Integrated Camera 04f2:b7b9 (SunplusIT) disconnects in a loop on kernel 6.14

[Passw0rd404]

Pre-flight checklist

• I have searched existing issues and this is not a duplicate.
• I have read the Contributing Guidelines.
• I have verified the issue is reproducible with the latest available CachyOS kernel.

Upstream / vanilla kernel check

I was unable to test with a vanilla/upstream kernel

Kernel variant

linux-cachyos (EEVDF, Clang)

System information (cachyos-bugreport.sh)

- Distro: CachyOS
- Kernel: 6.14.10-1-cachyos
- Laptop: Lenovo LOQ 15IRX9 (Type 83DV)
- CPU: Intel Core i7-13650HX
- GPU: NVIDIA RTX 4050 Mobile
- Vendor: SunplusIT Inc
- USB ID: 04f2:b7b9
- Description: Integrated Camera UVC 1.50

Manual system information (if cachyos-bugreport.sh is unavailable)

https://paste.cachyos.org/p/45baba6.log
uploaded the logs

Bug description

The integrated webcam enters an infinite USB disconnect/reconnect loop
whenever any application tries to access it (Discord, ffplay, browsers, etc).
The camera LED never stays on. No application can use the camera.

dmesg output
uvcvideo 1-6:1.0: Found UVC 1.50 device Integrated Camera (04f2:b7b9)
usb 1-6: USB disconnect, device number X
usb 1-6: new high-speed USB device number Y using xhci_hcd
(repeats every ~0.5 seconds indefinitely)

Error when opening camera
[video4linux2,v4l2] ioctl(VIDIOC_DQBUF): No such device

What I tried

• Disabled USB autosuspend: echo -1 | sudo tee /sys/module/usbcore/parameters/autosuspend
• Tried uvcvideo quirks=0x100 (made it worse)
• Power control set to "on" for the USB device
• Reloading uvcvideo module

Additional Info

• This camera is confirmed affected by a known kernel bug tracked here:
  https://bbs.archlinux.org/viewtopic.php?id=303139
• The upstream fix patch was merged March 27 2025 but the issue persists on 6.14
• Camera works on Windows with Lenovo drivers

Steps to reproduce

use the laptop webcam

Expected behavior

to work

Actual behavior

does not work

Logs / stack traces

Additional system information

No response

[Passw0rd404]

by does not work I mean it open then close immediately forever

[damachine]

System information (cachyos-bugreport.sh)

• Kernel: 6.14.10-1-cachyos

hi you could try to update your kernel to lastet version.

[Passw0rd404]

System information (cachyos-bugreport.sh)

• Kernel: 6.14.10-1-cachyos

hi you could try to update your kernel to lastet version.

Tryed doing that it say you are up to date