La cámara USB (Logitech) deja de funcionar hasta que se vuelve a conectar

Question

Tengo una computadora de escritorio Dell con Ubuntu 18.04 y una cámara Logitech BRIO. Funcionó bien con Ubuntu 16.04 y funcionó bien durante algunas semanas después de actualizar a 18.04, realizando cientos de disparos. Luego, a partir de hace una o dos semanas, recibe algunas tomas, a veces 30, a veces 50, y luego deja de funcionar hasta que se desconecta y se vuelve a conectar. Tengo otra computadora de escritorio Dell, también con Ubuntu 18.04 y la misma cámara, pero esa no tiene conexión a internet y no se actualiza. Ese sigue funcionando bien. Cambio las cámaras y el problema sigue estando en esta computadora.

Vuelvo a conectar la cámara y ejecuto este script para realizar pruebas, usando fswebcam para obtener tomas y guardarlas como jpg:

#!/bin/bash

for index in {0..100}
do
    echo shot $index
    echo Time: `date +"%Y-%m-%d %T"`
    fswebcam -d v4l2:/dev/video0 -r  4096x2160 --jpeg -1 --no-banner -S 9 --verbose temp/shot.jpg
    sleep 1
done
exit

Funciona bien de 20 a 50 veces y luego fswebcam dice "No se puede encontrar un formato de paleta compatible". Esta es la salida para dos disparos consecutivos, el último que funcionó y el primero que falló:

shot 62
Time: 2021-11-30 11:26:17
--- Opening v4l2:/dev/video0...
>>> Using 'v4l2' source module.
/dev/video0 opened.
src_v4l2_get_capability,87: /dev/video0 information:
src_v4l2_get_capability,88: cap.driver: "uvcvideo"
src_v4l2_get_capability,89: cap.card: "Logitech BRIO"
src_v4l2_get_capability,90: cap.bus_info: "usb-0000:00:14.0-8"
src_v4l2_get_capability,91: cap.capabilities=0x84200001
src_v4l2_get_capability,92: - VIDEO_CAPTURE
src_v4l2_get_capability,103: - STREAMING
No input was specified, using the first.
src_v4l2_set_input,181: /dev/video0: Input 0 information:
src_v4l2_set_input,182: name = "Camera 1"
src_v4l2_set_input,183: type = 00000002
src_v4l2_set_input,185: - CAMERA
src_v4l2_set_input,186: audioset = 00000000
src_v4l2_set_input,187: tuner = 00000000
src_v4l2_set_input,188: status = 00000000
src_v4l2_set_pix_format,520: Device offers the following V4L2 pixel formats:
src_v4l2_set_pix_format,533: 0: [0x56595559] 'YUYV' (YUYV 4:2:2)
src_v4l2_set_pix_format,533: 1: [0x47504A4D] 'MJPG' (Motion-JPEG)
src_v4l2_set_pix_format,533: 2: [0x3231564E] 'NV12' (Y/CbCr 4:2:0)
Using palette MJPEG
src_v4l2_set_mmap,672: mmap information:
src_v4l2_set_mmap,673: frames=4
src_v4l2_set_mmap,722: 0 length=17694720
src_v4l2_set_mmap,722: 1 length=17694720
src_v4l2_set_mmap,722: 2 length=17694720
src_v4l2_set_mmap,722: 3 length=17694720
--- Capturing frame...
Skipping 9 frames...
Capturing 1 frames...
Captured 10 frames in 0.31 seconds. (32 fps)
--- Processing captured image...
Setting output format to JPEG, quality -1
Disabling banner.
Writing JPEG image to 'temp/shot.jpg'.
shot 63
Time: 2021-11-30 11:26:29
--- Opening v4l2:/dev/video0...
>>> Using 'v4l2' source module.
/dev/video0 opened.
src_v4l2_get_capability,87: /dev/video0 information:
src_v4l2_get_capability,88: cap.driver: "uvcvideo"
src_v4l2_get_capability,89: cap.card: "Logitech BRIO"
src_v4l2_get_capability,90: cap.bus_info: "usb-0000:00:14.0-8"
src_v4l2_get_capability,91: cap.capabilities=0x84200001
src_v4l2_get_capability,92: - VIDEO_CAPTURE
src_v4l2_get_capability,103: - STREAMING
No input was specified, using the first.
src_v4l2_set_input,181: /dev/video0: Input 0 information:
src_v4l2_set_input,182: name = "Camera 1"
src_v4l2_set_input,183: type = 00000002
src_v4l2_set_input,185: - CAMERA
src_v4l2_set_input,186: audioset = 00000000
src_v4l2_set_input,187: tuner = 00000000
src_v4l2_set_input,188: status = 00000000
src_v4l2_set_pix_format,520: Device offers the following V4L2 pixel formats:
src_v4l2_set_pix_format,533: 0: [0x56595559] 'YUYV' (YUYV 4:2:2)
src_v4l2_set_pix_format,533: 1: [0x47504A4D] 'MJPG' (Motion-JPEG)
src_v4l2_set_pix_format,533: 2: [0x3231564E] 'NV12' (Y/CbCr 4:2:0)
Unable to find a compatible palette format.

dmesg -T muestra esto, a partir del momento en que se volvió a conectar la cámara:

[Tue Nov 30 11:18:03 2021] usb 2-8: USB disconnect, device number 7
[Tue Nov 30 11:18:10 2021] usb 2-8: new SuperSpeed USB device number 8 using xhci_hcd
[Tue Nov 30 11:18:10 2021] usb 2-8: New USB device found, idVendor=046d, idProduct=085e
[Tue Nov 30 11:18:10 2021] usb 2-8: New USB device strings: Mfr=0, Product=2, 
SerialNumber=3
[Tue Nov 30 11:18:10 2021] usb 2-8: Product: Logitech BRIO
[Tue Nov 30 11:18:10 2021] usb 2-8: SerialNumber: 93004248
[Tue Nov 30 11:18:10 2021] uvcvideo: Found UVC 1.00 device Logitech BRIO (046d:085e)
[Tue Nov 30 11:18:10 2021] input: Logitech BRIO as 
/devices/pci0000:00/0000:00:14.0/usb2/2-8/2-8:1.0/input/input20
[Tue Nov 30 11:18:10 2021] usb 2-8: current rate 16000 is different from the runtime rate 24000
[Tue Nov 30 11:18:10 2021] usb 2-8: current rate 16000 is different from the runtime rate 32000
[Tue Nov 30 11:18:10 2021] usb 2-8: current rate 16000 is different from the runtime rate 48000
[Tue Nov 30 11:18:10 2021] input: Logitech BRIO as /devices/pci0000:00/0000:00:14.0/usb2/2-8/2-8:1.4/0003:046D:085E.0006/input/input21
[Tue Nov 30 11:18:10 2021] hid-generic 0003:046D:085E.0006: input,hidraw0: USB HID v1.11 Device [Logitech BRIO] on usb-0000:00:14.0-8/input4
[Tue Nov 30 11:18:10 2021] usb 2-8: current rate 16000 is different from the runtime rate 48000
[Tue Nov 30 11:18:10 2021] usb 2-8: current rate 16000 is different from the runtime rate 48000
[Tue Nov 30 11:18:10 2021] usb 2-8: current rate 16000 is different from the runtime rate 48000
[Tue Nov 30 11:26:21 2021] usb 2-8: Set SEL for device-initiated U1 failed.
[Tue Nov 30 11:26:21 2021] usb 2-8: Set SEL for device-initiated U2 failed.
[Tue Nov 30 11:26:27 2021] usb 2-8: Set SEL for device-initiated U1 failed.
[Tue Nov 30 11:26:27 2021] usb 2-8: Set SEL for device-initiated U2 failed.
[Tue Nov 30 11:26:28 2021] uvcvideo: Failed to set UVC probe control : -32 (exp. 26).
[Tue Nov 30 11:26:28 2021] uvcvideo: Failed to set UVC probe control : -32 (exp. 26).
[Tue Nov 30 11:26:28 2021] uvcvideo: Failed to set UVC probe control : -32 (exp. 26).
[Tue Nov 30 11:26:28 2021] uvcvideo: Failed to set UVC probe control : -32 (exp. 26).
[Tue Nov 30 11:26:28 2021] uvcvideo: Failed to set UVC probe control : -32 (exp. 26).
[Tue Nov 30 11:26:28 2021] uvcvideo: Failed to set UVC probe control : -32 (exp. 26).

Y eso último se repite muchas veces.

He intentado esto muchas veces y siempre falla de la misma manera, comenzando con "usb 2-8: falló el ajuste SEL para U1 iniciado por el dispositivo".

¿Cómo puedo encontrar y solucionar este problema?

Answer 1

Como comenté, tengo un problema similar en Windows 10. Recientemente noté una advertencia en los registros que mencionaba que estaba usando la cámara web con un puerto USB 2.0 (el único que queda disponible en la computadora). Cambié a un puerto USB 3.2 y no me desconecté desde hace más de una hora... Leí en varios lugares (como aquí) que la cámara web solo funciona como se esperaba en 4K con el cable predeterminado/logitech o uno totalmente compatible, que debería ser USB3 de 480 MB como mínimo. Por lo tanto, conectarlo a un USB2 podría resultar problemático. Como lo usas -r 4096x2160, ¿tu problema podría ser idéntico?