JeVois cam worked once but not anymore on Debian Stretch [cable or connexion problem]

Question

EDIT : Ok, it's sometime working...perhaps there is a connexion problem on the cam or on my USB ports. Right now, while I edit this post, the video is working.

Hi all,

I managed to make JeVois cam working on my Debian Stretch, but after the first try, few days later, I tried again and my system isn't anymore recognizing the cam.

I flashed the last image sucessfully, the cam is booting but gucview can't see the device.

I'm plugin the cam exactly on the same USB ports than for the first tries few days ago.

dmesg extract :

1848.110481] usb 1-1.2: new high-speed USB device number 3 using ehci-pci
[ 1848.614441] usb 1-1.2: device not accepting address 3, error -71
[ 1848.858483] usb 1-1.2: new high-speed USB device number 5 using ehci-pci
[ 1848.967722] usb 1-1.2: New USB device found, idVendor=1d6b, idProduct=0102
[ 1848.967725] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1848.967727] usb 1-1.2: Product: JeVois-A33 Smart Camera
[ 1848.967728] usb 1-1.2: Manufacturer: JeVois Inc
[ 1848.991546] cdc_acm 1-1.2:1.2: ttyACM0: USB ACM device
[ 1848.992278] media: Linux media interface: v0.10
[ 1848.993001] usbcore: registered new interface driver cdc_acm
[ 1848.993002] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 1848.997672] Linux video capture interface: v2.00
[ 1849.004326] uvcvideo: Found UVC 1.00 device JeVois-A33 Smart Camera (1d6b:0102)
[ 1849.005256] uvcvideo 1-1.2:1.0: Entity type for entity Processing 2 was not initialized!
[ 1849.005260] uvcvideo 1-1.2:1.0: Entity type for entity Camera 1 was not initialized!
[ 1849.005591] input: JeVois-A33 Smart Camera as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/input/input16
[ 1849.005709] usbcore: registered new interface driver uvcvideo
[ 1849.005710] USB Video Class driver (1.1.1)
[ 1849.569760] usb 1-1.2: USB disconnect, device number 5
[ 1849.842442] usb 1-1.2: new full-speed USB device number 6 using ehci-pci
[ 1849.922407] usb 1-1.2: device descriptor read/64, error -32
[ 1850.110437] usb 1-1.2: device descriptor read/64, error -32
[ 1850.298480] usb 1-1.2: new full-speed USB device number 7 using ehci-pci
[ 1850.378470] usb 1-1.2: device descriptor read/64, error -32
[ 1850.566483] usb 1-1.2: device descriptor read/64, error -32
[ 1850.754480] usb 1-1.2: new full-speed USB device number 8 using ehci-pci
[ 1851.170479] usb 1-1.2: device not accepting address 8, error -32
[ 1851.250384] usb 1-1.2: new full-speed USB device number 9 using ehci-pci
[ 1851.666488] usb 1-1.2: device not accepting address 9, error -32
[ 1851.666711] usb 1-1-port2: unable to enumerate USB device

Any idea on this problem ?

Thanks !

Sincerely.

Answer 1

Have you tried rebooting your host? I get this kind of USB errors sometimes with my host, it just gets confused after too many usb connect/disconnect. Especially if I just unplug JeVois while guvcview is still running, I often end up with some kernel lockups and other weird things on my host. Just make sure you quit your video grabbing software before you unplug JeVois and you should not have to reboot the host too often.

Or this could indeed be a flaky cable, connection, or power supply to JeVois.

Comments

The last time it worked again, after many unseccesfull atemps, I did not reboot the host, I only unplugged the USB cable from the host and plugged it again.
But thanks, I'll try also a rebbot from the host next time.