Udev is a Linux process that manages device file entries under /dev

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418 views

How to differentiate USB flash drive and CD-ROM?

I want to differentiate an USB flash drive and a CD-ROM. My requirement is when I connect to a system only the CD-ROM should work, but not the USB key.
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0answers
101 views

Linux choke on interface labels > 16 characters under Fedora 20+

I have an app that creates a subinterface (appending :ABCDE to the associated NIC label). This worked fine when interfaces were labelled something like eth0 or eth1. However, under Fedora 20 (and ...
22
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1answer
22k views

How to assign USB driver to device

This question is two-fold: First, how do you manually detach a driver from a USB device and attach a different one? For example, I have a device that when connected automatically uses the ...
5
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1answer
3k views

Udev rule is not being used?

I'm setting up udev to handle my external USB hard drive when it gets plugged in and removed (no mounting yet). So far, I've made two new rules in /etc/udev/rules.d/10-local.rules to log ...
44
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4answers
8k views

Why are network interfaces not in /dev like other devices?

I'm mostly curious, but why aren't network interfaces in /dev? Are there any other kinds of devices that aren't represented as a node under /dev?
2
votes
1answer
449 views

btrfs RAID1 array shows as two disks

I mounted 2 drives as a RAID1 btrfs array (btrfs v3.12, Ubuntu 14.04). Everything's working fine except nautilus and other GUI-based apps see two disks, both labeled "Raid1". One is mounted (the ...
8
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2answers
3k views

udev rule for assigning known symlinks for identical usb serial devices

I have two (and possibly in the future, more) USB serial devices which are identical (down to the serial number, unfortunately) - they're actually BTC miners. Currently they end up as ttyUSBX where X ...
3
votes
2answers
8k views

Arch Linux not booting after system update

After running a system update pacman -Syu with the testing repo not commented, my computer no longer boots. It shows the udev loading, then shows a black screen with a cursor blinking in upper left. I ...
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1answer
120 views

What's the relation betwen ACPI, udev, HAL and pm-utils

I'm trying to figure out how the power management in achieved in Linux (because I want to fix some issues in my laptop). I have found thoughtful documentation about these elements separately. In other ...
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1answer
237 views

Udev (197) last_rule not working

I am using udev version 197. I write a rule /etc/udev/rules.d/00-test.rules It's content is : SUBSYSTEMS=="usb", ATTRS{bInterfaceClass}=="e0", ATTRS{bInterfaceSubClass}=="01", ...
1
vote
1answer
222 views

How to map extended buttons on mouse?

I am trying to follow this guide to using a Logitech G600. I have (using a windows computer) mapped each key combo on the mouse to something on a normal keyboard. I have set up some rules in ...
3
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1answer
362 views

Mapping mouse buttons with udev hwdb

Following this guide: http://www.vxnick.com/blog/2014/10/binding-extra-mouse-buttons-on-linux/ I've set up a config file: $ lsusb | grep G500 Bus 006 Device 007: ID 046d:c068 Logitech, Inc. G500 ...
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0answers
222 views

Bluetooth keyboard not showing up in /dev/input

I've just installed an Apple Wireless keyboard on a Debian system. I used this guide and only console tools — no X on that machine yet. The keyboard works fine. Now I want to remap a right Cmd key ...
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0answers
194 views

Handle mouse and keyboard usb device in udev

I'm trying to set up usbip on our thin clients to forward (almost all) USB devices to the server. What I don't want to forward are all input devices and all hub / virtual devices. So I want to ...
1
vote
1answer
241 views

Mount USB stick without partitions using udev rules

I need to have udev mount a USB device that has raw data, which appears like /dev/sdc, but in the same time if another stick has partitions I only need to have folders mounted only for those ...
4
votes
1answer
174 views

Starting backintime at disk plug

I use backintime, you can tell it to backup via backintime -b as user (not root, but I can change that if needed). Now I'd like it to start as soon as I plug my backup hd. As udev is likely the right ...
2
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1answer
316 views

How to wait for a /dev/video0 before starting a service

First off, I am systemd noob. I can write unit files, which depend on a mount, because I can list them and then add to Requires=xxx, such as: # systemctl list-units | grep data mount-data.service ...
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0answers
103 views

How to add scripts for udev to run

I have several scripts i would like udev to run when a monitor is plugged/unplugged. I have added the extra udev rules, but i don't know how to add the scripts that i want udev to run. I have tried ...
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2answers
2k views

Suggestions needed for udev, udisks, autofs, notification setup for a complete automounting solution on Linux

Continuing on Automounting plugged devices in linux, which left things a bit basic. Running Gentoo, I'm automounting a combination of local and network devices on my laptop with autofs-5.0.4-r5. Doing ...
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0answers
157 views

debian wheezy extreme boot delay

I migrated from Arch to Debian(wheezy) recently. Since Debian was still using sysVinit, I migrated to systemd, but following this. The system booted after a long init, using fallback LSB scripts for ...
8
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1answer
2k views

reference whole disk (/dev/sda) using UUID

On my system (Debian), I can see the UUID identifier for all of my disks partitions (i.e. /dev/sda1, dev/sda2, ..) ls /dev/disk/by-uuid/ However, I don't see the UUID identifier for /dev/sda ...
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1answer
45 views

Stop interface name iteration?

I have a device that comes up as ttyACM0, however every time it is reset it iterates, so next time it will come up as ttyACM1 etc. Where might this lock be located so that I can remove it? I'd like ...
3
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1answer
555 views

cannot start chrome browser - bind failed: Permission denied

I am using grsecurity kernel with CONFIG_GRKERNSEC_SOCKET_SERVER enabled: [*] Socket restrictions [ ] Deny any sockets to group (NEW) [ ] Deny client sockets to group (NEW) [*] Deny ...
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3answers
7k views

Why do some Linux distributions still have /dev/ttyS0, ttyS1, etc., even though newer computers don't have such a serial port?

Many new laptop and desktop computers do not have 9-pin/25-pin serial ports. Why do many Linux distributions still contain /dev/ttyS0, dev/ttyS1 device files? Since udev can create the device files ...
2
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1answer
1k views

Change value of USB “max_sectors” for an entire family of devices

I've been using Linux for a while, but only since I started using "recent" distros (ie.: anything non-Debian) I have started having I/O problems with most of my USB devices. Basically when trying to ...
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1answer
1k views

how to find out if kernel or udev created a device node?

Is there any way to find out who created a device node? If it has been udev or the kernel itself? In the specific case of mine, I have two webcams. Nodes created for them are /dev/video0 and ...
7
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1answer
4k views

List all udev rules (e.g. for a device)?

I want to know how I can list all udev rules. I know that in they can be potentially stored as lines (one line = one rule) in *.rules files in these directories /etc/udev/rules.d /lib/udev/rules.d ...
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1answer
47 views

Why do I get mail when I unplug my adapter?

Usually I only get the terminal output You have new mail in /var/mail/$USER after running certain upgrades but I've started getting it every couple days after running other commands, seemingly at ...
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1answer
30 views

Pushing changes to driver repos

My understanding of dkms is that its a way to dynamically manage all connected/disconnected device drivers on a Linux system. If that's correct, then I have to imagine that it allows you to configure ...
4
votes
1answer
3k views

What's wrong with this udev rule?

I'm reading through this link in trying to make the appropriate rule to make the BSG device nodes have group ownership of wheel and permissions of 0660. This is the rule that I have: [user@mylinux ...
7
votes
2answers
31k views

Cloned Linux system and /etc/udev/rules.d/70-persistent-net.rules

I set up an Ubuntu system and configured it properly, including defining eth0 in /etc/network/interfaces. I then imaged that system and cloned it on a new system. When I booted up the system the ...
0
votes
1answer
83 views

Network card seems to be active but config file is missing?

I have a CentOS 7 virtual machine with an internal network as well as 2 bridged connections, I am unable to find the config file for the third network card. Any ideas where it could be? or what the ...
0
votes
1answer
92 views

many systemd-udevd spawns on embedded device

On my embedded device I observe a lot of systemd-udevd processes. Every few minutes a new systemd-udevd is spawning. At the same time a usb device (GSM Module) gets recognized and disconnect a few ...
2
votes
0answers
104 views

How to know when a device is ready

I have firewire mixing console and I wrote an udev rule which calls a script to set up the whole audio chain (alsa -> pulseaudio -> jackd -> firewire) as soon an the console is switched on. Now I ...
0
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1answer
811 views

Run a script that displays an X window from an udev rule

I found several questions on http://unix.stackexchange.com & on http://stackoverflow.com related to launch script by udev rules. But I can't find exact solution or certain answer for executing ...
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0answers
735 views

udev .rules not running script

I'd like my computer to run certain scripts when a specific keyboard is (1) plugged in, (2) plugged out, (3) detected at startup. Here's the device: [rob@X200 vim]$ lsusb | grep keyb Bus 005 Device ...
4
votes
1answer
1k views

lshw lists my drive but it has no /dev file

Ive just got a dedicated server which has 2x 1TB HDD. However when I type df -h I get the following: [root@sd-56537 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 916G ...
4
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1answer
1k views

Difference between /dev and /sys

Exactly what is the difference between devfs and sysfs? Both seem to maintain a list of hardwares attached to the system. Then why the need for 2 separate fs even arose? As far as I can get /sys ...
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0answers
168 views

What is the difference between HAL and udev?

As far as I understand, if I have 3 different network cards, then HAL will cal each of them eth0, eth1 and eth irrespective of their brands, manufacturerers etc. But it seems to me that udev precisely ...
8
votes
1answer
4k views

USB connect/disconnect notification

I use Linux Mint 13 MATE, and I'm trying to set up notifications when I plug/unplug devices. First of all, I found udev-notify package, but unfortunately it almost doesn't work for me: it works for ...
3
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0answers
92 views

Trouble getting USB printer to 'stick' using udevadm

What I’ve got so far $ udevadm info -a -p$(udevadm info --q path -n /dev/usb/lp1) | grep serial ATTRS{serial}=="544336460792090000" /etc/udev/rules.d/50-udev.rules: SUBSYSTEM=="usb", ...
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5answers
20k views

Ubuntu 13.04 does not recognize USB drive

Using Ubuntu 13.04 (with Gnome 3), my new USB stick (details see dmesg/lsusb) doesn't show up automatically. Situation: The drive does not show up at fdisk -l The drive does appear when running ...
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vote
1answer
184 views

UDEV Rule Not Triggering

I have gone through 10s of answers on this and other sites trying to debug my udev rule, but to no avail. The rule is very simple: I want to lock my screen when my Yubikey is unplugged. My rule is ...
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votes
0answers
30 views

serial port devices not found on bootup

I am running linux kernel 3.9.2 on my embedded device. I have this standalone program called usb_device_label.c, which checks for various USB devices connected and passes the information to main ...
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3answers
3k views

Are there alternatives to using `udev`?

While I understand the greatness of udev and appreciate the developers' effort, I was simply wondering if there is an alternative to it. For instance, I might imagine there should be a way to make ...
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0answers
230 views

udevadm trigger runs only one rule

I have 1294:1320 RISO KAGAKU device on F17. The problem is after sleep/resume hid reclaims this device back and its udev rule is ignored. If I unplug and plug in the device it is OK until next ...
3
votes
1answer
156 views

Udev RUN rule to run touch has no effect

I've created the file bellow $ cat /etc/udev/rules.d/10-tuned.rules SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_STATUS}=="Charging", RUN+="touch /home/fx/charg" SUBSYSTEM=="power_supply", ...
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0answers
185 views

/dev/disk/by-id creating wrong symlinks for harddrive

I'm running into an interesting problem where on reboots and power cycles, my harddrives will occasionally be given the wrong symlink in /dev/disk/by-id. For example, when I issue ls /dev/disk/by-id I ...
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vote
1answer
143 views

arch linux recognizes the partitions and hard disks wrongly

My arch Linux system does not recognize neither the partition nor the hard disk in which it is installed. it is installed on /dev/sdb1 but it recognizes that as /dev/sdc1 and the initialization goes ...
2
votes
1answer
277 views

Get ID and Mounted location of an USB

I need to find a way of retrieving the ID and Mounted Location for USB devices. I've found two commands that gives me what i want, but i haven't find how to associate them.. rsm@matrice:~$ lsusb Bus ...