segfault: gsettings antialiasing not found (GNOME, Arch Linux)

[Randy Josleyn]

Hi!

I've just downloaded the latest version of AntConc (4.2.4), and I'm getting a segfault when I start the program from the terminal:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
QSocketNotifier: Can only be used with threads started with QThread

(AntConc.sh:25498): GLib-GIO-ERROR **: 00:42:05.215: Settings schema 'org.gnome.settings-daemon.plugins.xsettings' does not contain a key named 'antialiasing'
/usr/bin/antconc: line 3: 25498 Trace/breakpoint trap   (core dumped) ./AntConc.sh

My system is up to date. I'm using GNOME with wayland. I used dconf-editor to search for antialiasing, which turned up one result: /org/gnome/desktop/interface/font-antialiasing.

Here are some things I tried in troubleshooting:

Running `QT_QPA_PLATFORM=wayland antconc` results in the same output.

I do have xorg-xwayland installed to allow X11 apps to run.

I guessed maybe I needed QT installed. Although GNOME is based on GTK, I do also have QT6 installed. I installed qt5-base and qt5-wayland and have the same message. Could there be some dependencies I need to install?

I tried the same things after downgrading to 3.5.9, with exactly the same results.

Do you have any suggestions for  troubleshooting? I recall I got this working a couple years ago on Arch Linux when using Sway as my window manager, but I don't recall if I had to do anything special.

Thanks for any help or suggestions you can provide!

Randy

[Randy Josleyn]

In my continuing troubleshooting, I installed sway and tried running antconc there. I get what seems to be the same fontconfig error that a few others have mentioned in previous threads:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.

Fontconfig warning: "/etc/fonts/fonts.conf", line 5: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/10-hinting-slight.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/10-sub-pixel-rgb.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/10-yes-antialias.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/11-lcdfilter-default.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/20-unhint-small-vera.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/30-metric-aliases.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/40-nonlatin.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/45-generic.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/45-latin.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/48-spacing.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/49-sansserif.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/51-local.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/60-generic.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/60-latin.conf", line 4: unknown element "description"
Fontconfig warning: "/etc/fonts/conf.d/65-nonlatin.conf", line 4: unknown element "description"
Fontconfig warning: FcPattern object weight does not accept value [40 210)
/usr/bin/antconc: line 3: 37820 Segmentation fault      (core dumped) ./AntConc.sh

In sway, I also tried antconc version 4.1.0 and 3.5.9, all with the same message. My fontconfig version is 2.14.2. Do I need a different version?

I'm willing to open sway in order to use antconc if I can get it working there.

[Frederik Elwert]

I actually have the same issue. At the moment, it’s not possible for me to launch AntConc under Ubuntu 22.04 (GNOME/wayland). If there’s something I can do to debug the issue, I’m happy to provide additional information.