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I have Ubuntu Mainline Kernel Installer installed on my Kubuntu 20.04.5 OS. When I want to uninstall an old kernel it gives me an unreadable output ( see picture ).
unreadable output

I think it uses a font that I have not installed. Does anybody knows what font it uses? So I can install the font and make the output readable. I have searched for an answer with good old Dr. Google, but all the pages I looked at don't answer my question.

The program is usable, but obviously I want to be able to read the output.

The kernel I am running is 5.15.0.57.63.

This page (https://trendoceans.com/install-mainline-kernel-in-ubuntu/) shows the output like it should be. output according webpage

Trying Rubo77's answer gives me this output:

patrick@Lappy:~$ LANG=C ubuntu-mainline-kernel-installer.sh
ubuntu-mainline-kernel-installer.sh: command not found
patrick@Lappy:~$ sudo LANG=C ubuntu-mainline-kernel-installer.sh
[sudo] password for patrick: 
sudo: ubuntu-mainline-kernel-installer.sh: command not found
patrick@Lappy:~$

My system:
Operating System: Kubuntu 20.04
KDE Plasma Version: 5.18.8
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
Kernel Version: 5.15.0-57-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-10510U CPU @ 1.80GHz
Memory: 15,3 GiB

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  • Try uninstalling and installing it again.
    – Joepie Es
    Commented Jan 13, 2023 at 21:43
  • Doesnt work. It remains the same.
    – HomerSimpson
    Commented Jan 13, 2023 at 21:50
  • I see you are using a non-English locale. This will sound like a stupid question, but have you tried switching your GUI language to English for the tool, then switched back afterwards? It's possible it's a localization issue that is due to the locale you're using, as well as a 'font' issue. It's impossible, however, to ID what 'font' is needed to display certain characters for different locales though.
    – Thomas Ward ♦
    Commented Jan 16, 2023 at 1:15

2 Answers 2

Reset to default
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start the Ubuntu Mainline Kernel Installer from the console prepending a switch to english like this:

LANG=C ubuntu-mainline-kernel-installer.sh
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  • I tried your suggestion. Please see my edited question.
    – HomerSimpson
    Commented Mar 27, 2023 at 19:46
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Consider this a suggestion, because I cannot test it.

I use aptik, a program developed by the same person that developed ukuu.

Mainline Kernel Installer is forked from ukuu.

I had the same font problem with aptik. To fix it, I installed the fonts-liberation2 package.

Consider giving that package a try. If it does not work, please comment, and I will delete this suggestion/answer.

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