It seems to affect all third party apps with screen capture abilities. First I start with my findings with the ‘Gnome’ Screenshot app and then with Flameshot.
Screenshot
I’ve always used the Screenshot app that came with Fedora. I don’t remember ever installing it.
I tried to take a screenshot by opening the app.
Selection
If I select Selection as capture area and click on Take Screenshot, the app window closes and then nothing happens.
Meanwhile in the journal:
mei 30 14:15:18 systemd[7166]: Started dbus-:1.1-org.gnome.Screenshot@0.service.
mei 30 14:15:38 gnome-screenshot[16809]: Unable to select area using GNOME Shell's builtin screenshot interface, resorting to fallback X11.
If I start the app again, the selection crosshair is only visible in the app window. If I click outside the app window nothing happens. If I click in the app window, then a dialog window appears where to save the screenshot. However, the screenshots are blank (solid black or solid white) and no bigger than the app window size.
The journal when I click to try to select a capture area:
mei 30 14:36:58 gnome-screenshot[16809]: Unable to use GNOME Shell's builtin screenshot interface, resorting to fallback X11.
mei 30 14:36:59 audit: BPF prog-id=110 op=UNLOAD
mei 30 14:36:59 audit: BPF prog-id=109 op=UNLOAD
mei 30 14:36:59 audit: BPF prog-id=111 op=LOAD
mei 30 14:36:59 audit: BPF prog-id=112 op=LOAD
mei 30 14:36:59 audit: BPF prog-id=113 op=LOAD
Window
When I select Window as capture area and then click Take Screenshot, the app window disappears and the journal throws out a massive coredump:
mei 30 14:49:40 gnome-screenshot[16809]: Unable to use GNOME Shell's builtin screenshot interface, resorting to fallback X11.
mei 30 14:49:40 audit[16809]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 pid=16809 comm="gnome-screensho" exe="/usr/bin/gnome-screenshot" sig=11 res=1
mei 30 14:49:40 kernel: show_signal_msg: 18 callbacks suppressed
mei 30 14:49:40 gnome-screenshot[16809]: gdk_x11_window_get_xid: assertion 'GDK_IS_X11_WINDOW (window)' failed
mei 30 14:49:40 kernel: gnome-screensho[16809]: segfault at 558f6d1c1d68 ip 0000558f6d1c1d68 sp 00007fff50011138 error 15 likely on CPU 5 (core 1, socket 0)
mei 30 14:49:40 systemd-coredump[21840]: Process 16809 (gnome-screensho) of user 1000 terminated abnormally with signal 11/SEGV, processing...
mei 30 14:49:40 kernel: Code: 00 00 00 00 00 00 00 00 00 00 71 00 00 00 00 00 00 00 68 1d 1c 6d 8f 55 00 00 70 9e f2 60 9c 7f 00 00 f0 d6 f2 60 9c 7f 00 00 <60> 64 c6 60 9c 7f 00 00 70 64 c6 60 9c 7f 00 00 d0 64 c6 60 9c 7f
mei 30 14:49:40 systemd[1]: Created slice system-systemd\x2dcoredump.slice - Slice /system/systemd-coredump.
mei 30 14:49:40 audit: BPF prog-id=114 op=LOAD
mei 30 14:49:40 audit: BPF prog-id=115 op=LOAD
mei 30 14:49:40 audit: BPF prog-id=116 op=LOAD
mei 30 14:49:40 systemd[1]: Started systemd-coredump@0-1-21840_31177-0.service - Process Core Dump (PID 21840/UID 0).
mei 30 14:49:40 audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-coredump@0-1-21840_31177-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
mei 30 14:49:40 abrt-dump-journal-core[1455]: Failed to obtain all required information from journald
mei 30 14:49:40 systemd-coredump[21841]: [🡕] Process 16809 (gnome-screensho) of user 1000 dumped core.
Module /usr/bin/gnome-screenshot from rpm gnome-screenshot-41.0-12.fc43.x86_64
Module libgioremote-volume-monitor.so from rpm gvfs-1.58.4-1.fc43.x86_64
Module libpk-gtk-module.so from rpm PackageKit-1.3.4-3.fc43.x86_64
Module libogg.so.0 from rpm libogg-1.3.6-2.fc43.x86_64
Module libvorbis.so.0 from rpm libvorbis-1.3.7-13.fc43.x86_64
Module libltdl.so.7 from rpm libtool-2.5.4-8.fc43.x86_64
Module libtdb.so.1 from rpm libtdb-1.4.14-3.fc43.x86_64
Module libvorbisfile.so.3 from rpm libvorbis-1.3.7-13.fc43.x86_64
Module libgthread-2.0.so.0 from rpm glib2-2.86.5-1.fc43.x86_64
Module libnss_systemd.so.2 from rpm systemd-258.7-1.fc43.x86_64
Module libnss_sss.so.2 from rpm sssd-2.12.0-1.fc43.x86_64
Module libgvfscommon.so from rpm gvfs-1.58.4-1.fc43.x86_64
Module libgvfsdbus.so from rpm gvfs-1.58.4-1.fc43.x86_64
Module libdconfsettings.so from rpm dconf-0.49.0-1.fc43.x86_64
Module libcap.so.2 from rpm libcap-2.76-4.fc43.x86_64
Module libbrotlicommon.so.1 from rpm brotli-1.2.0-1.fc43.x86_64
Module libsystemd.so.0 from rpm systemd-258.7-1.fc43.x86_64
Module liblzma.so.5 from rpm xz-5.8.1-4.fc43.x86_64
Module libdatrie.so.1 from rpm libdatrie-0.2.13-12.fc43.x86_64
Module libblkid.so.1 from rpm util-linux-2.41.4-7.fc43.x86_64
Module libseccomp.so.2 from rpm libseccomp-2.6.0-2.fc43.x86_64
Module liblcms2.so.2 from rpm lcms2-2.16-6.fc43.x86_64
Module libbrotlidec.so.1 from rpm brotli-1.2.0-1.fc43.x86_64
Module libbz2.so.1 from rpm bzip2-1.0.8-21.fc43.x86_64
Module libsqlite3.so.0 from rpm sqlite-3.50.2-2.fc43.x86_64
Module libjson-glib-1.0.so.0 from rpm json-glib-1.10.8-4.fc43.x86_64
Module libdbus-1.so.3 from rpm dbus-1.16.0-4.fc43.x86_64
Module libatspi.so.0 from rpm at-spi2-core-2.58.5-1.fc43.x86_64
Module libxml2.so.2 from rpm libxml2-2.12.10-5.fc43.x86_64
Module libgraphite2.so.3 from rpm graphite2-1.3.14-19.fc43.x86_64
Module libthai.so.0 from rpm libthai-0.1.29-11.fc43.x86_64
Module libXau.so.6 from rpm libXau-1.0.12-3.fc43.x86_64
Module libffi.so.8 from rpm libffi-3.5.2-1.fc43.x86_64
Module libselinux.so.1 from rpm libselinux-3.9-5.fc43.x86_64
Module libmount.so.1 from rpm util-linux-2.41.4-7.fc43.x86_64
Module libglycin-2.so.0 from rpm glycin-2.0.8-1.fc43.x86_64
Module libpixman-1.so.0 from rpm pixman-0.46.2-2.fc43.x86_64
Module libxcb-shm.so.0 from rpm libxcb-1.17.0-6.fc43.x86_64
Module libxcb-render.so.0 from rpm libxcb-1.17.0-6.fc43.x86_64
Module libXrender.so.1 from rpm libXrender-0.9.12-3.fc43.x86_64
Module libfreetype.so.6 from rpm freetype-2.13.3-3.fc43.x86_64
Module libpng16.so.16 from rpm libpng-1.6.56-1.fc43.x86_64
Module libz.so.1 from rpm zlib-ng-2.3.3-2.fc43.x86_64
Module libXinerama.so.1 from rpm libXinerama-1.1.5-9.fc43.x86_64
Module libXrandr.so.2 from rpm libXrandr-1.5.4-6.fc43.x86_64
Module libXcomposite.so.1 from rpm libXcomposite-0.4.6-6.fc43.x86_64
Module libXdamage.so.1 from rpm libXdamage-1.1.6-6.fc43.x86_64
Module libXcursor.so.1 from rpm libXcursor-1.2.3-3.fc43.x86_64
Module libwayland-egl.so.1 from rpm wayland-1.24.0-1.fc43.x86_64
Module libwayland-cursor.so.0 from rpm wayland-1.24.0-1.fc43.x86_64
Module libxkbcommon.so.0 from rpm libxkbcommon-1.11.0-1.fc43.x86_64
Module libXfixes.so.3 from rpm libXfixes-6.0.1-6.fc43.x86_64
Module libwayland-client.so.0 from rpm wayland-1.24.0-1.fc43.x86_64
Module libtinysparql-3.0.so.0 from rpm tinysparql-3.10.1-5.fc43.x86_64
Module libcloudproviders.so.0 from rpm libcloudproviders-0.3.6-2.fc43.x86_64
Module libatk-bridge-2.0.so.0 from rpm at-spi2-core-2.58.5-1.fc43.x86_64
Module libXi.so.6 from rpm libXi-1.8.2-3.fc43.x86_64
Module libepoxy.so.0 from rpm libepoxy-1.5.10-11.fc43.x86_64
Module libatk-1.0.so.0 from rpm at-spi2-core-2.58.5-1.fc43.x86_64
Module libcairo-gobject.so.2 from rpm cairo-1.18.4-2.fc43.x86_64
Module libfribidi.so.0 from rpm fribidi-1.0.16-3.fc43.x86_64
Module libfontconfig.so.1 from rpm fontconfig-2.17.0-3.fc43.x86_64
Module libpangoft2-1.0.so.0 from rpm pango-1.57.1-1.fc43.x86_64
Module libharfbuzz.so.0 from rpm harfbuzz-11.5.1-2.fc43.x86_64
Module libpango-1.0.so.0 from rpm pango-1.57.1-1.fc43.x86_64
Module libpangocairo-1.0.so.0 from rpm pango-1.57.1-1.fc43.x86_64
Module libgmodule-2.0.so.0 from rpm glib2-2.86.5-1.fc43.x86_64
Module libpcre2-8.so.0 from rpm pcre2-10.47-1.fc43.x86_64
Module libxcb.so.1 from rpm libxcb-1.17.0-6.fc43.x86_64
Module libhandy-1.so.0 from rpm libhandy-1.8.3-9.fc43.x86_64
Module libgobject-2.0.so.0 from rpm glib2-2.86.5-1.fc43.x86_64
Module libgio-2.0.so.0 from rpm glib2-2.86.5-1.fc43.x86_64
Module libgdk_pixbuf-2.0.so.0 from rpm gdk-pixbuf2-2.44.6^really2.44.4-1.fc43.x86_64
Module libcairo.so.2 from rpm cairo-1.18.4-2.fc43.x86_64
Module libgdk-3.so.0 from rpm gtk3-3.24.52-1.fc43.x86_64
Module libgtk-3.so.0 from rpm gtk3-3.24.52-1.fc43.x86_64
Module libglib-2.0.so.0 from rpm glib2-2.86.5-1.fc43.x86_64
Module libXext.so.6 from rpm libXext-1.3.6-4.fc43.x86_64
Module libX11.so.6 from rpm libX11-1.8.13-1.fc43.x86_64
Stack trace of thread 16809:
#0 0x0000558f6d1c1d68 n/a (n/a + 0x0)
#1 0x0000558f63d8bce8 screenshot_backend_x11_get_pixbuf (/usr/bin/gnome-screenshot + 0x4ce8)
#2 0x0000558f63d8e4c4 take_screenshot_timeout (/usr/bin/gnome-screenshot + 0x74c4)
#3 0x00007f9c6186350b g_timeout_dispatch (libglib-2.0.so.0 + 0x4750b)
#4 0x00007f9c6185d363 g_main_context_dispatch_unlocked.lto_priv.0 (libglib-2.0.so.0 + 0x41363)
#5 0x00007f9c618662b8 g_main_context_iterate_unlocked.isra.0 (libglib-2.0.so.0 + 0x4a2b8)
#6 0x00007f9c61866463 g_main_context_iteration (libglib-2.0.so.0 + 0x4a463)
#7 0x00007f9c60d701dd g_application_run (libgio-2.0.so.0 + 0xaf1dd)
#8 0x0000558f63d89aa3 main (/usr/bin/gnome-screenshot + 0x2aa3)
#9 0x00007f9c6099c5b5 __libc_start_call_main (libc.so.6 + 0x35b5)
#10 0x00007f9c6099c668 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x3668)
#11 0x0000558f63d89b35 _start (/usr/bin/gnome-screenshot + 0x2b35)
Stack trace of thread 16815:
#0 0x00007f9c60a13902 __syscall_cancel_arch (libc.so.6 + 0x7a902)
#1 0x00007f9c60a07b9c __internal_syscall_cancel (libc.so.6 + 0x6eb9c)
#2 0x00007f9c60a07be4 __syscall_cancel (libc.so.6 + 0x6ebe4)
#3 0x00007f9c60a81686 ppoll (libc.so.6 + 0xe8686)
#4 0x00007f9c618663a0 g_main_context_iterate_unlocked.isra.0 (libglib-2.0.so.0 + 0x4a3a0)
#5 0x00007f9c61866463 g_main_context_iteration (libglib-2.0.so.0 + 0x4a463)
#6 0x00007f9c61ad9e4d dconf_gdbus_worker_thread (libdconfsettings.so + 0x4e4d)
#7 0x00007f9c61890752 g_thread_proxy (libglib-2.0.so.0 + 0x74752)
#8 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#9 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
Stack trace of thread 16812:
#0 0x00007f9c60a13902 __syscall_cancel_arch (libc.so.6 + 0x7a902)
#1 0x00007f9c60a07b9c __internal_syscall_cancel (libc.so.6 + 0x6eb9c)
#2 0x00007f9c60a07be4 __syscall_cancel (libc.so.6 + 0x6ebe4)
#3 0x00007f9c60a81686 ppoll (libc.so.6 + 0xe8686)
#4 0x00007f9c618663a0 g_main_context_iterate_unlocked.isra.0 (libglib-2.0.so.0 + 0x4a3a0)
#5 0x00007f9c61866463 g_main_context_iteration (libglib-2.0.so.0 + 0x4a463)
#6 0x00007f9c618664b1 glib_worker_main (libglib-2.0.so.0 + 0x4a4b1)
#7 0x00007f9c61890752 g_thread_proxy (libglib-2.0.so.0 + 0x74752)
#8 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#9 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
Stack trace of thread 16817:
#0 0x00007f9c60a8c30d syscall (libc.so.6 + 0xf330d)
#1 0x00007f9c5fc10ec6 _ZN3std3sys4sync5mutex5futex5Mutex14lock_contended17h2578d8832d98bb72E (libglycin-2.so.0 + 0x10ec6)
#2 0x00007f9c5fd3e46a _ZN3std3sys9backtrace28__rust_begin_short_backtrace17h0f8408cc3f49f0f9E (libglycin-2.so.0 + 0x13e46a)
#3 0x00007f9c5fd3e04c _ZN4core3ops8function6FnOnce40call_once$u7b$$u7b$vtable.shim$u7d$$u7d$17hf37e005b6c510335E (libglycin-2.so.0 + 0x13e04c)
#4 0x00007f9c5fe719f0 _ZN3std3sys6thread4unix6Thread3new12thread_start17hf83b65292bfddc02E (libglycin-2.so.0 + 0x2719f0)
#5 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#6 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
Stack trace of thread 17026:
#0 0x00007f9c60a8c30d syscall (libc.so.6 + 0xf330d)
#1 0x00007f9c6189136b g_cond_wait (libglib-2.0.so.0 + 0x7536b)
#2 0x00007f9c6182620c g_async_queue_pop_intern_unlocked (libglib-2.0.so.0 + 0xa20c)
#3 0x00007f9c6182627c g_async_queue_pop (libglib-2.0.so.0 + 0xa27c)
#4 0x00007f9c606f76c9 fc_thread_func (libpangoft2-1.0.so.0 + 0x46c9)
#5 0x00007f9c61890752 g_thread_proxy (libglib-2.0.so.0 + 0x74752)
#6 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#7 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
Stack trace of thread 17675:
#0 0x00007f9c60a13902 __syscall_cancel_arch (libc.so.6 + 0x7a902)
#1 0x00007f9c60a07b9c __internal_syscall_cancel (libc.so.6 + 0x6eb9c)
#2 0x00007f9c60a07be4 __syscall_cancel (libc.so.6 + 0x6ebe4)
#3 0x00007f9c60a77b0f wait4 (libc.so.6 + 0xdeb0f)
#4 0x00007f9c5fe7762b _ZN3std3sys7process4unix4unix7Process4wait17ha93bdc6325964c43E (libglycin-2.so.0 + 0x27762b)
#5 0x00007f9c5fc6ab7a _ZN3std3sys9backtrace28__rust_begin_short_backtrace17h6778dd16316a07a7E (libglycin-2.so.0 + 0x6ab7a)
#6 0x00007f9c5fc7355f _ZN4core3ops8function6FnOnce40call_once$u7b$$u7b$vtable.shim$u7d$$u7d$17h6844a6ea1d78e190E (libglycin-2.so.0 + 0x7355f)
#7 0x00007f9c5fe719f0 _ZN3std3sys6thread4unix6Thread3new12thread_start17hf83b65292bfddc02E (libglycin-2.so.0 + 0x2719f0)
#8 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#9 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
Stack trace of thread 16811:
#0 0x00007f9c60a8c30d syscall (libc.so.6 + 0xf330d)
#1 0x00007f9c6189136b g_cond_wait (libglib-2.0.so.0 + 0x7536b)
#2 0x00007f9c6182620c g_async_queue_pop_intern_unlocked (libglib-2.0.so.0 + 0xa20c)
#3 0x00007f9c61894124 g_thread_pool_spawn_thread (libglib-2.0.so.0 + 0x78124)
#4 0x00007f9c61890752 g_thread_proxy (libglib-2.0.so.0 + 0x74752)
#5 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#6 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
Stack trace of thread 16813:
#0 0x00007f9c60a13902 __syscall_cancel_arch (libc.so.6 + 0x7a902)
#1 0x00007f9c60a07b9c __internal_syscall_cancel (libc.so.6 + 0x6eb9c)
#2 0x00007f9c60a07be4 __syscall_cancel (libc.so.6 + 0x6ebe4)
#3 0x00007f9c60a81686 ppoll (libc.so.6 + 0xe8686)
#4 0x00007f9c618663a0 g_main_context_iterate_unlocked.isra.0 (libglib-2.0.so.0 + 0x4a3a0)
#5 0x00007f9c6186655f g_main_loop_run (libglib-2.0.so.0 + 0x4a55f)
#6 0x00007f9c60da9f92 gdbus_shared_thread_func.lto_priv.0 (libgio-2.0.so.0 + 0xe8f92)
#7 0x00007f9c61890752 g_thread_proxy (libglib-2.0.so.0 + 0x74752)
#8 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#9 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
Stack trace of thread 16816:
#0 0x00007f9c5fd3eb53 _ZN8async_io7reactor11ReactorLock5react17h7f3be23b904b6eb4E (libglycin-2.so.0 + 0x13eb53)
#1 0x00007f9c5fd37c8d _ZN21async_global_executor9threading16thread_main_loop17hc183cd7da5ecf256E (libglycin-2.so.0 + 0x137c8d)
#2 0x00007f9c5fd36189 _ZN3std3sys9backtrace28__rust_begin_short_backtrace17h55fe912b5053ac4cE (libglycin-2.so.0 + 0x136189)
#3 0x00007f9c5fd36091 _ZN4core3ops8function6FnOnce40call_once$u7b$$u7b$vtable.shim$u7d$$u7d$17hbe883a977f44f7caE (libglycin-2.so.0 + 0x136091)
#4 0x00007f9c5fe719f0 _ZN3std3sys6thread4unix6Thread3new12thread_start17hf83b65292bfddc02E (libglycin-2.so.0 + 0x2719f0)
#5 0x00007f9c60a0b3c4 start_thread (libc.so.6 + 0x723c4)
#6 0x00007f9c60a8e56c __clone3 (libc.so.6 + 0xf556c)
ELF object binary architecture: AMD x86-64
mei 30 14:49:40 systemd[1]: systemd-coredump@0-1-21840_31177-0.service: Deactivated successfully.
mei 30 14:49:40 audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-coredump@0-1-21840_31177-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
mei 30 14:49:40 systemd[1]: systemd-coredump@0-1-21840_31177-0.service: Consumed 432ms CPU time, 114.2M memory peak.
mei 30 14:49:40 systemd[7166]: dbus-:1.1-org.gnome.Screenshot@0.service: Main process exited, code=dumped, status=11/SEGV
mei 30 14:49:40 systemd[7166]: dbus-:1.1-org.gnome.Screenshot@0.service: Failed with result 'core-dump'.
mei 30 14:49:40 systemd[7166]: dbus-:1.1-org.gnome.Screenshot@0.service: Consumed 7.550s CPU time, 31.6M memory peak.
mei 30 14:49:40 audit: BPF prog-id=116 op=UNLOAD
mei 30 14:49:40 audit: BPF prog-id=115 op=UNLOAD
mei 30 14:49:40 audit: BPF prog-id=114 op=UNLOAD
mei 30 14:49:48 abrt-server[21857]: Deleting problem directory ccpp-2026-05-30-14:49:41.151143-16809 (dup of ccpp-2026-05-29-19:29:49.729830-40613)
mei 30 14:49:48 abrt-applet[7738]: g_app_info_should_show: assertion 'G_IS_APP_INFO (appinfo)' failed
mei 30 14:49:48 abrt-notification[21908]: [🡕] Process 40613 (gnome-screenshot) crashed in ??()
mei 30 14:49:49 abrt-applet[7738]: g_app_info_should_show: assertion 'G_IS_APP_INFO (appinfo)' failed
Screen
Error message after clicking on Take Screenshot while having Screen selected as capture area:
The journal while trying to capture the whole screen:
mei 30 15:02:25 systemd[7166]: Started dbus-:1.1-org.gnome.Screenshot@1.service.
mei 30 15:02:54 gnome-screenshot[26492]: Unable to use GNOME Shell's builtin screenshot interface, resorting to fallback X11.
mei 30 15:02:54 gnome-screenshot[26492]: gdk_pixbuf_get_from_surface: assertion 'width > 0 && height > 0' failed
mei 30 15:02:54 gnome-screenshot[26492]: *** BUG ***
mei 30 15:02:54 gnome-screenshot[26492]: In pixman_region32_init_rect: Invalid rectangle passed
mei 30 15:02:54 gnome-screenshot[26492]: Set a breakpoint on '_pixman_log_error' to debug
mei 30 15:02:54 gnome-screenshot[26492]: gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
mei 30 15:02:54 gnome-screenshot[26492]: gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
mei 30 15:02:54 gnome-screenshot[26492]: gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
mei 30 15:02:54 gnome-screenshot[26492]: gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
mei 30 15:02:54 gnome-screenshot[26492]: gtk_window_resize: assertion 'width > 0' failed
mei 30 15:02:54 gnome-screenshot[26492]: Unable to capture a screenshot of any window
I can live without this app and use the new built-in screenshot app for Gnome, but Flameshot is also unable to make a screen capture.
Flameshot
When I try to take a screenshot, then I see two sames messages at the top of my desktop:
Flameshot error
Unable to capture screen
And the journal:
mei 30 16:02:22 systemd[7198]: Started app-gnome-org.flameshot.Flameshot-10661.scope - Application launched by gnome-shell.
mei 30 16:02:23 xdg-desktop-portal-gnome[7954]: Failed to associate portal window with parent window
mei 30 16:02:23 /usr/libexec/xdg-desktop-portal[7863]: Failed to show access dialog: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Only the focused app is allowed to show a system access dialog
mei 30 16:02:23 org.flameshot.Flameshot.desktop[10661]: flameshot: error: Unable to capture screen
mei 30 16:02:23 org.flameshot.Flameshot.desktop[10661]: flameshot: error: Unable to capture screen
mei 30 16:02:23 flameshot[10661]: Unable to get current screen, starting to use primary screen. It may be a cause of logical error and working with a wrong screen.
mei 30 16:02:23 flameshot[10661]: QLayout: Attempting to add QLayout "" to SidePanelWidget "", which already has a layout
mei 30 16:02:23 flameshot[10661]: Unable to get current screen, starting to use primary screen. It may be a cause of logical error and working with a wrong screen.
mei 30 16:02:24 flameshot[10661]: Unable to get current screen, starting to use primary screen. It may be a cause of logical error and working with a wrong screen.
mei 30 16:02:24 gnome-shell[7461]: meta_window_set_stack_position_no_sync: assertion 'window->stack_position >= 0' failed
mei 30 16:02:24 org.flameshot.Flameshot.desktop[10661]: flameshot: info: Screenshot aborted.
mei 30 16:02:24 flameshot[10661]: QThreadStorage: entry 2 destroyed before end of thread 0x55d42817ad90
mei 30 16:02:24 flameshot[10661]: QThreadStorage: entry 1 destroyed before end of thread 0x55d42817ad90
Conclusion
I tried all the basic stuff.
I removed and installed with the Software app, both rpm and flatpak.
I tried to install through dnf.
No difference in behaviour.
What I did find was that something with Gnome might have changed since Fedora 43. It seems that Gnome 49 added some restrictions what apps are allowed to do.
In a thread[1] I’ve found this explanation which is the same or similar to what I have in Gnome.
Mar 14 18:55:18 johnny5 xdg-desktop-portal-gnome[427758]: Failed to associate portal window with parent window
Mar 14 18:55:18 johnny5 xdg-desktop-portal[427783]: Failed to show access dialog: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied:
GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Only the focused app is allowed to show a system access dialog
This repeats on every attempt. The flow is:
1. Flameshot calls the Screenshot portal
2. The portal tries to show an access/permission dialog
3. GNOME blocks the dialog because flameshot isn't the focused window
4. Flameshot gets no screenshot data back and reports "Unable to capture screen"
Maybe I should switch over from Gnome to another desktop?
Or is there a way to apply a similar fix in Fedora?