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Questions tagged [devices]

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Recieved socket error when trying to connect 3D printer

I am trying to run a version of the EZT3D S2 foldable printer, similar to the artillery printers, there are lots of copies and "versions" of this printer under many names, from China, so it ...
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46 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 ...
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1 answer
64 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 ...
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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 ...
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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 ...
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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: ...
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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" ...
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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 /...
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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 ...
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2 votes
1 answer
103 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 ...
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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 ...
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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 ...
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1 answer
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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 ...
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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 ...
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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 ...
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I rebooted my server because the audio wasn't working and now I'm getting this error on when the server tries to boot

I rebooted my server because the audio wasn't working and now I'm getting this error on when the server tries to boot: /dev/mapper/ubuntu--vg-ubuntu--lv does not exist. Can someone please help me? I ...
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How to install Canon LBP6000 in Ubuntu 20.04?

I have tried most of the tutorials but none of those work. I can see my printer on CUPS and on Printers but am unable to print. Can someone guide me in the right direction?
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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 ...
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ubuntu 20.04 patch rt-preempt doesn't detect usb

I installed ubuntu 20.04 (kernel version 5.10.65) in dual boot with Windows and I installed the patch rt-preempt. I have some issues with the detection of the USB devices. I can see them in the ...
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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 ...
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When I try to program digispark attiny85 I get an error message at the last step

When I try to program digispark attiny85 I get an error message at the last step Please plug in the device ... Press CTRL+C to terminate the program. Device search timed out
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Can't seem to use my printer [duplicate]

I am trying to use my HP printer. First I plugged it in and it showed up as a printer but I couldn't print from it. I eventually used the sudo chmod +x ./hplip-3.21.6.run successfully writing over the ...
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2 answers
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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.
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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 ...
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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?...
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1 answer
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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 ...
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How to make Bluetooth RFCOMM device persistent across restarts

I am using an HC-06 bluetooth device to communicate from a peripheral to a Ubuntu 20 program using the PCs internal bluetooth device. The Bluetooth desktop manager has paired it. From terminal, I can ...
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1 vote
0 answers
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7 unclaimed devices in lshw output

I have seen some similar questions to this but I have never seen one with as many unclaimed devices in the lshw output, I am wondering if this is normal. I know that unclaimed means that there is no ...
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adb devices not showing up after update to hirsute hippo 21.04

I was running groovy gorilla and everything worked fine. Then after I upgraded to hirsute hippo 21.04 my phone (oneplus 7 pro) no longer shows up in adb. when running the command adb devices the ...
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6 votes
2 answers
4k views

How can I tell which of these video devices is a webcam?

$ ls -ltrh /dev/video* crw-rw----+ 1 root video 81, 1 Mai 4 00:17 /dev/video1 crw-rw----+ 1 root video 81, 0 Mai 4 00:17 /dev/video0 This is a laptop so I guess one is the built in camera, and one ...
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Installing Device Drivers for TP-Link TL-WN725N Wireless Adaptor

I have purchased a TP-Link TL-WN725N wireless adapter and require to install its device driver to get it working. After perusing the product information sheet, I see that my current version of the ...
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Raspberry PI 4+Ubuntu Mate works with IR remote shield?

I have already tested my IR remote shield in a Raspberry PI 3B and works ok (with Raspbian + Lirc). Now I want to make it run in my raspberry pi 4 with Ubuntu Mate installed. Here is my uname -a : ...
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understanding df -h output for use with dd

What do the different sda devices represent in this df -h output? Aren't /var /usr /opt all apart of / (the root directory)? Does this mean those directories are partitioned differently? -bash-3.2$ df ...
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USB Port recognition fails after some seconds

There are tons of posts around this topic but mine is somehow unique I found. PROBLEM Device 1: When plugging in any USB storage device like external hard drive, USB stick, card reader or phone, the ...
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3 answers
161 views

No gnome-desktop on the LAPTOP screen after connecting a second monitor(hdmi)

So two things occurred: I have recently near-nigh killed the system by deleting python3 (i had too many versions of it installed), but i did manage to reinstall it and the gnome-desktop since then ...
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1 answer
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how can I read from a USB device without knowing the device name?

I have an Arturia, MiniLab, it is a serial, non block device. I would like to read keypresses from the device, but I cant figure out where the /dev/device is that I should read key presses from. I ...
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External hard disk not mounted and not seen when plugged to Ubuntu

Suddenly Ubuntu stopped recognizing my external USB drive HDD, this is my dmesg output: [ 2341.271570] usb 2-2: new SuperSpeed Gen 1 USB device number 43 using xhci_hcd [ 2341.293118] usb 2-2: New USB ...
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1 vote
0 answers
470 views

External webcam device not found by some programs after upgrade to Ubuntu 20.04

Purely as the result of the upgrade from Ubuntu 16 to 20.04LTS, my external webcam is not found by some software any longer. Situation uname -r says 5.4.0-54-generic (so this answer should not apply) ...
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1 vote
1 answer
471 views

Refresh of udev rules directory does not work

I try to edit, remove and create rules in udev. For some reason, those rules are not activated, even when I try the known solutions- Udevadm control --reload-rules Udevadm trigger Just reset the the ...
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2 answers
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dev/ttyacm0 does not exist despite showing up in dmesg

I'm trying to run rosserial with a teensy 3.6, but am getting the following error [ERROR] [1603751770.005130]: Error opening serial: [Errno 2] could not open port /dev/ttyACM0: [Errno 2] No such file ...
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2 votes
2 answers
555 views

Block device full - how do I clear space

I'm a relatively basic user, using the Ubuntu terminal for Windows. I have a failing deployment caused by a lack of disk space on the VM I'm connected to in the terminal: df -h Filesystem Size ...
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2 votes
1 answer
466 views

What are the device numbers reported by lsof?

What are the device numbers reported by lsof? I read the man page, Identify devices from lsof, and this. Still I do not know what is its meaning. In particular, for this case, what can I infer from ...
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1 vote
1 answer
161 views

Grant writing permission to /snap devices

I installed blender with snap and I want the app to use blender's numix-circle-icon so I tried to replace /snap/blender/47/blender.svg but I have this error with sudo: File systeme is only readable I ...
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2 votes
1 answer
397 views

Problem with SD Card Read-only

I have problem with a SD card which is Read Only (it's not due to the switch of the card adapter, I've already checked). I format the SD card with 'Disks' but the card results to be as "Read-only&...
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Why are there so many audio output devices?

My system has multiple audio output devices avaible (built-in monitor speakers connected via display port, Corsair headset with USB receiver and speakers connected with aux). In my output devices, ...
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1 vote
1 answer
2k views

RTL8821CE device is not recognized

My computer does not recognize the network devices, right now I am using a network cable, but when I go to configuration / networks only the cable appears,it does not recognize any device, the drivers ...
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1 answer
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Can access WIndows partition in GUI but struggling through terminal

I have Windows and Ubuntu installed. I'm today cleaning up my home directory and noticed there is a downloaded file I want to move to my Windows partition. I don't want to use GUI. I know it works. ...
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6 votes
2 answers
2k views

What is the difference between Filesystem and "Extended Partition" in Disks?

I am struggling to understand the output from the "Disks" program. Here I see two different partitions, both pointing to the same disk space. One is devices /dev/sda3 (highlighted) and the other is /...
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Added RAM memory is not recognized : dmidecode shows no added new RAM info and free command does not increase the free size

Environment Info Ubuntu ver : Ubuntu 18.04.3 LTS Mother Board : SuperMicro C9X299-PG300F Initial RAM size : Total 16GB, one 16GB card at one slot RAM type : MTA16ATF2G64AZ-2G6E1 Current status I ...
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1 answer
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Missing ipmi Device (Remote Access Card) / ipmitool Failue: Could not open device at /dev/ipmi0 ... No such file or directory

I recently bought second-hand a HP Proliant N36L Microserver, and I'm having trouble configuring it for remote access on Ubuntu Server 20.04 LTS. It came with a HP Remote Access card, but when I try ...
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