Same problem on Ubuntu 21.04. started gnome-font-viewer from terminal the window opens but is unresponsive. closing it I have the crash and a message: corrado@corrado-n8-hh-0101:~$ gnome-font-viewer
(gnome-font-viewer:4532): Gdk-ERROR **: 08:22:36.317: The program 'gnome-font-viewer' received an X Window System error. This probably reflects a bug in the program. The error was 'BadIDChoice (invalid resource ID chosen for this connection)'. (Details: serial 1502 error_code 14 request_code 130 (MIT-SHM) minor_code 5) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) Trace/breakpoint trap (core dumped) corrado@corrado-n8-hh-0101:~$ corrado@corrado-n8-hh-0101:~$ apt policy gnome-font-viewer gnome-font-viewer: Installed: 3.34.0-2 Candidate: 3.34.0-2 Version table: *** 3.34.0-2 500 500 http://archive.ubuntu.com/ubuntu hirsute/main amd64 Packages 100 /var/lib/dpkg/status corrado@corrado-n8-hh-0101:~$ inxi -SCGx System: Host: corrado-n8-hh-0101 Kernel: 5.8.0-25-generic x86_64 bits: 64 compiler: gcc v: 10.2.0 Desktop: GNOME 3.38.2 Distro: Ubuntu 21.04 (Hirsute Hippo) CPU: Info: Quad Core model: Intel Core i5-1035G1 bits: 64 type: MT MCP arch: Ice Lake rev: 5 L2 cache: 6 MiB flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19046 Speed: 813 MHz min/max: 400/1000 MHz Core speeds (MHz): 1: 813 2: 998 3: 989 4: 997 5: 966 6: 980 7: 954 8: 974 Graphics: Device-1: Intel Iris Plus Graphics G1 vendor: Dell driver: i915 v: kernel bus ID: 00:02.0 Device-2: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo bus ID: 1-6:3 Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz OpenGL: renderer: Mesa Intel UHD Graphics (ICL GT1) v: 4.6 Mesa 20.2.6 direct render: Yes corrado@corrado-n8-hh-0101:~$ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845362 Title: gnome-font-viewer crashed with signal 5 in _XEventsQueued() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-font-viewer/+bug/1845362/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs