Window Decorations severe lag Wayland X11

Help
1

I’m experiencing significant lag on my desktop when using window decorations other than Breeze, Oxygen, or even Platik, whether I’m on Wayland or X11. My setup includes an AMD 3700X 16-core processor, an AMD GPU 6700 XT, and 32GB of RAM, all running Arch Plasma 6.2.1 LTS. Interestingly, my laptop, which has a 12-core AMD Ryzen 5 PRO 4650U with Radeon Graphics and 15.0 GiB of RAM, does not have this problem, and it also runs Arch Plasma 6.2.1 LTS.

I’ve tried tweaking the settings in Kvantum, but it hasn’t made a difference. I also changed the resolution from 2160P to 1080P, but that didn’t help either. I’m using a Vizio 4K LCD at 60Hz, and I even performed a fresh install, but the issue persists. Any advice would be greatly appreciated!

2

Not a graphics expert, but just a clarifying question so folks who might know more can help guide you further - when you say “LTS”, do you mean that you’re using the Linux kernel “LTS” package in the Arch repositories (the linux-lts package)? Does anything change if you use the most recent kernel?

3

yes that is correct linux-lts Linux Kernal
Thank you.
I have tried the Latest kernel as well as the Linux-Zen with no change.

4

And just curious, if you run inxi -G on both the system with stuttering and the one that’s smooth, is anything different showing as far as drivers between the two systems?

5

I will try this and report back, thank you.

6

inxi -G Laptop
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Renoir [Radeon Vega Series /
Radeon Mobile Series] driver: amdgpu v: kernel
Device-2: DJJHFA1BIF2GN9 HP HD Camera driver: uvcvideo type: USB
Display: x11 server: X.Org v: 21.1.13 with: Xwayland v: 24.1.3 driver: X:
loaded: amdgpu unloaded: modesetting,vesa dri: radeonsi gpu: amdgpu
resolution: 1920x1080~60Hz
API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast
platforms: gbm,x11,surfaceless,device
API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.2.5-arch1.1
renderer: AMD Radeon Graphics (radeonsi renoir LLVM 18.1.8 DRM 3.59
6.11.4-zen2-1-zen)
API: Vulkan Message: No Vulkan data available.

inxi -G Desktop
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Navi 22 [Radeon RX 6700/6700
XT/6750 XT / 6800M/6850M XT] driver: amdgpu v: kernel
Display: wayland server: X.org v: 1.21.1.14 with: Xwayland v: 24.1.4
compositor: kwin_wayland driver: X: loaded: modesetting dri: radeonsi
gpu: amdgpu resolution: 1920x1080
API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast
platforms: gbm,wayland,x11,surfaceless,device
API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.2.6-arch1.1
renderer: AMD Radeon RX 6700 XT (radeonsi navi22 LLVM 18.1.8 DRM 3.59
6.11.6-arch1-1)
API: Vulkan Message: No Vulkan data available.

not much difference

7

The laptop is using an X11 session, and the device with the Radeon RX 6700 is using a Wayland session - have you checked logging in on the 6700 XT device using an X11 session? If that works, then there may be some issue with Kvantum + AMD + Wayland perhaps?

8

I just tried , not as much lag but still a bit and delayed movement…got me on this one

9

I may be stuck with the basic widow decoration, no big deal just an annoyance that given that option it cant be used…

10

So i tried the same setting on my laptop and as my desktop and the same lag occurs and and one point kwin crashed

Summary 
       PID: 4828 (systemsettings)
       UID: 1002 (jackbootthug)
       GID: 1002 (jackbootthug)
    Signal: 11 (SEGV)
 Timestamp: Fri 2024-11-15 11:39:08 MST (14min ago)

Command Line: /usr/bin/systemsettings
Executable: /usr/bin/systemsettings
Control Group: /user.slice/user-1002.slice/user@1002.service/app.slice/app-systemsettings@7260c35c33c54dd6bd7fcc1c07e1668b.service
Unit: user@1002.service
User Unit: app-systemsettings@7260c35c33c54dd6bd7fcc1c07e1668b.service
Slice: user-1002.slice
Owner UID: 1002 (jackbootthug)
Boot ID: c266a449b8904569bad4057cb7500feb
Machine ID: 17d5a7ee4dd944e098c814352b2ec0f8
Hostname: WeAreMany
Storage: /var/lib/systemd/coredump/core.systemsettings.1002.c266a449b8904569bad4057cb7500feb.4828.1731695948000000.zst (present)
Size on Disk: 21.2M
Message: Process 4828 (systemsettings) of user 1002 dumped core.

            Stack trace of thread 4828:
            #0  0x00007cca570a53f4 n/a (libc.so.6 + 0x963f4)
            #1  0x00007cca5704c120 raise (libc.so.6 + 0x3d120)
            #2  0x00007cca5a35d2a1 _ZN6KCrash19defaultCrashHandlerEi (libKF6Crash.so.6 + 0x62a1)
            #3  0x00007cca5704c1d0 n/a (libc.so.6 + 0x3d1d0)
            #4  0x00007cca57df9c11 _ZN22QWindowSystemInterface19handleScreenRemovedEP15QPlatformScreen (libQt6Gui.so.6 + 0x1f9c11)
            #5  0x00007cca55d1adb6 _ZN15QtWaylandClient15QWaylandDisplay23handleScreenInitializedEPNS_14QWaylandScreenE (libQt6WaylandClient.so.6 + 0x6ddb6)
            #6  0x00007cca55d3d546 _ZN15QtWaylandClient14QWaylandScreen15maybeInitializeEv (libQt6WaylandClient.so.6 + 0x90546)
            #7  0x00007cca55b17596 n/a (libffi.so.8 + 0x7596)
            #8  0x00007cca55b1400e n/a (libffi.so.8 + 0x400e)
            #9  0x00007cca55b16bd3 ffi_call (libffi.so.8 + 0x6bd3)
            #10 0x00007cca565fd8b0 n/a (libwayland-client.so.0 + 0x48b0)
            #11 0x00007cca565fe139 n/a (libwayland-client.so.0 + 0x5139)
            #12 0x00007cca565fe553 wl_display_dispatch_queue_pending (libwayland-client.so.0 + 0x5553)
            #13 0x00007cca566014cc wl_display_roundtrip_queue (libwayland-client.so.0 + 0x84cc)
            #14 0x00007cca55d16622 _ZN15QtWaylandClient15QWaylandDisplay10initializeEv (libQt6WaylandClient.so.6 + 0x69622)
            #15 0x00007cca55d16d31 _ZN15QtWaylandClient15QWaylandDisplay9reconnectEv (libQt6WaylandClient.so.6 + 0x69d31)
            #16 0x00007cca577a348a _ZN7QObject5eventEP6QEvent (libQt6Core.so.6 + 0x1a348a)
            #17 0x00007cca586fe31a _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt6Widgets.so.6 + 0xfe31a)
            #18 0x00007cca577585a8 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt6Core.so.6 + 0x1585a8)
            #19 0x00007cca57759035 _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData (libQt6Core.so.6 + 0x159035)
            #20 0x00007cca579c23fc n/a (libQt6Core.so.6 + 0x3c23fc)
            #21 0x00007cca56992559 n/a (libglib-2.0.so.0 + 0x5d559)
            #22 0x00007cca569f5157 n/a (libglib-2.0.so.0 + 0xc0157)
            #23 0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #24 0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #25 0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #26 0x00007cca57759a2f _ZN16QCoreApplication4execEv (libQt6Core.so.6 + 0x159a2f)
            #27 0x00005c2771bb53cd n/a (systemsettings + 0x143cd)
            #28 0x00007cca57034e08 n/a (libc.so.6 + 0x25e08)
            #29 0x00007cca57034ecc __libc_start_main (libc.so.6 + 0x25ecc)
            #30 0x00005c2771bb6075 n/a (systemsettings + 0x15075)
            
            Stack trace of thread 4833:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4835:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4857:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2)
            #2  0x00007cca578dcfc8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2dcfc8)
            #3  0x00007cca578de9d5 n/a (libQt6Core.so.6 + 0x2de9d5)
            #4  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4858:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2)
            #2  0x00007cca578dcfc8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2dcfc8)
            #3  0x00007cca578de9d5 n/a (libQt6Core.so.6 + 0x2de9d5)
            #4  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4891:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4880:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2)
            #2  0x00007cca578dcfc8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2dcfc8)
            #3  0x00007cca578de9d5 n/a (libQt6Core.so.6 + 0x2de9d5)
            #4  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4883:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4854:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #4  0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #5  0x00007cca57857072 _ZN7QThread4execEv (libQt6Core.so.6 + 0x257072)
            #6  0x00007cca59f7d638 n/a (libQt6Quick.so.6 + 0x37d638)
            #7  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #8  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #9  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4860:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca56991ab2 n/a (libglib-2.0.so.0 + 0x5cab2)
            #4  0x00007cca569c6026 n/a (libglib-2.0.so.0 + 0x91026)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4859:
            #0  0x00007cca571261fd syscall (libc.so.6 + 0x1171fd)
            #1  0x00007cca569c3f20 g_cond_wait (libglib-2.0.so.0 + 0x8ef20)
            #2  0x00007cca5695a98c n/a (libglib-2.0.so.0 + 0x2598c)
            #3  0x00007cca569ca137 n/a (libglib-2.0.so.0 + 0x95137)
            #4  0x00007cca569c6026 n/a (libglib-2.0.so.0 + 0x91026)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4861:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56993287 g_main_loop_run (libglib-2.0.so.0 + 0x5e287)
            #3  0x00007cca51de9bc4 n/a (libgio-2.0.so.0 + 0x113bc4)
            #4  0x00007cca569c6026 n/a (libglib-2.0.so.0 + 0x91026)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5175:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4905:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #4  0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #5  0x00007cca578571d2 _ZN7QThread3runEv (libQt6Core.so.6 + 0x2571d2)
            #6  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #7  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #8  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4917:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4884:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4836:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4928:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #4  0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #5  0x00007cca578571d2 _ZN7QThread3runEv (libQt6Core.so.6 + 0x2571d2)
            #6  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #7  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #8  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4837:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4881:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2)
            #2  0x00007cca578dcfc8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2dcfc8)
            #3  0x00007cca578de9d5 n/a (libQt6Core.so.6 + 0x2de9d5)
            #4  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4850:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #4  0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #5  0x00007cca578571d2 _ZN7QThread3runEv (libQt6Core.so.6 + 0x2571d2)
            #6  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #7  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #8  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4855:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2)
            #2  0x00007cca578dcfc8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2dcfc8)
            #3  0x00007cca578de9d5 n/a (libQt6Core.so.6 + 0x2de9d5)
            #4  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4856:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a27e2 pthread_cond_timedwait (libc.so.6 + 0x937e2)
            #2  0x00007cca578dcfc8 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2dcfc8)
            #3  0x00007cca578de9d5 n/a (libQt6Core.so.6 + 0x2de9d5)
            #4  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4829:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #4  0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #5  0x00007cca57857072 _ZN7QThread4execEv (libQt6Core.so.6 + 0x257072)
            #6  0x00007cca5850979e n/a (libQt6DBus.so.6 + 0x2e79e)
            #7  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #8  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #9  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4882:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4916:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca578dd030 _ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt6Core.so.6 + 0x2dd030)
            #3  0x00007cca5a0436ca n/a (libQt6Quick.so.6 + 0x4436ca)
            #4  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5174:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5231:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5237:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4832:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5239:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5236:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5232:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4908:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #4  0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #5  0x00007cca578571d2 _ZN7QThread3runEv (libQt6Core.so.6 + 0x2571d2)
            #6  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #7  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #8  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5177:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5173:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4923:
            #0  0x00007cca5711abb0 ppoll (libc.so.6 + 0x10bbb0)
            #1  0x00007cca569f5227 n/a (libglib-2.0.so.0 + 0xc0227)
            #2  0x00007cca56991a55 g_main_context_iteration (libglib-2.0.so.0 + 0x5ca55)
            #3  0x00007cca579bf71d _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x3bf71d)
            #4  0x00007cca57764566 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x164566)
            #5  0x00007cca578571d2 _ZN7QThread3runEv (libQt6Core.so.6 + 0x2571d2)
            #6  0x00007cca578d840f n/a (libQt6Core.so.6 + 0x2d840f)
            #7  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #8  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4834:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5176:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4918:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 4919:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            
            Stack trace of thread 5238:
            #0  0x00007cca5709fa19 n/a (libc.so.6 + 0x90a19)
            #1  0x00007cca570a2479 pthread_cond_wait (libc.so.6 + 0x93479)
            #2  0x00007cca484ced6e n/a (libgallium-24.2.5-arch1.1.so + 0xced6e)
            #3  0x00007cca484ab77c n/a (libgallium-24.2.5-arch1.1.so + 0xab77c)
            #4  0x00007cca484cec9d n/a (libgallium-24.2.5-arch1.1.so + 0xcec9d)
            #5  0x00007cca570a339d n/a (libc.so.6 + 0x9439d)
            #6  0x00007cca5712849c n/a (libc.so.6 + 0x11949c)
            ELF object binary architecture: AMD x86-64
11

Hmm - might be worth checking with the Kvantum developers to see if anyone else is experiencing something similar with that theme engine? (And if you’re set on customized window decorations in the meantime, Klassy might be another option to try?)

(Or someone with knowledge of the graphics stack workings might be able to troubleshoot more)