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Questions tagged [16.04]

Sixth LTS (Long Term Support) release of Ubuntu, code-named "Xenial Xerus". Released on 21st April, 2016. Reached End of Standard Support (ESM) on April 30, 2021. Questions specific to 16.04 are no longer supported here and are supposed to be closed as off-topic.

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13
votes
4answers
39k views

Unable to mount Windows 10 partition; it “is in an unsafe state” [duplicate]

I have both Ubuntu 16.04 LTS and Windows 10 Pro installed and I use them both very often. Sometimes, when using Ubuntu, I can see and use Windows partitions also. But sometimes, I cannot. I dont know ...
34
votes
3answers
43k views

System freezes completely with Intel Bay Trail

My system freezes completely at random, frequent intervals. I started to have the same problem in Ubuntu 14.04 but after recent upgrade to 16.04 there is no improvement, in fact it seems worse. When ...
85
votes
12answers
249k views

16.04 new installation gives grub-efi-amd64-signed failed installation /target/ ubuntu 16.04 at the end

I am installing Ubuntu 16.04 in an Intel NUC computer with UEFI enabled. I am using an SSD from another computer. During the installation I chose Erase the disk and make a new full install At the end ...
37
votes
4answers
9k views

TTY doesn't wait for password

I upgraded from 16.04 to 18.04. When I press Ctrl+Alt+F3 I get the terminal which prompts for the username. When I type my username and press Enter, it doesn't wait for my password (its as if I ...
151
votes
8answers
216k views

Could not load 'vboxdrv' after upgrade to Ubuntu 16.04 (and I want to keep secure boot)

I upgrade from Ubuntu 15.10 to 16.04 and since then VirtualBox 5.0.18 isn't starting my VMs anymore. It complains that 'vboxdrv' isn't loaded. So I try to load it and get the following error: $ sudo ...
3
votes
3answers
7k views

Touchpad gestures and holding keys does not work

I am facing very weird problem on which I cannot find solution. One time touchpad gestures stopped working along with keyboard keys holding. Touchpad is moving the cursor but nothing more. When I am ...
41
votes
3answers
30k views

GUI/Unity crashing in 16.04 LTS after updates 2018-01-04, compiz segfaults

The latest updates (4/1/2018) make my laptop constantly crash the GUI/Unity: (Intel Pentium su4100 processor) syslog: Jan 5 11:38:53 1810 kernel: [ 1850.327738] compiz[11911]: segfault at 0 ip ...
50
votes
3answers
29k views

Small snap loop devices visible in gnome-disk-utility OR what is the function of snap ubuntu-core

I just realized using gnome-disk-utility (3.18.3.1) that my 16.04 installation is featuring several small loop devices. In detail: 78 MB Loop Device (/var/lib/snapd/sn_ntu-core_352.snap -> /dev/...
163
votes
12answers
135k views

Wifi doesn't work after suspend after 16.04 upgrade

This particular version of the "doesn't work after suspend" came after upgrading to 16.04. It seems that the upgrade includes a Wicd applet (added to Metacity Classic Gnome task bar alongside regular ...
134
votes
10answers
209k views

16.04 upgrade broke mysql-server

My overall upgrade went well, but I am left with a critically lingering issue of mysql-server not being able to install itself, and nothing I am trying gets it to work. This is the error I see when ...
111
votes
11answers
204k views

How can I hibernate on Ubuntu 16.04?

How should I successfully hibernate Ubuntu 16.04? I've tried almost every solution on the web but non of them was actually helpful. I found my problem almost completely similar to this one
51
votes
3answers
42k views

Ubuntu 16.04 slow boot (apt-daily.service)

My boot is horribly slow, and I don't know why. $ systemd-analyze Startup finished in 10.975s (kernel) + 49.732s (userspace) = 1min 708ms $ systemd-analyze blame 34.971s apt-daily.service ...
103
votes
10answers
213k views

Steam not opening in Ubuntu 16.04 LTS

I have never used Ubuntu or any other Linux OS before last Friday. For all I know, I might have installed Ubuntu wrong and be missing a component. I would prefer if you use simplest terminology ...
46
votes
4answers
320k views

How to start Ubuntu in Console mode

I want to know if there is a way to switch to console mode from the boot menu. I have an NVIDIA 1070 and every time there is an update, the GUI stops working. All I need to do is re-install the ...
21
votes
4answers
8k views

2/15/18 compiz update broke unity

This compiz update forced removal of unity and ubuntu-desktop on my 16.04 Ubuntu system. The offending package that is missing, but unity needs, seems to be compiz-core-abiversion-20151010. It seems ...
123
votes
9answers
396k views

16.04 LTS wifi connection issues with Realtek RTL8723BE adapter

I discovered several issues with wifi connection after installing 16.04 LTS. First, wifi doesn't reconnect normally after sleep or hibernation. Sometimes the network icon turns into a "up and down ...
96
votes
6answers
179k views

Ubuntu 15.10 and 16.04 keep freezing randomly

This issue i had it with 15.10 and it's still here after the 16.04 upgrade. The whole system freezes, no keyboard/mouse input works anymore. I tried a variety of keyboard combinations (found on the ...
24
votes
2answers
34k views

How to install Ubuntu 14.04/16.04 64-bit with a dual-boot RAID 1 partition on an UEFI/GPT system?

Update: Question and answer below also applies to Ubuntu 16.04 I have a computer with dual SSDs and Win (7) pre-installed on another disk. The pre-installation uses (U)EFI/GPT boot. I want to install ...
12
votes
3answers
22k views

How do I make a persistent live USB of Ubuntu 16.04?

I need the persistent live Ubuntu of preferably 16.04 because I need to rescue my whole encrypted HDD of 16.04 as discussed in the thread How do I add myself back in sudo group in Encrypted HDD of 16....
44
votes
5answers
34k views

Gnome terminal will not start

I just tried to install python 3.6 on my Ubuntu 16.04 system, and now I can't run the terminal from the launcher or from Ctrl + Alt + T. I tried to run gnome-terminal from XTerm and got the following ...
103
votes
9answers
289k views

Ubuntu 16.04 hangs on shutdown/restart

My Ubuntu 16.04 hangs on shutdown/restart requiring me to press and hold the power key to turn the machine off... I don't know how to report this as a bug and what commands to run to show the ...
43
votes
2answers
93k views

How do I upgrade from 14.04 LTS to 16.04.1 LTS?

So, today is July 21st and this page. gives me an option to download 16.04.1 LTS. However, attempting to upgrade gets me this message - $ sudo do-release-upgrade Checking for a new Ubuntu release No ...
25
votes
10answers
108k views

The new software center in Ubuntu 16.04 shows no application data found

This is the error I get when I open the software center. I've tried rebooting and running sudo apt-get update but I see no improvement. It worked earlier but I don't know what went wrong since then. I'...
180
votes
4answers
564k views

How can I downgrade from PHP 7 to PHP 5.6 on Ubuntu 16.04? [duplicate]

I am trying to revert my PHP version to 5.6 from 7 and though I removed PHP 7 and then installed PHP 5.6 I still seem to be running version 7. Is there a simple method for moving through PHP versions ...
68
votes
3answers
202k views

PCIe Bus error severity=Corrected

I have a new HP Pavilion Gaming Notebook and a new installation of Ubuntu 16.04. When I press Ctrl + Alt + F1 I go start seeing the errors shown in the following image and it doesn't allow me to ...
32
votes
8answers
64k views

ModuleNotFoundError: No module named 'apt_pkg' error

I run below command on ubuntu 16.4 : sudo add-apt-repository ppa:noobslab/apps of below question: How to install PlayOnLinux on Ubuntu 16.04 and get below error: Traceback (most recent call last):...
2
votes
1answer
3k views

When does Ubuntu 16.04 use /etc/apache2/ssl/apache.crt?

I have some Ubuntu 16.04 server running and set up one vhost in apache2 which uses (or should use) ssl. <IfModule mod_ssl.c> <VirtualHost *:443> ServerAdmin myemail@...
99
votes
13answers
519k views

How can I install CUDA on Ubuntu 16.04?

For TensorFlow I would like to install CUDA. How do I do that on Ubuntu 16.04?
59
votes
7answers
197k views

Cannot boot system due to start job running for hold

I've installed ubuntu-desktop on Ubuntu 16.04 Gnome and I picked lightdm and now once I restart, I get this error message when I press CTRL + ALT + F2: A start job is running for Hold until boot ...
33
votes
4answers
130k views

Proper Installation of Kali linux tools in Ubuntu

I think everyone has known - we need to install katoolin to use Kali Linux Tools on Ubuntu. Before did anything I had looked through the internet and also found out these solutions: Can I install Kali ...
24
votes
2answers
16k views

How can I fix Broadcom driver Wifi with 4.15.0-xx kernel on Ubuntu 16.04

I reinstalled a driver on Windows for Broadcom Network Adapter and after that my WiFi stopped working on Ubuntu(16.04) completely. I tried to reinstall drivers, using this commands: 1. sudo apt-get ...
11
votes
2answers
14k views

Ubuntu 16.04 Jan 3 2018 update causing screen/access issues [duplicate]

Yesterday (Jan. 3, 2018), I installed an OS update (Ubuntu 16.04), using the Software Center. My system isn't working correctly now. When my mouse rolls over the Launch bar, it disappears, then any ...
5
votes
2answers
3k views

How can I show notify-send messages triggered by crontab? [duplicate]

test.sh: /usr/bin/notify-send "test" The following works: bash ~/Documents/test.sh BUT the crontab never shows the notification. Why? */1 * * * * bash ~/Documents/test.sh
93
votes
3answers
155k views

Possible missing frmware /lib/firmware/i915

I upgraded my laptop to have the 4.8 kernel and during the process the following warnings came up. update-initramfs: Generating /boot/initrd.img-4.8.0-040800-generic W: Possible missing firmware /lib/...
22
votes
4answers
83k views

sudo apt update always giving Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)

So I am on my college network which requires me to sign in to the browser before I start using the internet. I do so succesfully but on a clean install of Ubuntu, when I try to do sudo apt update, I ...
10
votes
2answers
3k views

Application that will lock screen after a set amount of time for Ubuntu

Is there an application for Ubuntu which will lock the computer after a defined amount of time(e.g. 30 minutes). I need it for kids to limit the time they watch cartoons. E.g. 30 minutes watching and ...
48
votes
3answers
95k views

PulseAudio can not load bluetooth module

I am having trouble connecting my Bluetooth speakers with a fresh 15.10 install (EDIT: applies to 16.04 as well). The speakers are connected however they are not listed as an available audio device. ...
26
votes
5answers
50k views

How to find previous boot log after Ubuntu 16.04+ restarts?

My question is, how can I find boot log from previous system boot attempt? Today when first powering on my PC, boot process stopped on Ubuntu logo, when I pressed Esc I have seen several lines ...
15
votes
3answers
79k views

I'm using Ubuntu 16.04 and there's no fglrx!

I'm using Ubuntu 16.04 and there's no fglrx! What happened?
31
votes
5answers
122k views

Ubuntu repository does not have a Release file

This is similar to Xenial repository does not have a Release file, but the fix in there does not work for me. When running sudo apt-get update on a few-day old installation of Ubuntu 16.04, it ...
63
votes
10answers
187k views

Cannot change brightness (Ubuntu 16.04 LTS, Unity)

I'm new to Linux systems in general (I'm using Ubuntu 16.04 LTS) and I'm having difficulty in changing the brightness of my notebook. When I use the Fn+F8 or Fn+F9 the brightness bar shows up but ...
41
votes
3answers
167k views

How to fix 'modprobe vboxdrv' error in virtualBox?

I install virtualBox on Ubuntu 16.04, but after install and create new virtual Host shows this error: Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is ...
18
votes
1answer
63k views

Ubuntu on 32-bit UEFI (only) based tablet pc

I've created a bootable USB of Ubuntu 16.04 64-bit with Rufus, setting the drive to be a GPT for UEFI. Then I booted my tablet PC and I ran the UEFI BIOS, from which I turned secure boot off. I then ...
5
votes
1answer
29k views

How to get Intel Dual Band Wireless-AC 3168 work on Ubuntu 16.04?

I searched many solutions on this site but most of them were referring to Broadcom Wifi drivers while mine has Intel one. Output of lspci -knn | grep Net -A2 arijit@HP-AU134TX:~$ lspci -knn | grep ...
12
votes
2answers
16k views

TP-LINK TL-WN823N Unable to connect to network

I have purchased a TP-LINK TL-WN823N (EU) V2.0 device, which is a USB device that should work as a Network Interface Card, allowing me to connect my computer to wireless networks. Unfortunately, I am ...
2
votes
2answers
2k views

Installing Ubuntu on a single partition

I’m trying to install Ubuntu 16.04 alongside with Windows 7. My HDD supports only 4 partitions. Three of the partitions are taken up by windows. The fourth one is labelled as free space. Now, how do ...
51
votes
4answers
188k views

16.04 Cannot install anything from Ubuntu Software center [duplicate]

Whenever I double click a deb file, it'd be opened in software center. However, when I click "install" button, it'd change to "installing" for a second but then turn back to "install" and nothing ...
33
votes
7answers
111k views

Ubuntu 16.04 + Nvidia Driver = Blank screen

ORIGINAL QUESTION UPDATE 1: Including Additional Drivers screenshot. I have tried installing both 361.42 and 340.96 and both times, I get a blank screen after restarting. ORIGINAL QUESTION: When I ...
62
votes
3answers
37k views

Nautilus not opening up, showing GLib error

When I launch nautilus from terminal the following error is printed and nautilus doesn't open up. (nautilus:25179): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->...
30
votes
3answers
74k views

After updating to 16.04, bluetooth audio A2DP mode stopped working

I have a nice bluetooth audio receiver connect to my HiFi stereo, and I used to be able to connect it in 14.04 as a A2DP sink with nice quality. After upgrading to 16.04, the device connects only as ...

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