HIGH CPU usage of xfce4-terminal

mpv Information

mpv v0.40.0 Copyright © 2000-2025 mpv/MPlayer/mplayer2 projects
libplacebo version: v7.351.0
FFmpeg version: 7.1.1
FFmpeg library versions:
   libavcodec      61.19.101
   libavdevice     61.3.100
   libavfilter     10.4.100
   libavformat     61.7.100
   libavutil       59.39.100
   libswresample   5.3.100
   libswscale      8.3.100

Other Information

184615 smooker@st ~ $ cat /etc/os-release | grep "NAME"
NAME=Gentoo
PRETTY_NAME="Gentoo Linux"

184642 smooker@st ~ $ uname -a
Linux st 6.15.5-gentoo-dist #1 SMP PREEMPT_DYNAMIC Sun Jul 13 16:17:55 EEST 2025 x86_64 Intel(R) Core(TM) i7-9850H CPU @ 2.60GHz GenuineIntel GNU/Linux

184701 smooker@st ~ $ lspci -nn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630] [8086:3e9b] (rev 02)
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU106GLM [Quadro RTX 3000 Mobile / Max-Q] [10de:1f36] (rev a1)

184746 smooker@st ~ $ glxinfo -B | grep "OpenGL version string"
OpenGL version string: 4.6 (Compatibility Profile) Mesa 25.1.5

Reproduction Steps

--no-config : does not help :)
--no-terminal : everything is OK.

Expected Behavior

about 1% of 1 CORE/THREAD.
Imagine I was on 19200 terminal.

Actual Behavior

about 15% of 1 CORE/THREAD, because of CRAZY refresh rate of the terminal.

Log File

not GPU related. CPU Usage is from terminal emulator.

Sample Files

No response

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of --log-file=output.txt.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

Start by reproducing the report on Linux with the reported mpv version, comparing normal operation with --no-terminal and --no-config while observing terminal CPU usage. No source files or tests are identified; done means identifying the cause of the terminal refresh behavior and reducing usage toward the expected level without breaking terminal output.