Blank GUI on launch | Fedora 42

[ruisdiogo]

Hello all, I'm trying to run this on Fedora 42. Followed the installation instructions with no errors, but then got this when launching the app:

Any suggestions on how to solve it? Thanks!

[genderneutralnoun]

Having this issue as well. The only thing I can think of is that I'm failing to figure out how to install fuse2 - possibly fedora phased out fuse2 in favor of fuse3. I have just fuse installed, but when I do sudo dnf list | grep fuse there isn't anything named fuse2, only stuff like fuse3-devel and the like.

[tobolikd]

Same issue on Fedora 42

./LibreScore.AppImage 

(librescore:71411): Gtk-WARNING **: 16:46:10.301: Error loading icon from file '/tmp/.mount_LibreSj4SQCa/data/flutter_assets/assets/librescore-square.svg':
	Couldn’t recognize the image file format for file “/tmp/.mount_LibreSj4SQCa/data/flutter_assets/assets/librescore-square.svg”

** (librescore:71411): WARNING **: 16:46:10.387: Failed to start Flutter renderer: No GL implementation is available
Gtk-Message: 16:46:10.393: Failed to load module "colorreload-gtk-module"
Gtk-Message: 16:46:10.393: Failed to load module "window-decorations-gtk-module"
Gtk-Message: 16:46:10.393: Failed to load module "appmenu-gtk-module"

There is probably problem with wayland, this is temporary workaround that worked for me:

env GDK_BACKEND=x11 ./LibreScore.AppImage

[realSZ27]

Unfortunately the above solution didn't work for me (on Fedora 43). However launching it in an Ubuntu (24.04) distrobox did without the env var. Interestingly an arch distrobox launched, but only with the env var.
Note that I installed fuse2 beforehand on both.

[Itzbenz]

Environment

• OS: Fedora Linux 43 (Workstation Edition)
• Kernel: 6.15+
• DE: GNOME 49
• Display Server: Wayland
• GPU 1 (Integrated): Intel(R) UHD Graphics (TGL GT1) | Mesa 25.2.7
• GPU 2 (Discrete): NVIDIA GeForce RTX 3050 Laptop GPU | Driver 580.105.08
• VA-API: Intel iHD driver 25.3.4
• fuse3-3.16.2-5.fc42.x86_64
• Librescore v6.0.21

---

Reproduction Steps

1. Download LibreScore.AppImage v6.0.21

2. Run chmod a+x ./LibreScore.AppImage && ./LibreScore.AppImage --install

3. Standard execution:

librescore

Result: Failed to start Flutter renderer: No GL implementation is available

2. Force X11 backend:

GDK_BACKEND=x11 librescore

Result: Failed to start Flutter renderer: No available configurations for the given pixel format

3. Force EGL platform:

EGL_PLATFORM=x11 librescore

Result: /tmp/.mount_libresF0whvk/AppRun: line 4: 206006 Segmentation fault (core dumped) LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${APPDIR}/lib" "${APPDIR}/librescore" "$@"

---

Diagnostic Logs

Application Error Output:

user@host:~/Downloads$ librescore 

(librescore:205929): Gtk-WARNING **: 09:20:08.795: Error loading icon from file '/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg':
	Couldn’t recognize the image file format for file “/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg”

** (librescore:205929): WARNING **: 09:20:08.849: Failed to start Flutter renderer: No GL implementation is available
Gtk-Message: 09:20:08.854: Failed to load module "canberra-gtk-module"
Gtk-Message: 09:20:08.854: Failed to load module "pk-gtk-module"
user@host:~/Downloads$ EGL_PLATFORM=x11 librescore

(librescore:206006): Gtk-WARNING **: 09:20:37.466: Error loading icon from file '/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg':
	Couldn’t recognize the image file format for file “/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg”
/tmp/.mount_libresXXXXXX/AppRun: line 4: 206006 Segmentation fault (core dumped) LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${APPDIR}/lib" "${APPDIR}/librescore" "$@"
user@host:~/Downloads$ GDK_BACKEND=x11 librescore
Gtk-Message: 09:20:53.364: Failed to load module "canberra-gtk-module"
Gtk-Message: 09:20:53.364: Failed to load module "pk-gtk-module"
Gtk-Message: 09:20:53.365: Failed to load module "canberra-gtk-module"
Gtk-Message: 09:20:53.365: Failed to load module "pk-gtk-module"

(librescore:206105): Gtk-WARNING **: 09:20:53.374: Error loading icon from file '/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg':
	Couldn’t recognize the image file format for file “/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg”

** (librescore:206105): WARNING **: 09:20:53.443: Failed to start Flutter renderer: No available configurations for the given pixel format
user@host:~/Downloads$ librescore

(librescore:206156): Gtk-WARNING **: 09:21:05.053: Error loading icon from file '/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg':
	Couldn’t recognize the image file format for file “/tmp/.mount_libresXXXXXX/data/flutter_assets/assets/librescore-square.svg”

** (librescore:206156): WARNING **: 09:21:05.108: Failed to start Flutter renderer: No GL implementation is available
Gtk-Message: 09:21:05.114: Failed to load module "canberra-gtk-module"
Gtk-Message: 09:21:05.114: Failed to load module "pk-gtk-module"

** (librescore:206156): WARNING **: 09:21:05.319: Unable to retrieve framework response: No engine to send to

** (librescore:206156): WARNING **: 09:21:05.499: Unable to retrieve framework response: No engine to send to
^C

System EGL Report (eglinfo -B):

Wayland platform:
EGL vendor string: Mesa Project
EGL client APIs: OpenGL OpenGL_ES 
OpenGL core profile renderer: Mesa Intel(R) UHD Graphics (TGL GT1)
OpenGL core profile version: 4.6 (Core Profile) Mesa 25.2.7

Device #1:
libEGL warning: pci id for fd 25: 10de:25a2, driver (null)
libEGL warning: egl: failed to create dri2 screen
eglinfo: eglInitialize failed

System GL Report (glxinfo -B):

name of display: :0
display: :0  screen: 0
direct rendering: Yes
Device: Mesa Intel(R) UHD Graphics (TGL GT1) (0x9a68)
Version: 25.2.7
Accelerated: yes
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) UHD Graphics (TGL GT1)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 25.2.7

VA-API Report (vainfo):

libva info: VA-API version 1.22.0
libva info: Trying to open /usr/lib64/dri-nonfree/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_22
libva info: va_openDriver() returns 0
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 25.3.4 ()

Currently I don't found any workaround

[bugreport1234]

I found a solution. It appears the problem is that the bundled libraries inside the AppImage are incompatible. The AppImage tries to use the bundled ones if they are not older than the system libraries, but there seems to be an additional factor that makes the bundled ones incompatible even if the GLIBC version matches.

The AppImage needs to be updated with compatible libraries.

As a workaround, force the librescore binary to use system libraries:

# Extract the AppImage:
./LibreScore.appimage --appimage-extract
# Go to extracted contents
cd squashfs-root
# Set AppImage environment variables:
export APPDIR=$(pwd)
# Run librescore using system libraries (taken from AppRun.sh)
# On my system I was able to simplify the below to
# cd /lib64 && LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${APPDIR}/lib" "${APPDIR}/librescore"
cd $(dirname $(ldd "${APPDIR}/librescore" | grep "ld-linux" | awk -F '=> ' 'NF>1{ sub(/ .*/,"",$NF); print $NF }' | head -n 1)) && LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${APPDIR}/lib" LD_PRELOAD="$(sudo ldconfig -p | grep "libstdc++\..*x86-64" | awk -F '=> ' 'NF>1{ sub(/ .*/,"",$NF); print $NF }' | head -n 1):$(sudo ldconfig -p | grep "libm\..*x86-64" | awk -F '=> ' 'NF>1{ sub(/ .*/,"",$NF); print $NF }' | head -n 1):$(sudo ldconfig -p | grep "libc\..*x86-64" | awk -F '=> ' 'NF>1{ sub(/ .*/,"",$NF); print $NF }' | head -n 1):$(sudo ldconfig -p | grep "librt\..*x86-64" | awk -F '=> ' 'NF>1{ sub(/ .*/,"",$NF); print $NF }' | head -n 1)" "${APPDIR}/librescore" "$@"