floating clients get killed while they're moved constantly for some period of time.

[100x65b1111000]

Description

Floating clients crash when they're grabbed and moved for some period of time via touchpad/mouse.

Here's the bug in action:

2026-05-16.19-05-15.mp4

[dawsers]

Could you give me more details? What is the app? Is it X11 or Wayland?

Maybe a log and config would also help, because it doesn't happen when I open a window and move it around until my wrist gives up :-)

[100x65b1111000]

Could you give me more details? What is the app? Is it X11 or Wayland?

I'm really sorry I should've done that in the bug report but the thing is I can reproduce this with all of the floating clients. The apps are wayland.

Here's the same bug with another application:

2026-05-16.22-57-21.mp4

I wouldn't have found out about this if I wasn't testing out the dynamic shadows...

I can reproduce this issue on the main with the default config too but for that I have to do it very fast and for quite a long time and have to set pointer accel to 1 too.But with my config I can produce it rather earlier.

Here's is the config with debug log with scroll -d:

debug log: https://gist.github.com/100x65b1111000/0fe2b1a91d28a49752d985af6b497b8c
config: https://gist.github.com/100x65b1111000/9a4c1f3b75ca5dc8ad1b715da01dfe0b

[Diax170]

I noticed the same bug recently. Tested with the Kitty terminal (Wayland-native)

Edit: my config is here and I will post my hardware info once I have time. I use the EGL renderer

[dawsers]

I have tried your config and cannot reproduce the problem, but my hardware and bar are different. We should try to reduce the configuration to the minimum possible complexity and make it independent of hardware and external configurations to find where the problem lies. Please:

1. Disable waybar
2. Disable monitor and input configuration so scroll uses defaults
3. Remove all window rules

We can start from there to remove other dependencies and reduce the testing surface. Thank you!

[Diax170]

Update:

When I run kitty from a terminal and move the kitty window around, when the window vanishes kitty logs this

~ ❯ kitty       
file descriptor expected, object (44), message format_table(hu)
[13,015] [glfw error 65544]: Wayland: fatal display error: Invalid argument

[Diax170]

Edit: my config is here and I will post my hardware info once I have time. I use the EGL renderer

Here's my inxi -Fxz output

System:
  Kernel: 7.0.3-zen1 arch: x86_64 bits: 64 compiler: gcc v: 15.2.0
  Console: pty pts/2 Distro: NixOS 26.05 (Yarara)
Machine:
  Type: Laptop System: LENOVO product: 21MW v: ThinkBook 16 G7 ARP
    serial: <filter>
  Mobo: LENOVO model: LNVNB161216 v: SDK0T76549 WIN serial: <filter>
    Firmware: UEFI vendor: LENOVO v: P6CN30WW date: 10/08/2025
Battery:
  ID-1: BAT0 charge: 29.2 Wh (68%) condition: 42.9/45 Wh (95.3%) volts: 12.71
    min: 11.52 model: Sunwoda L22D3PE0 status: charging
CPU:
  Info: 6-core model: AMD Ryzen 5 7535HS with Radeon Graphics bits: 64
    type: MT MCP arch: Zen 3+ rev: 1 cache: L1: 384 KiB L2: 3 MiB L3: 16 MiB
  Speed (MHz): avg: 3265 min/max: 416/4605 boost: enabled cores: 1: 3265
    2: 3265 3: 3265 4: 3265 5: 3265 6: 3265 7: 3265 8: 3265 9: 3265 10: 3265
    11: 3265 12: 3265 bogomips: 79051
  Flags-basic: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a
    ssse3 svm
Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Rembrandt [Radeon 680M]
    vendor: Lenovo driver: amdgpu v: kernel arch: RDNA-2 bus-ID: 75:00.0
    temp: 46.0 C
  Device-2: Syntek Integrated RGB Camera driver: uvcvideo type: USB
    bus-ID: 3-1.4:14
  Device-3: Chicony Integrated Camera driver: uvcvideo type: USB
    bus-ID: 5-1:2
  Display: unspecified server: Xwayland v: 24.1.11 driver: gpu: amdgpu
    resolution: <missing: xdpyinfo/xrandr> resolution: 1: 3440x1440 2: 1920x1080
    3: 1920x1200
  API: EGL Message: EGL data requires eglinfo. Check --recommends.
  Info: Tools: wl: nwg-displays
Audio:
  Device-1: Advanced Micro Devices [AMD/ATI] Radeon High Definition Audio
    vendor: Lenovo driver: snd_hda_intel v: kernel bus-ID: 75:00.1
  Device-2: Advanced Micro Devices [AMD] Audio Coprocessor vendor: Lenovo
    driver: snd_pci_acp6x v: kernel bus-ID: 75:00.5
  Device-3: Advanced Micro Devices [AMD] Ryzen HD Audio vendor: Lenovo
    driver: snd_hda_intel v: kernel bus-ID: 75:00.6
  Device-4: Lenovo ThinkVision T24v Wide Monitor for USB-Audio
    driver: hid-generic,snd-usb-audio,usbhid type: USB bus-ID: 3-1.3:13
  API: ALSA v: k7.0.3-zen1 status: kernel-api
  Server-1: PipeWire v: 1.6.3 status: n/a (root, process)
Network:
  Device-1: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet
    vendor: Lenovo driver: r8169 v: kernel port: 5000 bus-ID: 01:00.0
  IF: enp1s0 state: down mac: <filter>
  Device-2: Realtek RTL8852CE PCIe 802.11ax Wireless Network vendor: Lenovo
    driver: rtw89_8852ce v: kernel port: 4000 bus-ID: 02:00.0
  IF: wlp2s0 state: up mac: <filter>
  IF-ID-1: ip6tnl0 state: down mac: <filter>
  IF-ID-2: tailscale0 state: unknown speed: -1 duplex: full mac: N/A
Bluetooth:
  Device-1: Realtek Bluetooth Radio driver: btusb v: 0.8 type: USB
    bus-ID: 3-3:5
  Report: hciconfig ID: hci0 rfk-id: 6 state: down
    bt-service: enabled,running rfk-block: hardware: no software: yes
    address: <filter>
Drives:
  Local Storage: total: 476.94 GiB used: 102.86 GiB (21.6%)
  ID-1: /dev/nvme0n1 vendor: Micron model: MTFDKCD512TGE-1BK1AABLA
    size: 476.94 GiB temp: 38.9 C
Partition:
  ID-1: / size: 471.82 GiB used: 102.54 GiB (21.7%) fs: btrfs dev: /dev/dm-0
    mapped: portition
  ID-2: /boot size: 1022 MiB used: 329.3 MiB (32.2%) fs: vfat
    dev: /dev/nvme0n1p1
  ID-3: /home size: 471.82 GiB used: 102.54 GiB (21.7%) fs: btrfs
    dev: /dev/dm-0 mapped: portition
Swap:
  ID-1: swap-1 type: file size: 2 GiB used: 0 KiB (0.0%) file: /swap/swapfile
Sensors:
  Src: /sys System Temperatures: cpu: 53.9 C mobo: 39.8 C gpu: amdgpu
    temp: 48.0 C
  Fan Speeds (rpm): N/A
Info:
  Memory: total: 28 GiB note: est. available: 26.47 GiB used: 6.03 GiB (22.8%)
  Processes: 423 Uptime: 19h 56m Init: systemd
  Packages: 931 Compilers: gcc: 15.2.0 Shell: Sudo v: 1.9.17p2 inxi: 3.3.40

[Diax170]

Can reproduce with default config. Logs are here. Even though I ran scroll with the -V flag there aren't any special logs, besides the Kitty logs I mentioned earlier:

file descriptor expected, object (45), message format_table(hu)
[19,762] [glfw error 65544]: Wayland: fatal display error: Invalid argument

[Diax170]

This bug seems to only apply to Kitty though. Tested with XTerm, LibreWolf and Audacity windows. They were fine

I coudn't reproduce the bug on Sway

[dawsers]

This bug seems to only apply to Kitty though. Tested with XTerm, LibreWolf and Audacity windows. They were fine

The bug doesn't exist on Sway

I use kitty and haven't been able to reproduce it, and @100x65b1111000 seems to have the issue with any application.

I think it would be useful if any of you could do what I described above: disable most things (including the bar), and create a minimal config that still shows the issue. That way, at least, we can discard interactions with other applications.

[dawsers]

I have committed an optimization in 042763a. I am not sure that could fix this issue, but I am running blind here. If you guys have high refresh rate monitors/mouses, it could be temporary animations were spamming the system. I am not sure how this would kill the application, but it is worth a try, and an improvement anyway.

[Diax170]

Sorry to tell you but this didn't fix it. So far I've noticed that the lower the refresh rate I set, the longer the time till the window vanishes (how long i have to drag the window) is. For example 100Hz is ~10s, 60Hz is ~15s and 30Hz is ~30s

[dawsers]

OK, have you been able to create a minimal config file that reproduces the problem? (no external apps, no monitor or input config, no window rules)

[Diax170]

Not yet, I can only tell that is occurs with the default config (config.in)

[dawsers]

OK, that is good enough.

I will try another approach. Thanks.