Questions tagged [devices]

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How can I turn off a USB Lamp in Ubuntu?

I bought a USB lamp that I want to turn ON/OFF using commands (my purpose is to setup some CRON jobs to turn it ON at certain times). I researched several answers, but none worked. I tried outputting ...
Chris Vilches's user avatar
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0 answers
8 views

Audio Devise Selection Dialogue Stopped Working on Ubuntu 22.04.3

While there are a ton of questions (all well answered) about the exact opposite -- i.e. how to get rid of the audio device selection dialogue box when plugging in a new audio device -- I have lost ...
natS's user avatar
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1 answer
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What is the point of creating a symlink in /dev direcory?

I understand that you can write custom udev rules to create a symlink in /dev directory. Wondering what having a symlink in /dev accomplishes? What is the symlink linking to? ACTION=="add", ...
Dr. Chocolate's user avatar
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1 answer
52 views

Ubuntu 22 'lost' all devices after morning boot; lspci still shows them; not a HW issue, because Live DVD loads correctly

EDIT: Suspicious log entries are added at the end of the post. NOTE: this is NOT a hardware problem. I booted up an Ubuntu installation media, all the devices work as they should. I would like to get ...
Alex Smirnoff's user avatar
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107 views

no input device is detected ubuntu 22.04 - no microphone is detected

I just installed ubuntu 22.04 and i'm facing an issue is that there is no input device detected . i tried to use pavucontrol but it doesn't work : lspci -knn | grep Audio -A3 01:00.1 Audio device [...
iliass.iliass's user avatar
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0 answers
49 views

snd-hda-intel only showing up one audio output device (HMDI) also no input device

So I added snd-hda-intel option to alsa-base.conf options snd-hda-intel model=generic but I'm only getting one output device which is the HDMI. The actual motherboard audio card is not working, ...
gdoublee23's user avatar
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1 answer
43 views

Pre-define device number (/dev/video)

having some capture device, it listed with lsusb Bus 002 Device 002: ID 32ed:3200 ezcap ezcap CAM LINK 4K but its device value changes from time to time, so I need to change cap (j) /dev/video pretty ...
Jack3n's user avatar
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54 views

USB device is not authorized for usage when connecting the device

I have Ubuntu 20.04 running on a Dell-XPS-15. When I restart my computer, my USB devices are detected and everything is fine. Then if I unplug the device and plug it in again - it is not recognized ...
Mickey's user avatar
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0 answers
35 views

Remoting a 3D printer using netcat or socat

I have my 3D printer at my lab in the basement, where I also have my Ubuntu (desktop) fileserver; in order to not overload it, I would like to avoid the simplest solution that's run Cura on fileserver ...
MarKo ZaKka's user avatar
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46 views

A question about udevadm trigger for power-switch

I use ubuntu 20.04. Today my computer shut down automatically twice. I entered 'journalctl' for checking and got the result 'systemd-logind[761]: Power key pressed.' I googled this result and found ...
whyamiruning's user avatar
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Main sound device disappears in "jack" plug

I have a laptop with "jack" audio output. When I plug my headphones in, I expect to have two sound device - main laptop speaker and headphones, any of which I can select in my settings. But ...
Yaroslav B's user avatar
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31 views

Xserver "reloads" input devices after system startup. How to debug?

I am attempting to figure out why many (10+) input devices (most importantly, my touchpad) are being needlessly loaded a second time and overwriting user-defined settings with default values. Here is ...
Niko Senkov's user avatar
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33 views

No output devices in sound Setting

I connected my Bluetooth speakers to the computer, but it does not appear in output devices in sound settings, so that it's connected, but the sound still uses the computer speakers. my output devices:...
Muhammad Tawil's user avatar
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0 answers
908 views

How to fix '* failed to start daemon error: cannot connect to daemon' on Linux ubuntu

I had to install the adb tools on my Linux ubuntu with the command line but when I execute the command adb devices, I have this return in my terminal : uriel@uriel-linux-ubuntu:~$ adb devices List of ...
Uriel's user avatar
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3 votes
1 answer
1k views

Who/what is creating /dev/loop0, /dev/loop1, ... /dev/loop7?

I've recently been working on a project requiring encrypted files mounted via a connection to a loop device. While the project will run on an Ubuntu system, I was experimenting with setting it up on ...
pgoetz's user avatar
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20 views

Assign /dev/sr0 to external optical drive

I have a piece of software that I can't alter that looks for a disc in /dev/sr0. That device is the integrated dvd drive in my computer, which has become inoperable. However, it still shows up as /dev/...
Keyslinger's user avatar
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640 views

How to install netgear AC1200 (model A6150), wifi dongle

I am trying to install my new netgear wifi usb dongle AC1200 (A6150) on my Kubuntu 20.04. More specifically my system setup: mainline 1.0.18 Distribution: Ubuntu 20.04.5 LTS Architecture: amd64 ...
Alessio_110's user avatar
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0 answers
322 views

removing device from device list linux

i am working on a project and after some time i stumble upon the next error: Unable to get name for joystick /dev/input/js0 Failed to get vendor ID of joystick /dev/input/js0 Failed to get product ID ...
C0sM1n's user avatar
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53 views

Viewing digital camera files in Dolphin

I'm trying to view the files on my Canon camera over a USB connection. The camera shows up in lsusb. but not in Dolphin's list of devices. When I first plug it in I get a window offering to connect ...
Paul A.'s user avatar
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68 views

Create duplicate link for /dev/mapper devices - Consequences

I have an Ubuntu 18.04 server that is not able to perform "sudo apt upgrade" at the moment. It is receiving this message whenever we try to update any packages: /usr/sbin/grub-probe: error: ...
S. Nixon's user avatar
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0 answers
70 views

What is a 'Linux Text Console', really?

What dev or resource in Linux actually constitutes being a 'console'? I have a little, home, Linux box server that I usually SSH into. I connected a TV to an HDMI output and wanted to 'startx' on it. ...
Ribo's user avatar
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1 vote
0 answers
41 views

How to consistently idenfity USB devices with udev

I have a udev rule for a USB cable with 2 serial ports that successfully matches ttyUSBx to /dev/ttyUCx KERNEL=="ttyUSB*", SUBSYSTEM=="tty", SUBSYSTEMS=="usb", ATTRS{...
T Horvitz's user avatar
1 vote
0 answers
34 views

How to build a livecd without dev entry points for local hard drives

I'm trying to create a bootable USB key with "livecd" lubuntu distribution (lubuntu-22.04.1-desktop-amd64) for a specific purpose: a restricted OS for students examinations. I'm almost done ...
evae-pol's user avatar
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0 answers
112 views

Linux Kernal 5.15.0-50 PCI device enumeration diff. from 0-48

I've been using Ubuntu on a Dell laptop successfully for some time but yesterday when booting the OS seemed to fail to enumerate all the devices. The symptoms were that the Wi-Fi module, the track ...
Arthur Mitchell's user avatar
0 votes
1 answer
402 views

How to disable 'Select Audio Device' popup when plugging in a device

I have been on Ubuntu 22.04 for a while now but suddenly I got a OSD popup that gives me an option to select audio input device every time I plug in a audio device. I've seen ways to disable thins ...
Betzalel Maor's user avatar
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0 answers
88 views

Ubuntu 22.04 Bluetooth showed No Bluetooth Found Plug in a dongle to use bluetooth

I have been using Ubuntu 22.04 for almost 2 months now I regularly have my Bluetooth speaker connect to it every time but some how yesterday it I can not turn on my Bluetooth for a speaker but the ...
WIsh Suharitdamrong's user avatar
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0 answers
1k views

SD Card Reader dissapears on fresh Ubuntu 22.04 install

I just installed Ubuntu 22.04 on a Dell Precision 7750 laptop. In the process of transferring software and files, the SD card was producing errors when unmounting and working unreliable. I will ...
Camilo Rada's user avatar
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0 answers
1k views

Change device path (/dev/sda) of internal hard drive

On my Ubuntu 22.04 have an internal hard drive connected via SATA. It shows as /dev/sda. As I am working with various external drives such as SD cards and USB sticks, and writing scripts to format and ...
Janos's user avatar
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2 votes
1 answer
549 views

What is difference between /dev/vcs, /dev/vcsu and /dev/vcsa? Why are there so many of them?

I know about vcs and vcsa by reading this but I find nothing regarding vcsu.
Life rocks's user avatar
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0 answers
211 views

My Ubuntu 20.04 spits out "logger: socket /dev/log: No such file or directory"

I'm a newbie to Ubuntu. I am trying to run a script that needs access to /dev/log when the following error occurred "logger: socket /dev/log: No such file or directory". Any ideas on how to ...
Charles's user avatar
1 vote
1 answer
3k views

NVIDIA device doesn't exist!

I posted this question a few days ago. I tried to reinstall the driver by downloading it from official NVIDIA website and also reinstalling it from Additional Driver app or ubuntu-driver autoinstall ...
Mohammad Mahdi's user avatar
0 votes
1 answer
2k views

Listing device in /dev/ path

I have been trying for several days to get my ESP32 to show in /dev/ttyUSB* I cannot get it to show at all I am running ubuntu If I do lsusb I get Bus 001 Device 006: ID 1a86:55d4 QinHeng Electronics ...
DottoreM's user avatar
  • 103
0 votes
1 answer
749 views

Ubuntu sometimes fails to recognise network card on wake from suspend

Issue Sometimes, when I wake my computer from a suspended state, it fails to connect to the Wi-Fi and it appears that my computer fails to recognise my network card. Update 2022-05-25: This has ...
08915bfe02's user avatar
0 votes
1 answer
740 views

What is /sys/bus/pci/devices/0000\:01\:00.0/?

Recently I had a problem with the fan working all the time. Someone suggested to use powertop --auto-tune or to write auto into /sys/bus/pci/devices/0000\:01\:00.0/power/control My question is: What ...
aviv's user avatar
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1 vote
1 answer
980 views

Problems with USB in Ubuntu 20.04

After update from Ubuntu 18.04 (where everything worked correctly) to Ubuntu 20.04 I have a problem with USB: 08:59:20 kernel: usb 1-3: 2:1: cannot get freq at ep 0x1 08:59:20 kernel: usb 1-3: 2:1: ...
Kris's user avatar
  • 21
0 votes
3 answers
122 views

Check if a "string" is an existing device name and not a partition name

For example if I have an existing device variable /dev/sda, I want to verify that it is not the name of a partition but of the entire disk. I have tried this: [[ $(df --output=source "$var" ...
Mario Palumbo's user avatar
0 votes
1 answer
158 views

Unmount volume, and dependent mounts

I explain: Currently I have: A volume mounted to a directory, /mountDirectory And I also have a local directory that has a mount bind to a directory on the volume: /localDirectory mount bind /...
Anastasia Oxenyuk's user avatar
2 votes
0 answers
174 views

No bootable device found on new laptop

I hope you are well, I have a problem that I personally can't figure out, here I am using a Dell Inspiron 6450 computer in which I have installed Ubuntu 20.04 as the operating system. I have a new HP ...
joker-code's user avatar
2 votes
1 answer
892 views

lspci shows devices without names, but it did on other OS version with the same kernel

I found out after installation Kubuntu 20.04 with kernel 5.13 that lspci can't identify devices. Now it looks so: $ lspci 0:00.0 Host bridge: Intel Corporation Device 9a14 (rev 01) 00:02.0 VGA ...
kvdm.dev's user avatar
1 vote
1 answer
510 views

What is the proper way to edit files in the /sys filesystem and have them stick

I was able to get my BlueTooth mouse to stop lagging with the command: echo 300 > /sys/devices/pci0000:00/0000:00:14.0/usb1/1-14/power/autosuspend However, I believe that this change will be lost ...
X Naterion's user avatar
0 votes
1 answer
385 views

Audio output device missing + Test Audio broken after installing Microsoft Teams

After installing Microsoft Teams Version 1.4.00.26453 (64-bit) on Ubuntu 20.04.3, my audio output device goes missing from the Sound menu of System Settings. I'm using a Schiit Fulla 3 DAC/Amp. I was ...
AWSM's user avatar
  • 11
2 votes
1 answer
1k views

Browsers can't detect my webcam but it works in cheese

Suddenly, my webcam stopped working in my browsers even though it works if I run the cheese application in the terminal. I am testing it with this website (and many others) on Google Chrome (incognito ...
tail's user avatar
  • 121
1 vote
1 answer
742 views

How can I merge 2 devices to extend my root partition

My root partition is almost full, and I don't have much space in root device /dev/sda5. I have another device which has space. The device is /dev/sdb1 I want to merge the devices to use the space ...
Muhammad Tariq's user avatar
1 vote
0 answers
184 views

How to use external bluetooth (TP-Link) in laptop rather than inbuilt one?

I have a TP-Link Bluetooth 5.0 USB that I want to use with my laptop rather than the inbuilt one. I'm using ubuntu 20.04. I switched from windows to ubuntu and was using TP-link Bluetooth 5.0 rather ...
Micky_Pathania's user avatar
0 votes
1 answer
783 views

HP EliteBook 840 G3 Audio No Device

This is a fesh installation on a HP Elitebook 840-G3. Operating System: Kubuntu 20.04 KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 Kernel Version: 5.11.0-41-generic OS ...
kbmubuntu's user avatar
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0 answers
479 views

Major number 259 on Ubuntu 20.04.3 LTS

If I execute lsblk -p command, the following is the output : NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT /dev/loop0 7:0 0 99,4M 1 loop /snap/core/11606 /dev/loop1 7:1 ...
Satria Janaka's user avatar
1 vote
2 answers
538 views

What does the “sd” in “/dev/sdX” stand for?

It seems like the answer might be “SCSI Device” from this thread: differences between hda to sd0. I have been searching for a more concrete link.
Ari Sweedler's user avatar
0 votes
0 answers
912 views

Is there a version of XCODE available for linux?

I am a user of Ubuntu-Budgie cuz i really like its Mac like interface. Recently I've started my development career in Flutter. I have set up an Android Emulator on my device for testing purpose but i ...
Vasudeva S's user avatar
0 votes
0 answers
25 views

How to make mounting a certain device read-only? [duplicate]

When I connect my camera to my Xubuntu 18.04 computer, it's mounted with write permissions, which isn't exactly desirable. How can I make it so that it, and any other camera, will be mounted read-only?...
Xutulu's user avatar
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1 vote
1 answer
299 views

How do I read raw input from a USB device's buttons and translate that into keypresses?

I've been trying to figure out the best way to interface the buttons and a touch strip on a Huion Kamvas 12 graphics tablet with my ubuntu installation. Whilst I was able to get the pen to work with ...
Leethom's user avatar
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