Can't upgrade LyX on Focal Fossa

Paul A. Rubin parubin73 at
Wed Jul 22 17:56:53 UTC 2020

On 7/22/20 1:27 PM, Liviu Andronic wrote:
> On 7/22/20, Kees Zeelenberg <kzstatis at> wrote:
>> Thanks for compiling. Synaptic (on Linux Mint 20) aborts installing
>> LyX from the PPA with the messages:
>> Vereisten: libqtcore4 (>=4:4.8.0) but it is not installable
>> Vereisten: libqtgui4 (>=4:4.8.0) but it is not installable
>> Vereisten: libqt4-svg  but it is not installable
>> It seems Qt4 is no longer supplied on Focal.
> Yes, for Ubuntu Focal, Qt4 was removed from the Ubuntu repositories.
> To install LyX, you will also need to add the ppa:rock-core/qt4 PPA to
> your sources (
> I've now added a note on this on the PPA.
> Regards,
> Liviu
I just confirmed that, with the rock-core PPA added, LyX 2.3.5-1 now 
installs and runs on Mint 20 (and so presumably on Ubuntu Focal Fossa).

Thanks, Liviu!


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