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Questions tagged [udev]

Udev manages the Linux /dev directory, and hooks userspace into kernel device events.

udev (userspace /dev) is a device manager for the Linux kernel. As the successor of devfsd and hotplug, udev primarily manages device nodes in the /dev directory. At the same time, udev also handles all user space events raised when hardware devices are added into the system or removed from it, including firmware loading as required by certain devices.

https://en.wikipedia.org/wiki/Udev

https://wiki.debian.org/udev

http://reactivated.net/writing_udev_rules.html

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Default Udev rules

If i have not defined my own set of udev rules what will be the default udev rules and how can I know them. Consider this question in the context of dynamically registered character driver. Thanks
user1395806
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How to find the udev rule which causes the loading of the kernel module 88XXau.ko?

In my Linux distribution I use an Edimax EW-7811UTC Wi-Fi USB Adapter. Installation of the driver rtl8812au I have installed the driver rtl8812au from source by following steps: building of the kernel module 88XXau.ko (command make) from…
frankfalse
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udev not loading modules?

I have a busy box based custom distro based on debian. It uses udev from the older debian versions (IIRC it was based on Wheezy) that launched create_static_nodes as part of the udev init script. Kernel on custom distro is 4.19-686 based so it's up…
user3161924
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Why do I have multiple product and vendor id's?

GOAL: I am trying to connect 4 RFID readers to a Pi and I need to differentiate each one's port. WHAT I'VE DONE: I entered lsusb into terminal with nothing but one reader plugged in. It returns : Bus 001 Device 004: ID 0c27:232a RFIDeas, Inc This…
Kevin Coleman
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udev rules for FTDI device are not working in VMware Ubuntu 16.04

I have set up a VMware (14.1.1) environment with Ubuntu 16.04 where I was trying to control some FTDI devices over FTDI's D2xx driver. However, I can not open my FTDI device or communicate with it. Using FT_CreateDeviceInfoList(&NumDevs); tells me…
pixelpress
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what is the udev rule to allow specific vendor thumb drive?

I need a udev rule so that it should detect the vendor of the USB pendrive, and allow only specific vendors, rejecting all others. How to write such a rule ? Where should the rules be placed /etc/udev/rules.d or /lib/udev/rules.d/ What is the…
subbarao
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How can I create a udev rule to run a script when USB store is plugged in?

I need to run a Python or a shell script whenever a USB is plugged in. So I need to create a udev rule for that.
Abhishek
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Why do I get console output from ACPID when devtmpfs is mounted and logged when not?

I have a weird issue which I diagnosed all the way back to simply being that if I mount devtmpfs then launch ACPID daemon, i get console output, if I don't mount devtmpfs, the ACPI daemon output goes to the log. I also get some rpcbind messages…
user3161924
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