Udev is a Linux process that manages device file entries under /dev
2
votes
1answer
32 views
Re-ordering serial ports on a multiport card
I have a Red Hat Enterprise 6.2 machine with two on-board serial ports and a PCIe card with 8 additional serial ports (16C950 UARTs, 16C550 compliant). I've added the kernel option 8250.nr_uarts=10 so ...
2
votes
0answers
30 views
“PS/2 Generic Mouse” gets lost. How to reload without reboot?
I am running Ubuntu 12.04LTS on a ThinkPad E420s. My Trackpoint is recognized as "PS/2 Generic Mouse".
My problem is that it doesn't load/disappears after booting or after suspension. I can't move ...
3
votes
2answers
286 views
How to run long time process on Udev event?
I want to run a ppp connection when my USB modem is connected, so I use this udev rule:
ACTION=="add", SUBSYSTEM=="tty", ATTRS{idVendor}=="16d8",\
RUN+="/usr/local/bin/newPPP.sh $env{DEVNAME}"
...
2
votes
2answers
52 views
udev re-numbering when creating symlinks
I have USB cellular modem attached to an ALIX 3d2 board running voyage linux (which is based on Debian Squeeze). The modem registers itself as a TTY device, and so by default, udev will create TTY ...
1
vote
3answers
106 views
udev rule not working
I have created a udev rules which is supposed to mount a USB device, backup some datas et cleanup everything. I am actually working on a Debian server.
There is the information about my usb device ...
3
votes
2answers
437 views
Udev Rule file for Modem not working
I am using modem for sending sms which has 16 ( ttyUSB0 to ttyUSB15 ) ports. I want to make udev rule to give device name "AMPM" and ports should be name Port1, Port2,...Port16.
Check out this output ...
1
vote
3answers
68 views
udevd eats too many CPU cycles
It sits at around 64% CPU usage, but only because rsyslog is taking pretty much the rest of it (struggling to keep up).
I am getting these sorts of messages on /var/log/syslog:
Jun 5 23:59:38 vab ...
2
votes
2answers
572 views
Where is the official udev source and other dev information?
I'm trying to find a changelog or commit history for udevd, but I can't seem to find the official source. Where is that?
2
votes
1answer
122 views
Point USB phone to specific /dev/ttyACM using udev
We have a Nagios + check_mk setup on Ubuntu 12.04 LTS server with smstools for sending text message notifications. We are using an old Nokia 6230 phone connected by a USB cable, though I do not ...
2
votes
1answer
47 views
Where can I find documentation or source code for udev properties?
Specifically, I've been trying to find what the possible values are for the property UDISKS_PARTITION_FLAGS. It seems to be set to "boot" if the partition has the boot/active flag set, and unset if ...
1
vote
0answers
35 views
Udev rule- change group
I would like to change group of /dev/nvidia0. I was write udev rule:
KERNEL="nvidia[0-9]", GROUP="video", MODE="0666"
But it does't change group, after reboot file is in rootgroup. How do this?
1
vote
1answer
111 views
Udev rules involving X11 don't run on startup
I have some udev rules written to run when I connect certain usb devices. For example, I change pointer velocity for certain mice, and change xmodmaps for particular keyboards.
The scripts work well ...
4
votes
3answers
100 views
Watch USB connections vendor id, product id, revision
I'd like to simply watch all devices added and removed from my system and view their USB vendor ID, product ID, and revision and other relevant information. How can I do this in Linux? Is there a ...
3
votes
0answers
711 views
Udev triggers are not firing on insert of CF card into USB card reader (anymore)
I've got a udev rule that triggers a shell script that copies photos off my CF card when I insert the card into my USB card reader. This worked fine for a while. But after a recent upgrade it has ...
3
votes
1answer
82 views
udev: How do you identify the physical device that a sys device belongs to?
I have several USB modems that each have several endpoints: lot of TTYs, a network interface, a cdc-wdm port, and some other things. I'm trying to group them together so that I know, for instance, ...
1
vote
3answers
169 views
Restarting udev on centos6 (tethering a mobile phone using proxoid)
I am trying to use proxoid (a proxy server to allow tethering like facility for mobile phones). The https://code.google.com/p/proxoid/wiki/installationLinux says that I need to restart the process ...
2
votes
0answers
45 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 ...
1
vote
0answers
158 views
udev rule for usb attach/detach not triggering
I'm running RHEL6 and I'm trying to write a udev rule that is triggered upon plugging in and removing usb devices. I created a file called 80-usb.rules in /etc/udev/rules.d/ and I gave it the ...
3
votes
1answer
57 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
votes
1answer
141 views
Why doesn't this udev rule trigger upon removal of the device?
I have two mice, one which has an issue where the middle mouse button and button6 get triggered simultaneously. So I configured my ~/.Xmodmap to disable this button. At the same time, however, I ...
1
vote
1answer
132 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 ...
0
votes
1answer
280 views
Fixed udev rules for USB modems
On gentoo i have 10 USB modems and every of them has 3 interfaces /dev/ttyUSB0, 1, 2 and so on for each modem. Sometimes their postitions can change, so it is very difficult to work with them.
I'm ...
2
votes
2answers
621 views
Network naming on Arch Linux
I've just installed Arch Linux on my old PC, to do the installation I used wifi-menu wlan0, now I've reboot but if I type:
ifconfig wlan0 up
I have as a result:
wlan0: ERROR while getting ...
2
votes
1answer
102 views
What is the udev rule to allow specific thumb drive vendors?
How can I write a udev rule that whitelists specific vendors and doesn't allow other USB drives? Do I put it in /etc/udev/rules.d, or /lib/udev/rules.d? What command do I run to test if the rule is ...
2
votes
1answer
65 views
How to list all present optical drivers?
How can I list all the installed optical drivers with udev or any other core-based tool (perl is also very good) ?
P.S.: I know about the wodim --devices command, but it's an undesirable ...
2
votes
1answer
240 views
How to execute a shellscript when I plug-in a USB-device
I want to execute a script when I plug in a device in my Linux machine. For example, run xinput on mouse or a backupscript on a certain drive.
I have seen a lot of articles on this, most recently ...
2
votes
2answers
110 views
Why doesn't xsetwacom work from udev?
I made a script to rotate my Wacom Bamboo tablet 180 degrees. It works fine when I execute it as myself (user) or root, but when started from udev (i.e. when plugging the tablet into a usb port) it ...
1
vote
0answers
76 views
How to resume the ?WATCH command when a USB GPS is reconnected
I have some hacks to ensure that my USB GPS devices continues spitting data if disconnected, then reconnected. The devices are so flaky that they need restarting so as to continue transmitting data.
...
2
votes
1answer
100 views
Enable udev and speex support for pulseaudio
I tried to install pulse audio, but after running ./configure I got a warning message:
===== WARNING WARNING WARNING WARNING WARNING WARNING WARNING =====
You do not have udev support enabled. It is ...
3
votes
2answers
2k 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 ...
1
vote
1answer
1k views
PuTTY can access serial port as /dev/ttyUSB0, but not as named udev device
I have multiple USB-to-serial converters. I need to access one of them in particular. I'm using a udev rule to give it a special name. I have rebooted since I last modified it.
SUBSYSTEM=="usb", ...
13
votes
3answers
8k views
How to reload udev rules without reboot?
How should one reload udev rules, so that newly created one can function?
I'm running Arch Linux, and I don't have a udevstart command here.
Also checked /etc/rc.d, no udev service there.
4
votes
2answers
1k views
udev rules don't appear to be working
I'm running Arch Linux on my server, and I need to let users of the group usb access my weather station.
Here's my rule:
/etc/udev/rules.d/usb-70.rules
SYSFS {idVendor} == "1941", SYSFS {idProduct} ...
2
votes
0answers
107 views
What is the correct way to write a udev rule to stop a service under systemd
I'm running Arch Linux, and I have a udev rule which starts a service when a device is inserted. In this case, it dials a connection when a 3G modem is plugged in.
KERNEL=="ttyUSB*", ...
3
votes
1answer
106 views
Removing device from USB hub triggers udev event for removing hub
I have a udev rule to halt the system when a usb hub is removed:
SUBSYSTEM=="usb", ACTION=="remove", ENV{ID_VENDOR_ID}="050d", ENV{ID_MODEL_ID}="0237", RUN+="/sbin/halt"
Unfortunately, this also ...
1
vote
0answers
188 views
Why do I not seem to have hidraw options on my system, and how can I fix my usb devices?
Starting today, I noticed a few problems with my system. USB devices, including the internal ones such as microphones, don't seem to be working at all. I first noticed when my keyboard and mouse ...
2
votes
0answers
166 views
Failed to execute shell script from “network” udev rule to change the MAC-address
I am trying to execute a shell script from udev rule, when a network interface is added, as follows:
SUBSYSTEM=="net", ACTION=="add", KERNEL=="eth*", PROGRAM="/usr/local/bin/changemac.sh", ...
1
vote
1answer
186 views
Reserve Ports for modem
I have a modem with 16 ports using for sending SMS.
When it's connected to my Linux machine, I get 16 ports from ttyUSB0 to ttyUSB15. Currently if I remove this modem and attached another it,I get it ...
26
votes
4answers
3k views
How can I detect when a monitor is plugged in or unplugged?
Is there any event that is triggered when I plug in or out an external monitor into the DisplayPort of my laptop? ACPID and UDEV don't react at all.
I'm using onboard graphics on an intel chip. Here ...
9
votes
3answers
931 views
Fake serial number of USB device
I have a mobile phone connected to my PC via USB.
When viewing the device info using
sudo udevadm info --attribute-walk
the product and vendor id's show up fine, but there is no ATTR{serial}. An ...
0
votes
0answers
75 views
Prevent udevd from inspecting this device?
I think this error message was from my usb mouse, how could I know that?
systemd-udevd[225]: error opening ATTR{/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/power/control} for ...
2
votes
0answers
85 views
Can a FAT32 and NTFS file system exist without UUID?
I have an USB disk drive partioned with 2 FAT32 partitions, which is not getting detected in the embedded device, but gets detected in a Fedora system.
Basically in the udev rules, I am not able to ...
1
vote
2answers
196 views
RHEL 5.5 - Need to refresh /dev/disk/by-label links
I've added a fibrechannel disk to a RHEL 5.5 server. The disk is present and shows under /dev/sdxx - But I need to give udev a kick and have it refresh the /dev/disk/by-label/LABEL links; this is ...
3
votes
1answer
470 views
FUSE : Allow any user in the fuse group to unmount
I'm currently trying to write a couple of systemd/udev configuration files that will allow me to automount/unmount MTP Android devices on my Archlinux laptop. It took me some time, but so far it works ...
4
votes
1answer
256 views
How does udev create /dev/sr*? (Or: Which rule does create /dev/sr*?)
udev is responsible for populating /dev. It adds and removes device nodes to /dev dynamically based on rules/configs/scripts under /lib/udev and /etc/udev/.
If I have a CDROM device node /dev/sr0 I ...
2
votes
2answers
1k views
building my own initrd, how to populate dev directory
I am trying to learn stuff about initrd. I have followed this tutorial to build my own initrd from scratch, and I installed busybox on it. Then I made an .iso from it with isolinux, so I could test it ...
4
votes
4answers
2k views
UDEV rule when USB flash drive is unplugged
I wrote a rule to automount my USB stick to certain folder
but when I unplug it the folder still mounted and when I ls there
I see a lot of errors like: Directory bread (block: NNNN) failed
I tried ...
16
votes
5answers
4k views
A tool for automatically applying RandR configuration when external display is plugged in
is there a tool which enables one to:
remember current RandR configuration (position, orientation, resolution etc) on per-monitor basis,
automatically apply last known good configuration as soon as ...
3
votes
0answers
509 views
Problems copying large files to USB drive
I've got some issues when copying larger files to my USB drive. First of all, my system stopped recognizing my USB drives automatically. I now have to run modprobe usb-storage in order for my USB ...
1
vote
1answer
438 views
Network Interface Names output from ifconfig
So this has been driving me nuts for a good couple of hours, so I thought I'd ask about it here (let me know if there's a better forum for this question).
I have a CentOS Virtual Machine on ESXi. I ...
