The first will print out all devices attached to USB, whether they are actually recognised or not, and the second will print out the kernel message buffer (which can be quite big after booting: try doing sudo dmesg -C then plug in your device and retype dmesg to see new messages).īus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.īus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubīus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.īus 001 Device 005: ID 05dc:a781 Lexar Media, ~ $ dmesg There are two commands that can be entered into a terminal for this: lsusb and dmesg.

If a device doesn't work, then the first step is to see if it is detected at all. If you are using a different distro on the Pi, then you should check around the distro's website or guides to see how to update it. You should use sudo apt-get update & sudo apt-get upgrade to get the latest firmware and kernel that will contain many patches not present in the default installs of Raspbian. More background information is available on the site documentation page. Several of the misbehaving devices have been caught in the wild and workarounds are possible. While they may work reasonably well with a PC, if they have non-compliant behaviour they are more likely to have problems when plugged into a Raspberry Pi. There are many devices out there that don't quite meet the respective USB specification. USB devices aren't all created equal either. While the hardware on these models is technically capable of implementing all USB2.0 and USB1.1 features, there are some known limitations. It is provided by an On-The-Go host controller: this is more usually found as the USB charging/PC connectivity port on a mobile phone or as the single USB port that supports a flash drive on a TV/media box. USB support on Raspberry Pi models that use BCM differs from the level of support found on PC hardware. Is your USB device not working with the Raspberry Pi? This sticky should help you.

Mac not detecting usb device endpoint