I eventually fixed my issue by installing package 'freetype2-demos'.
Your mileage may vary.
Ed
On Fri, 01 Sep 2017 18:12:33 -0500 Ed Peguillan III
<edward.j.peguilla...@ou.edu> wrote:
> Package: libqt5gui5
> Version: 5.9.1+dfsg-9
> Followup-For: Bug #853831
>
> Dear Maintainer,
>
> I think my problem is related. I initially thought the problem was with
> qjackctl specifically, but I realized that many qt5 applications would
> not start that depended on libqt5gui5, such as virtualbox.
>
> This error is given when starting qjackctl or virtualbox:
>
> $ virtualbox
> /usr/lib/virtualbox/VirtualBox: symbol lookup error:
> /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5: undefined symbol:
> FT_Property_Set
>
> $ qjackctl
> qjackctl: symbol lookup error:
> /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5: undefined symbol:
> FT_Property_Set
>
> See #873792 @
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=873792
>
> After I deleted the file I mentioned in that bug report, virtualbox and
> qjackctl started, until I rebooted my machine. Now it is back to the
> same error.
>
> I had infinality fonts installed from this git repo
> https://github.com/cmpitg/infinality-debian-package
> This may be the cause of the conflict. Unfortunately, I don't know
enough about this to figure out what is wrong. Uninstalling infinality
did not fix the problem.
>
> # apt install --reinstall libqt5gui5
>
> did not work.
>
> -- System Information:
> Debian Release: buster/sid
> APT prefers testing
> APT policy: (1000, 'testing'), (1000, 'stable'), (750, 'stable'),
(50, 'unstable'), (1, 'experimental')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
>
> Kernel: Linux 4.12.0-1-amd64 (SMP w/4 CPU cores)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> Init: systemd (via /run/systemd/system)
>
> Versions of packages libqt5gui5 depends on:
> ii fontconfig 2.12.3-0.2
> ii libc6 2.24-14
> ii libdrm2 2.4.82-1
> ii libegl1-mesa [libegl1-x11] 13.0.6-1+b2
> ii libfontconfig1 2.12.3-0.2
> ii libfreetype6 2.8-0.2
> ii libgbm1 13.0.6-1+b2
> ii libgcc1 1:7.2.0-1
> ii libgl1-mesa-glx [libgl1] 13.0.6-1+b2
> ii libglib2.0-0 2.53.4-3
