Usb WiFi card dont work on ubuntu SERVER but woks on ubuntu DESKTOP

By Stach

Heyah 🙂
i will try make this as simple as possible.


1st PC – core i7 2600 and other stuff

2st PC – Old HP dc7900 (main subject of tests)
1st Wi-Fi card – TP LINK TL-WN722N
Bus 001 Device 002: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n

2nd Wi-Fi card – random, no name (???)
Bus 002 Device 002: ID 148f:7601 Ralink Technology, Corp. MT7601U Wireless Adapter


ubuntu SERVER 16.04 LTS ( – random USB 8gb )
ubuntu DESKTOP 16.04 LTS ( – random USB 8gb )


Can’t get my Wi-Fi cards to work on server versions of ubuntu on both PCS.
However during installation of ubuntu server or desktop it works FINE.

Also cards are working fine on installed version on ubuntu desktop

Cards are working properly on Raspberry Pi, Windows, and CentOS

Till now i tried:
Nothing yet…

Of course i can follow instructions here:
How to install driver for TP-Link TL-WN722N on Ubuntu 14.04?
But. Since it works on U-Desktop and during installation why cant it work on server ?

What Package i have to install ?

Please send help. Thanks.
Well… I can, live without WiFi… it just could make my project simpler.


Lock screen is not working Ubuntu 16.04

By Angel Sanchez

enter image description here

For five months I’m been working with this version and everything is working well. I use my laptop and another monithor, so recently my computer crash and after that when I lock my computer (CTRL + L) something strange occurs. One of my screen is completely black and the other screen shows the following image:


Wired Connection Not Connecting – RTL8111

By GisMofx

I’ve followed several threads and questions and seem to have found a few dead ends. I’ve got a fresh install and installed the most current Realtek drivers and used their script to remove the bad driver and install the new driver. No errors. I still have no connection after trying to tweak some config files. I’ve restored everything back to default.

What information can I provide to help resolve this(What commands from the terminal)?

What can I try to get connected?


ssh ops always ask for passphrase

By Gringo Suave

I just updated my ssh key and added a passphrase,
however it constantly nags me for it now,
such as when I do a git push. ssh-agent is running:

xxx  1303  1118  0 09:16 ?  00:00:00 /usr/bin/ssh-agent
   /usr/bin/dbus-launch --exit-with-session 
   /usr/bin/im-launch mate-session

I tried ssh-add:

> ssh-add
Identity added: /home/…/.ssh/id_rsa (/home/…/.ssh/id_rsa)
Enter passphrase for /home/…/.ssh/id_ed25519: 
Could not add identity "/home/…/.ssh/id_ed25519": 
    communication with agent failed

What is missing? 16.04, in case it matters.


Install windows on ubuntu laptop

By Prateek Agrawal

Ubuntu16.04 is installed on my laptop and now I want to remove ubuntu and install windows. I have windows iso file so I made a bootable usb pen drive using disk image burning feature on ubuntu. But when I am trying to boot from usb drive it shows that “installation media is invalid”
So how can I make a bootable usb drive of Windows on ubuntu?


Problem with Nvidia Privative drivers

By lordpu239

every time that I try to install nvidia privative drivers from the ubuntu’s system configuration, and i check the PRIME option in nvidia xserver to use intel drivers instead nvidia, when I reboot the screen goes black and the computer doesn’t turn off. My graphic card is Nvidia 940MX
Why happens this? Sorry for my english, I’m spanish.


Cheese webcam not loading

By Cici

I would be very grateful for advice please!

My Cheese Webcam has stopped loading. The following error message appears when “cheese” is typed into the terminal:

Gdk-WARNING **: The program ‘cheese’ received an X Window System error.
This probably reflects a bug in the program.

The error was ‘BadRequest (invalid request code or no such operation)’.

(Details: serial 146 error_code 1 request_code 155 minor_code 66)

(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the GDK_SYNCHRONIZE environment
variable to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error() function.)

My problem is that I have NO idea whatsoever as to how to use these instructions to debug the program. Would it be best to uninstall “cheese” and re-install a fresh version. Please advise.


Wifi not working on Ubuntu 16 running on Raspberry Pi 2

By Cerin

I have Ubuntu 16 running on a Raspberry Pi 2 with a USB wifi dongle. I have Network Manager installed, and I’ve registered by Wifi network with it. Running nmcli conn shows it’s connected and has received an IP address. However, I can’t ping any IPs or domains, with ping responding “Destination Host Unreachable”.

If I plug in an ethernet cable, I immediately get Internet back again. I’ve confirmed with other devices, that my Wifi router has Internet access. What would be causing this problem?

nmcli conn:

dd-wrt1             39d34wa4-a801-4ab6-a370-e466d2845c1e  802-11-wireless  wlan0  
eth0                1dr30878-1559-4b92-a26e-d964cdf41df5  802-3-ethernet   eth0   
Wired connection 1  d2936a80-cea5-4810-b5c0-53442527ee5b  802-3-ethernet   --  

cat /etc/network/interfaces:

auto lo
iface lo inet loopback