What is this error about?

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1

thinh@localhost-live:~$ firefox
restorecon: SELinux: Could not get canonical path for /home/thinh/.mozilla/firefox//gmp-widevinecdm/ restore
con: No such file or directory.
libva info: VA-API version 1.22.0
libva info: Trying to open /usr/lib64/dri-nonfree/radeonsi_drv_video.so
libva info: Trying to open /usr/lib64/dri-freeworld/radeonsi_drv_video.so
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_1_22
libva info: va_openDriver() returns 0
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab80e0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab80e0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9e20 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab9e20 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9fc0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab9fc0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab8280 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab8280 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab80e0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab80e0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9e20 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab9e20 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9fc0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab9fc0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab8280 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab8280 as subsurface be
cause its parent is not mapped.

2

Hi Fart Boomer,

Welcome to the Forums. SOmeone will try and help you decipher and fix your issue.

Could you please put your error text as ‘preformatted text’ so it is easier to read. The icon for that is </> in the toolbar above the edit window.

Also please tell us more about your system. F41? Desktop? Regular or Silverblue? RPM or Flatpak? And what the contect is for your error - what you were trying to do.

Regards,
Mat

3 
thinh@localhost-live:~$ firefox
restorecon: SELinux: Could not get canonical path for /home/thinh/.mozilla/firefox//gmp-widevinecdm/ restore
con: No such file or directory.
libva info: VA-API version 1.22.0
libva info: Trying to open /usr/lib64/dri-nonfree/radeonsi_drv_video.so
libva info: Trying to open /usr/lib64/dri-freeworld/radeonsi_drv_video.so
libva info: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
libva info: Found init function __vaDriverInit_1_22
libva info: va_openDriver() returns 0
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Child 16735, MediaDecoderStateMachine #2] WARNING: Decoder=7f42c9bd4b00 Decode error: NS_ERROR_DOM_MEDIA_FATA
L_ERR (0x806e0005): file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/dom/media/MediaDecoderSta
teMachineBase.cpp:168
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab80e0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab80e0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9e20 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab9e20 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9fc0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab9fc0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab8280 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 02:41:11.926: Couldn’t map window 0x7fba9bab8280 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab80e0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab80e0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9e20 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab9e20 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab9fc0 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab9fc0 as subsurface be
cause its parent is not mapped.
[Parent 14920, Main Thread] WARNING: Couldn’t map window 0x7fba9bab8280 as subsurface because its parent is no
t mapped.: ‘glib warning’, file /builddir/build/BUILD/firefox-136.0.2-build/firefox-136.0.2/toolkit/xre/nsSigH
andlers.cpp:201

(org.mozilla.firefox:14920): Gdk-WARNING **: 17:09:35.505: Couldn’t map window 0x7fba9bab8280 as subsurface be
cause its parent is not mapped.

Hi, I’m new to this. This is my pc spec:
OS: Fedora Linux 42 (KDE Plasma Prerelease) x86_64
Host: MS-7E27 (1.0)
Kernel: Linux 6.14.0-0.rc7.56.fc42.x86_64
Uptime: 3 mins
Packages: 2674 (rpm), 10 (flatpak)
Shell: bash 5.2.37
Display (100140681): 1920x1080 @ 60 Hz in 21" [External]
DE: KDE Plasma 6.3.3
WM: KWin (Wayland)
WM Theme: Breeze
Theme: Breeze (Dark) [Qt], Breeze [GTK3]
Icons: breeze-dark [Qt], breeze-dark [GTK3/4]
Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK3/4]
Cursor: breeze (24px)
Terminal: konsole 24.12.3
CPU: AMD Ryzen 9 7900X (24) @ 5.74 GHz
GPU 1: AMD RX 9070/9070 XT [Discrete]
GPU 2: AMD Raphael [Integrated]
Memory: 3.42 GiB / 30.49 GiB (11%)
Swap: 0 B / 8.00 GiB (0%)
Disk (/): 259.39 GiB / 952.28 GiB (27%) - btrfs
Local IP (enp14s0): 192.168.1.217/24
Locale: en_US.UTF-8

I’m looking errors/bugs that turn the screen black or flickering when I’m on Youtube and in full screen mode.

4

Update. The bug appear to be gone. I put 60 hz instead of the 100 hz that the setting come with and adaptive sync turn off. I have a 1080p 60hz so I guess that the problem is. Not sure steam recording work though but I can try out OBS.