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136,339 questions with no upvoted or accepted answers
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49
votes
1answer
6k views

Playing iPhone (iOS10) music in Rhythmbox on Ubuntu 14.04

I have been using Rhythmbox on Ubuntu 14.04 to play music from my iPhone for a while now. Sometimes I get the annoying "initialize your iPhone" dialog box, but I just cancel it, unmount and reconnect ...
27
votes
1answer
3k views

systemd-journald crashed with SIGABRT in pthread_sigmask()

Fresh install of Ubuntu 18.04 on a new Lenovo x1c6, I'm getting this error sometimes after resuming from suspend. I have no idea what it means, and search online leads to a bug report that doesn't ...
25
votes
2answers
4k views

Unity7 and Gnome 3: How to disable "lock was blocked by an application", so that Gnome3 always locks the screen?

When I have virtualbox in full screen, on Unity it always locks after 5 minutes, but in Gnome3 (and even Unity7) it shows a popup message: lock was blocked by an application. Can I force Unity or ...
21
votes
1answer
20k views

Failed to start Snappy Daemon

Tried restarting my computer and while it's booting Ubuntu 18.04, it gets hung up after: [FAILED] Failed to start Snappy daemon, See 'systemct1 status snapd.service' for details,
20
votes
2answers
3k views

CRITICAL: Unable to create a DBus proxy for GnomeScreensaver

I received this critical error in my logs, but I haven't had any problems so far. If anyone knows why I get this error and what it means, I'd really appreciate an answer from you. CRITICAL: ...
20
votes
2answers
4k views

Get binary delta-encoded recursive diff of two directories as single patch file in CLI (and online use)

Essentially, I am looking for a GNU/Linux tool, that could recursively iterate through two directories, find file changes/additions/deletions; and for all changed files, output a diff. This can ...
18
votes
2answers
3k views

Window manager warning: Overwriting existing binding of keysym XXX with keysym XXX (keycode XX)

I performed a fresh install of Ubuntu 18.04 LTS on my desktop that I've been using Ubuntu on since Ubuntu 11.04. As I'm setting everything back up and installing all of the 3rd party software I ...
16
votes
0answers
2k views

Why do lines with "c-n-f Metadata" appear in the output of `sudo apt update`?

Kubuntu 19.10 I can't say when this began, but the output of sudo apt update has lines with c-n-f Metadata. ... Hit:11 http://ppa.launchpad....
15
votes
2answers
856 views

How can I automatically hibernate cloud storage servers?

I have cloud storage data centers running Ubuntu 16.04 LTS and NextCloud/OwnCloud that have no need to be available 24/7 and need power management solutions. Servers are Dell PowerEdge 1950 Gen II and ...
15
votes
2answers
2k views

No HDMI video after suspend on Intel NUC6i7KYK

I have the latest Intel NUC, NUC6i7KYK (specs here), running close to stock Ubuntu 16.04. Its monitor is hooked up via HDMI. When it wakes up from suspend (S3), it never wakes up the display. The ...
15
votes
4answers
6k views

Ubuntu 15.10 randomly crashing back to login screen

fresh install of Ubuntu 15.10 here. Everything works fine, but I'm getting random crashes back to the login screen. I pasted my syslog here: http://paste.ubuntu.com/12989589/ Edit: Confirmed bug on ...
14
votes
1answer
6k views

Gradle or Android Studio freezes Ubuntu

I've got a problem with my Android Studio/Gradle regularly freezing my entire system. What happens? I work on my Android Studio and at first, everything is ok. For approx 5 - 10 builds/deploys ...
14
votes
2answers
13k views

How do I configure spice with KVM?

I'm trying to install and configure spice. However, I cannot find a source on how to do this.
14
votes
2answers
3k views

How to disable mouse scrolltabs ubuntu chrome

When I hover on tabs in chrome and scroll the mouse wheel, the tabs are changing focus. This feature is really annoying for me and i want to turn it off. Any ideas? P.S. The way I usually close an ...
14
votes
4answers
16k views

Enable Dolby 5.1 or at least subwoofer on Acer laptop?

I have Dolby Virtual Surround Sound 5.1 speakers with Tuba CineBass Subwoofer on Acer laptop (mine is 5951G but there is also bunch of models with similar configuration of speakers with/without ...
14
votes
1answer
4k views

Ubuntu 20.04 LTS: Screen freezes after login when waking laptop up from suspend

I have got a new Entroware Apollo with Ubuntu 20.04 pre-installed. I have had an occasional but not infrequent issue of my computer screen freezing after login when it is woken up but have no issues ...
14
votes
4answers
3k views

Why ISO master (editor) does not read Windows images

I have the followjng problem with ISO master software: I try to edit WIndows 7 ISO image $ isomaster windows7.iso The file does open, unfortunately all I get is README with message: This disc ...
13
votes
1answer
4k views

No microphone in Ubuntu 18.04 on HP elitebook

I installed Ubuntu 18.04 on my new HP elitebook 850 G6 after erasing windows. I could not get audio input part working though.. Fn F8 key is orange all the time and this is how settings looks like. I ...
13
votes
1answer
3k views

List and remove unofficially installed CA certificates

This article expose how around 18% of HTTPS connections are being detected as intercepted by MITM proxies. As the great related paper states: To circumvent this validation, local software injects a ...
13
votes
2answers
5k views

Error during mysql-server installation

I was trying re-installing mysql-server, but I am getting some sort of warning during installation. It got installed but it's not working. Setting up mysql-client-core-5.7 (5.7.23-0ubuntu0.18.04.1) .....
13
votes
0answers
8k views

Ubuntu not booting: timed out waiting for device

My laptop has Ubuntu OS. While trying to boot it is giving me the following error: 97.255199 systemd[1]: timed out waiting for device #...
13
votes
3answers
6k views

text highlighting (select to copy) stopped working in the terminal

I have a weird effect in one workstation: suddenly, the system does not allow me to copy text from a terminal to paste it somewhere else by simpling selecting it. I can still paste into the terminal ...
13
votes
5answers
4k views

Problem with USB mouse in Ubuntu 16.04

Since I have Ubuntu 16.04 have not had any problems with the PS2 mouse, but a week ago I placed a new mouse USB. This mouse freezes randomly (Sometimes while I am using the PC and sometimes this ...
13
votes
2answers
2k views

Disable automatic brightness according to content in Ubuntu 14.04

I am running Ubuntu 14.04 LTS on a Dell Latitude E3440 laptop. My problem is that screen brightness automatically changes depending on content. This means that the screen gets brighter when the ...
13
votes
1answer
2k views

Configure Xorg to work from integrated GPU

I am using Ubuntu 14.04LTS, with an Intel CPU + integrated graphics, with a GTX650 GPU. I asked this question on SO but they said it was offtopic. I want to use my GPU for debugging CUDA code and for ...
13
votes
1answer
512 views

Prevent light-locker from setting volume to 100%

I'm on 14.04 with XFCE. When I lock the screen it appears to mute the system volume (or perhaps just mute anything from the locked session?). When I log back in the volume is reset to 100%. This ...
13
votes
1answer
239 views

What's the official support period for Ubuntu Core releases?

There recently was talks on Meta about the support period of LTS and non-LTS releases on this site. In addition, I saw the mention of Ubuntu Core in a comment, and this got me wondering what the ...
12
votes
0answers
3k views

Does Wayland have an equivalent of xrandr for changing brightness and color temperature?

xrandr can be used to change the display brightness using the command line. For example, xrandr --output VGA-1 --brightness 0.4 Wayland does not support xrandr. Is there any similar tool in Wayland ...
12
votes
0answers
781 views

Natural scrolling setting get reset

I'm using bluetooth mouse A4Tech BT-630 in Ubuntu 20.04. Each time I go afk the mouse goes to sleep and when I click any mouse button to wake it up the natural scrolling setting I've set previously is ...
12
votes
1answer
2k views

Ubuntu 18.04 -> 20.04 alt-tab gets slow / laggy after a while

I recently updated to 20.04 LTS from 18.04 LTS. When my system is up for like a day, alt-tab starts to lag. Not the window switcher panel, but when I select the window I want and release keys, it ...
12
votes
1answer
239 views

How do I enable scrolling with a mouse in a TTY in Ubuntu?

When I use gpm with a mouse in a TTY (ctrl+alt+f1), it allows mouse movements with a blinking cursor and such but scrolling with my mouse wheel doesn't cause any visible changes. How do I enable ...
12
votes
1answer
4k views

Ubuntu randomly, suddenly logs out my user session back to login

Since the last couple days, I'm suffering a killer bug on my Ubuntu 18.04 that never had before. I'm working on my desktop session, and suddenly, randomly, the screen turns black and then the login ...
12
votes
0answers
6k views

"upowerd[4116]: unhandled action 'bind'" messages filling up syslog

On a laptop with Ubuntu 18.04, /var/log/syslog gets new block of the four following messages about 5 times per second: Aug 29 19:17:17 my_hostname systemd-udevd[336]: Process 'hid2hci --method=dell --...
12
votes
1answer
876 views

How to disable mouse interference with Alt+Tab?

I want to be able to use Alt+Tab or Alt+` to switch back to a previous window AND at the same time start moving the mouse to where I will be clicking, without it all switching to the wrong window just ...
12
votes
1answer
10k views

rdesktop gives ERROR: Failed to open display:

I have a .bash_aliases file with several aliases which I use to connect to Windows machines. The aliases are set up like this: rdesktop -d domain -u username -p password -k fr-be -g 1920x1024 -T ...
12
votes
1answer
3k views

USB-C to HDMI Cable issues in Ubuntu 16.10 and 17.04

I'm trying to use a USB-C to HDMI cable (not adapter) to connect to an external monitor with no luck. The display is detected, can be selected, and displays video but the video is not displayed ...
12
votes
1answer
2k views

How to set default browser on Ubuntu Touch?

I want to set Firefox as the default browser on Ubuntu Touch so that links in Dekko, RSS reader, etc. open in Firefox instead of the Ubuntu touch browser. I can't find a "default browser" setting in ...
12
votes
0answers
2k views

pam_mount often unable to mount and hangs for minutes

I have some centrally managed Ubuntu workstations that authenticate users against Active Directory and mount user home folders on logon with pam_mount. This usually works as expected, but sometimes ...
12
votes
2answers
476 views

Get Windows Back After Waking Up On 16.04 LTS

On my dual-monitor setup some windows get off screen after the sleep (suspend) mode. I have to manually Alt+Space to move them back. How can this be accomplished automatically after the sleep?
12
votes
1answer
1k views

Prevent pop up every time I plug in headphones in 16.04

Every time I plug in headphones, this pops onto my screen: I will never, for the rest of my life, use a headset. I have no interest in this option. Clicking Sound Settings does not provide the ...
12
votes
0answers
800 views

Per-application xfwm theme

I want to run separate applications with different themes, the only solution for this that I could find was to use bash -c 'GTK2_RC_FILES=/path/to/gtkrc program'; however, I currently am using a XFCE4 ...
12
votes
2answers
1k views

How to display characters in (virtualbox) TTY?

I'm running Ubuntu 12.04 in VirtualBox, but can't get Chinese chars to display correctly. Here's what chars that should be Chinese look like: I've done everything I could, including: sudo apt-get -y ...
12
votes
0answers
9k views

Unable to find an initial ram disk that I know how to handle

After upgrading to the next linux image, aptitude has outputted the following lines: Setting up linux-image-3.16.0-38-generic (3.16.0-38.52~14.04.1) ... Running depmod. update-initramfs: deferring ...
12
votes
1answer
657 views

How do I use non-regular variant of a font in Ubuntu?

How do I use non-regular variant of a font in Ubuntu? Simply stating, I was trying to use light variant of a font. However, I couldn't. Every time I select those light variant, Ubuntu reluctantly ...
12
votes
2answers
2k views

How to resolve my "loading icons" in compizconfig while loading Ubuntu 14.04 on Virtualbox?

I'm running through the post about unity-doesnt-load-no-launcher-no-dash-appears to get my 14.04.1 loaded on VirtualBox. I've gotten to the step where I run ccsm, but it hangs at "Loading Icons...", ...
12
votes
1answer
985 views

How to cache pgp passphrase permanently with seahorse (14.04)

I am trying to get seahorse-daemon (formerly seahorse-agent) to cache the passphrase for private pgp keys permanently. I have used dconf-editor to set "gpg-cache-method" to always, but the setting is ...
12
votes
1answer
761 views

Ubuntu 14.04 crashes on resuming from suspend

Scenario. I recently uninstalled Nvidia propitiatory drivers, and installed nouveau ones. Before that, sleep and resume worked fine. So it might be a driver issue, but i dont want to taint my kernel ...
12
votes
2answers
3k views

Evince ignores page margins when printing

I'd like to print a PDF with custom page margin settings. So I opened the PDF with Evince (standard document viewer) and added a new page size in the print dialog: It has a bigger margin on the ...
12
votes
1answer
4k views

Printing Comments with PDF

Is there a way to print the comments that are associated with a pdf on the linux version of Adobe Acrobat 9? Both acroread and evince display the comments just fine, however the linux version of the ...
12
votes
2answers
2k views

Can't use bluetooth audio device despite Pulseaudio modules loaded and device connected

I already spent hours and hours to get my bluetooth audio device running. System: Ubuntu 16.04 LTS Xenial, all updates installed, running on a Lenovo Y50 Notebook Device: Bluetooth receiver MR230, ...

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