Hi, guys.
My operating system is download from NVIDIA, the package name is nv-jetson-nano-sd-card-image-r32.2.1.zip, it/s based on Ubuntu 18.04.2 LTS.
I connect 4 usb cameras to usb3.0 connectors of carrier board, and run my program to capture images, but it shows “No space left on device” while VIDIOC_STREAMON. So I checked my disk capability, it shows:
Filesystem Size Used Avail Use% Mounted on
/dev/mmcblk0p1 30G 9.7G 19G 35% /
none 1.8G 0 1.8G 0% /dev
tmpfs 2.0G 4.0K 2.0G 1% /dev/shm
tmpfs 2.0G 29M 2.0G 2% /run
tmpfs 5.0M 8.0K 5.0M 1% /run/lock
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
//192.168.1.249/share 977G 57G 921G 6% /home/nano/win
tmpfs 397M 12K 397M 1% /run/user/120
tmpfs 397M 28K 397M 1% /run/user/1000
And then I search “No space left on device while VIDIOC_STREAMON” on the Internet, and it shows the problem is band-width of usb bus. So I check the hardware information by “sudo lshw”, it shows:
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 4.9.140-tegra xhci-hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 4.09
capabilities: usb-2.00
configuration: driver=hub slots=5 speed=480Mbit/s
*-usb
description: USB hub
product: 4-Port USB 2.1 Hub
vendor: Generic
physical id: 2
bus info: usb@1:2
version: 1.20
capabilities: usb-2.10
configuration: driver=hub slots=4 speed=480Mbit/s
*-usb:0
description: Video
product: RecordexUSA
vendor: RXSX
physical id: 1
bus info: usb@1:2.1
version: 23.01
serial: 200901010001
capabilities: usb-2.10
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-usb:1
description: Video
product: RecordexUSA
vendor: RXSX
physical id: 2
bus info: usb@1:2.2
version: 23.01
serial: 200901010001
capabilities: usb-2.10
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-usb:2
description: Video
product: RecordexUSA
vendor: RXSX
physical id: 3
bus info: usb@1:2.3
version: 23.01
serial: 200901010001
capabilities: usb-2.10
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-usb:3
description: USB hub
product: 4-Port USB 2.0 Hub
vendor: Generic
physical id: 4
bus info: usb@1:2.4
version: 1.04
capabilities: usb-2.10
configuration: driver=hub slots=4 speed=480Mbit/s
*-usb
description: Video
product: HD USB Camera
vendor: HD USB Camera
physical id: 4
bus info: usb@1:2.4.4
version: 27.02
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 4.9.140-tegra xhci-hcd
physical id: 2
bus info: usb@2
logical name: usb2
version: 4.09
capabilities: usb-3.00
configuration: driver=hub slots=4 speed=5000Mbit/s
*-usb
description: USB hub
product: 4-Port USB 3.1 Hub
vendor: Generic
physical id: 1
bus info: usb@2:1
version: 1.20
capabilities: usb-3.20
configuration: driver=hub slots=4 speed=5000Mbit/s
*-usb
description: USB hub
product: 4-Port USB 3.0 Hub
vendor: Generic
physical id: 4
bus info: usb@2:1.4
version: 1.04
capabilities: usb-3.00
configuration: driver=hub slots=4 speed=5000Mbit/s
It says all of usb3.0 connectors are connected to a usb2.0 hub, so my cameras share the band-width of usb2.0, that is 480Mbit/s, but “Jetson Nano Developer Kit User Guide” says “[J32 and J33] are each a stack of two USB 3.0 Type A connectors…All four are connected to the Jetson Nano module via a USB 3.0 hub built into the carrier board” on page 7.
So, I searched “How to enable USB3.0 on Jetson Nano carrier board” on the Internet, and it says “We can enable USB3.0 on Jetson TX1 by append ‘usb_port_owner_info=2’ to kernel args”, and It’s not usable when I tried.
Now, I don’t know how to fix the problem, is there anybody who can help me? Thanks!