history for this message
Horst Schirmeier (horst) wrote :
Revision history for this message
Horst Schirmeier (horst) wrote :

Also reproducible with the "Hack" font instead of "Oxygen Mono", and/or disabling the fonts setting "Force fonts DPI".

Revision history for this message
Horst Schirmeier (horst) wrote :

How I created the screenshot: Create text file with sufficient number of lines; open with vim; move cursor down until I'm at the terminal's last line and beyond; move back up until cursor is about in the vertical middle of the terminal.

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in konsole (Ubuntu):
status: New → Confirmed
Revision history for this message
Horst Schirmeier (horst) wrote :

... did I mention this bug makes Konsole unusable for anything like programming or text editing? This is so annoying I really wonder why something like this can make into an Ubuntu release, actually.

Revision history for this message
Horst Schirmeier (horst) wrote :

Update: This seems to be triggered by a fractional (> 1, but < 2, 1.4 in my case) Displays -> Scale -> Scale Factor setting (which is meant for HiDPI displays, and probably for people with sight issues), not "Force fonts DPI".

This upstream bug report seems to be related: https://bugs.kde.org/show_bug.cgi?id=373232

summary: - Konsole font rendering: glyphs cut off vertically
+ Konsole font rendering with HiDPI display scaling: glyphs cut off
+ vertically
Revision history for this message
Bruno Randolf (br1-l) wrote :

A possible workaround is to create a sddm.conf (with sddm --example-config > /etc/sddm.conf) and add "-dpi 144" to ServerArguments. Then set Scale to 1 in System Settings and reboot.

To post a comment you must log in.
This report contains Public information  
Everyone can see this information.
Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.