Linked Questions

84 votes
14 answers

Ubuntu 20.04 bluetooth not working

I've installed Ubuntu 20.04 and bluetooth is not working for me. But it works in a live session if I boot that from USB. Can anyone help me please? systemctl | grep -i blue output: sys-devices-...
la_sk's user avatar
  • 869
25 votes
6 answers

How can I disable USB autosuspend for a specific device?

This is related to the issue discussed in Wireless mouse temporarily freezes (sleeps) on battery power. Summary: the mouse freezes when operating on battery since it is autosuspended after a certain ...
black_puppydog's user avatar
35 votes
3 answers

How to disable auto power off of usb devices like usb mouse?

I don't know how , but somehow automatic power-off of usb devices got accidentally enabled. Now my usb mouse goes off even if it's idle for 2-3 seconds. It's really irritating. This happened after I ...
rrj's user avatar
  • 381
18 votes
4 answers

Two USB ports stopped working

I have a HP pavillion g6, running Xubuntu 14.04 64-bit. I have 3 USB ports. For some reason, 2 of them stopped working this morning. I have xserver-xorg-input-all installed, followed the instructions ...
Lynob's user avatar
  • 6,615
6 votes
3 answers

How to fix USB mouse and keyboard freezing?

My wired mouse, wireless mouse, a wired keyboard - all over USB - are freezing every once in a while for a few seconds. Nothing shows up in the logs when this happens and the laptops touchpad and ...
Vadim Peretokin's user avatar
3 votes
2 answers

Disabling USB sleep mode

I have installed a full Ubuntu on a USB flash drive. Every time I want to boot into Ubuntu, I just plug the USB drive in and it boots into Ubuntu, and everything works just fine. There is one problem, ...
user avatar
1 vote
0 answers

The right way to configure USB power in ubuntu

echo on | sudo tee /sys/bus/usb/devices/*/power/level > /dev/null The command above is used to keep USB power on (Turns off USB power-saving). I execute the command every time I log in to Ubuntu ...
Manar Zaboub's user avatar
3 votes
1 answer

USB Switch Not Working in Ubuntu 18.04 or 20.04

I have a USB switch with a keyboard and mouse plugged into it. It works fine on my Windows machines. When I boot into Ubuntu with the switch connected to the Ubuntu machine and the Ubuntu machine ...
plafratt's user avatar
  • 131
2 votes
1 answer

Ch340 keeps disconnecting

I recently bought a esp32 devkit with ch340 USB-UART bridge. After plugging it into the USB port of my Ubuntu 22.04 the serial port /dev/ttyUSB0 repeatedly connects and disconnects. Also, I have tried ...
Macuilxochitl's user avatar
2 votes
0 answers

MIDI device (Yamaha electric piano) cuts out after about 15 seconds

I'm running Kubuntu 18.04 on an HP Pavilion with Ubuntu Studio installed, connected via USB to a Yamaha electric piano. When I start either Rosegarden or aplaymidi on a MIDI file, the sound emerges ...
Paul A.'s user avatar
  • 2,093