FG+Linux+File choose/File manager possible issue

[rek2]

Hello everyone,

I'm new to Fantasy Grounds and currently setting up a Cyberpunk RED campaign.
I'm running into a reproducible crash:

Problem:
When I go to the “Images” tab and click the “Import” button, FG crashes immediately. This happens 100% of the time.

Environment:

OS: Arch GNU/Linux

Display protocol: Wayland

WM: Hyprland (tiling compositor, no full desktop environment)

FG version: latest, I update every day.

Important context:
I have lf (a terminal-based file manager) set as my default via xdg-mime. for context see https://github.com/gokcehan/lf
That setup actually works fine in many GUI apps (e.g., Firefox uses lf as my file picker without issue).
But I suspect FG crashes because it tries to launch lf as the file picker, which might not be supported in its GUI context — possibly leading to a segmentation fault or failure when spawning the file chooser.

Questions:

Is there a way to override the file picker used by Fantasy Grounds — for example, forcing it to use a native GTK/KDE file chooser like dolphin, nautilus, or gtk-file-chooser?

Does FG rely on xdg-desktop-portal, gvfs, or its own file dialog backend?

Is there any config file or launch argument where I can force a specific file picker to avoid the crash?

I’d be happy to run FG through strace or gdb and provide crash info if needed.
Thanks in advance!

[pindercarl]

Hello everyone,

I'm new to Fantasy Grounds and currently setting up a Cyberpunk RED campaign.
I'm running into a reproducible crash:

Problem:
When I go to the “Images” tab and click the “Import” button, FG crashes immediately. This happens 100% of the time.

Environment:

OS: Arch GNU/Linux

Display protocol: Wayland

WM: Hyprland (tiling compositor, no full desktop environment)

FG version: latest, I update every day.

Important context:
I have lf (a terminal-based file manager) set as my default via xdg-mime. for context see https://github.com/gokcehan/lf
That setup actually works fine in many GUI apps (e.g., Firefox uses lf as my file picker without issue).
But I suspect FG crashes because it tries to launch lf as the file picker, which might not be supported in its GUI context — possibly leading to a segmentation fault or failure when spawning the file chooser.

Questions:

Is there a way to override the file picker used by Fantasy Grounds — for example, forcing it to use a native GTK/KDE file chooser like dolphin, nautilus, or gtk-file-chooser?

Does FG rely on xdg-desktop-portal, gvfs, or its own file dialog backend?

Is there any config file or launch argument where I can force a specific file picker to avoid the crash?

I’d be happy to run FG through strace or gdb and provide crash info if needed.
Thanks in advance!

This might help: https://fantasygroundsunity.atlassian.net/wiki/spaces/FGCP/pages/1997012993/Linux+Starting+FGU+with+Wayland+Instead+of+x11+Com positor

[nickabbey]

sorry for the necro, but it didn't seem to make sense to open a new thread for this comment.
The suggestion to skip wayland and render with x11 native backend fixed my issue.
I was getting a crash with the following logs whenever I clicked the import button to tray and add a character from an exported xml file.

normal startup stuff and then:


opyright 2025 Smiteworks USA, LLC
[9/29/2025 3:41:41 PM] RULESET: Core RPG ruleset (2025-09-09) for Fantasy Grounds
Copyright 2025 Smiteworks USA, LLC
[9/29/2025 3:41:41 PM] MEASURE: LOAD - PART 2 - 2.26252
Caught fatal signal - signo:11 code:128 errno:0 addr:(nil)
Obtained 20 stack frames.
#0 0x007fec31601b98 in getWindowFromPid
#1 0x007fec31601c7b in getUnityWindow
#2 0x007fec31601efd in GTKOpenPanel
#3 0x007fec31601e2a in DialogOpenFilePanelAsync
#4 0x00000040826de3 in (wrapper managed-to-native) Crosstales.FB.Wrapper.Linux.NativeMethods:DialogOp enFilePanelAsync (string,string,string,bool,Crosstales.FB.Wrapper.L inux.NativeMethods/AsyncCallback)
#5 0x00000040826abf in Crosstales.FB.Wrapper.FileBrowserLinux:OpenFilesAs ync (string,string,string,bool,Crosstales.FB.Extension Filter[],System.Action`1<string[]>)
#6 0x0000004082654a in Crosstales.FB.FileBrowser:OpenFilesAsync (string,string,string,bool,Crosstales.FB.Extension Filter[])
#7 0x00000040822c5f in FEJEDEPIKDL:ADIHDHOJKEF (int,bool,string,System.Collections.Generic.List`1<System.ValueTuple`2<string, string>>)
#8 0x0000004082255b in LLEJHGCHBDD:DDDBLEEFJPF (intptr)
#9 0x000000406c6e87 in (wrapper native-to-managed) LLEJHGCHBDD:DDDBLEEFJPF (intptr)
#10 0x000000406b4fae in (wrapper managed-to-native) KeraLua51.NativeMethods:lua_pcall (intptr,int,int,int)
#11 0x000000406b4f23 in KeraLua51.Lua:PCall (int,int,int)
#12 0x000000406b4e6f in JEAPNOMMHMC:IFOEMGIHOML (int,int,bool)
#13 0x00000040758117 in BGKNOHPJLAI:BCGDIPADBCG (int,int)
#14 0x00000040809a47 in DEKMCGAGBCB:MGFPBANEPEJ ()
#15 0x000000408097df in DEKMCGAGBCB:ReceiveClickUp (int,UnityEngine.Vector2Int modreq(System.Runtime.InteropServices.InAttribute)&)
#16 0x00000040809615 in NNODHJOADMC:KIFJPOAEFGA (int)
#17 0x000000407fa363 in NNODHJOADMC:FDENFOEBLBE ()
#18 0x000000407f9cbf in FG.FGDesktop:BBGABPMFMKH ()
#19 0x000000406ac363 in FG.FGDesktop:Update ()
#20 0x0000004044dc15 in (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)


starting with
GDK_BACKEND=x11 ./.smiteworks/fantasygrounds/FantasyGrounds.x86_64
allowed me to import the files.

for whatever it's worth, I'm on nobara (nvidia version) and kde plasma.