strange 2 Monitor problem



i have a problem while i use Firefox on my second monitor in fullscreen while looking a stream/video.

I always got the notification that website xx is now in fullscreen when i close/minimize windows on my primary monitor. Does anyone has the same problem or a solution for this? I made a short video (39sec) so you can see it
I think the focus of windows will always fall to the second monitor on window close/minimize action.

Hardware Info:
Nvidia gtx960 with nvidia drivers.
Ubuntu Gnome 16.04

A2DP not working in 16.04


I have been struggling to get my bluetooth headphones (Sennheiser Momentum ) working with Xubuntu 16.04. I have been able to make them work a few times, and when they work, they work ok. It’s just that I haven’t found a reliable way to make them work every time. I had Kubuntu 15.10 installed on the same computer and as far as I know, A2DP was working just fine every time. With Xubuntu, I can usually get the headphones to show in Volume Control, but when I try to route audio to them, the signal meter bar freezes and I can hear nothing.

How can I debug this?

Dido here!
I still have 12.04 Ubuntu installed and my bluetooth head set (Uproar Wireless) is working.
Just installed 16.04 Xubuntu on a second HD and can’t get the headset to work.
Hate to go back to the other HD :(, 16.04 Xubuntu is just so pretty!

Might help you out. I have Ubuntu 16.04 on two laptops with no issues with A2DP using the default bluetooth manager. It is possible that whatever bluetooth manager you are using in Xubuntu needs the audio.conf file and I know it isn’t part of the Ubuntu 16.04 install


I tried the askubuntu trick but it didn’t help. I can pair my headphones with xubuntu, but when I try to direct audio output to the headphones in A2DP “mode”, the volume bar stops moving and I hear nothing. If I select the headset profile, audio output works, but sound quality is awful.


I’m encountering this as well, though switching to the headset profile also doesn’t result in any audio. Everything worked fine when I was running 15.10. Have also tried a newer kernel (4.4) but am still having issues. I’m a bit obsessed with this problem and I’ll report any resolution I come to in this thread.


Update: I gave up – ended up buying a BT audio transmitter bridge and associate my headphones with that. 🙁


I have the same on Kubuntu 16.04 (upgrade from 15.10). It works if I remove the bluetooth device and pair it from new. But as soon as I disconnect and reconnect, A2DP doesn’t work.

I tried the answer in but it didn’t work.


Exactly like above.
Delete/Repair BT works once.


I have promising news to report. The issue is in pulseaudio and has been identified in this bug:

I’m using the pulseaudio packages from Joakim and they work. So it’s now just a matter of isolating which patch(es) cause the problem and the bug is In Progress with a High importance. So there should be an official update forthcoming eventually.

Unable to set Image Viewer in Defaults for LXSession


I have been using Lubuntu since 12.04, 32-bit and 64-bit, and have just installed 16.04 64bit.
All this time there has been a glitch in the LXDE menu for setting the “Default applications for LXSession” on the choice for “Image viewer”. It does not stick beyond the current session.
You can set a value (in my case just the standard “Image Viewer”) and this is fine until you shut down. On restart/boot, the setting reverts to “Disable”.
What I have also just found (and checked back on 14.04 on a machine not yet re-installed) is that if you have GIMP installed, it is not listed as an option.

Any reason(s) why?

I have … just installed 16.04 64bit.
… What I have also just found (and checked back on 14.04 on a machine not yet re-installed) is that if you have GIMP installed, it is not listed as an option.

Any reason(s) why?
GIMP shows up in lxpanel’s main menu under Graphics for me. It also shows up when I right-click an image file in PCManFM and choose Open with …


Not a problem there, where I am looking is in the default setup for LXSession Configuration: “Preferences/Default applications for LXSession/Launching applications/Image Viewer”. This always returns to “Disable” on shutdown. This is what sets the default (first in the list) for “Open With”. GIMP is not an option here.

Where the screensaver?


Hi all I have a new installation of 64bit 14.04 (installed from USB key) and it works fine apart from the complete lack of a screensaver, it goes from working to screen shutdown without anything in between and search as I will I can’t find anywhere to turn on or even install a screensaver 🙁 any ideas anyone? Thanks
Petro Dawg

Unless you still have an old CRT monitor, screensavers don’t really do anything practical these days and is the likely reason they were removed from current Ubuntu packages. However, I believe Xubuntu and/or Lubuntu still have screensavers by default if you really need one.

There does appear to be a way to add them to vanilla Ubuntu, but I haven’t tried it so cannot attest to how well it works… (


Ah so it has been removed, reason I was puzzled before this installation I had the 32bit version and that had a screensaver, just wondered where it had gone 🙂


Did you try to use XScreensaver?

sudo apt-get install xscreensaver

Reboot and select proper boot device



I know this might have been put on here a few times but this could or could not be different. I’ve installed ubuntu, fedora, centos all with the same problem while trying to boot into an OS. The problem is “Reboot and select proper boot device or insert boot media…”. I’ve checked my bios set up and I only have one SSD installed no other media to be boot from except if I insert a CD/DVD or a usb.

When I install the install process gives me an option to install with UEFI, saying something to the effect of… the machine has started the install process in UEFI mode but there is already a BIOS install select no to install in bios compatibility mode. No matter which one I select while installing I still get the subject line error.

Thinking my MBR was completely screwed up I tried using parted magic to erase the SSD and start from new. When I tried to boot parted magic in a live CD I get this.. VFS cannot open root device (0,0).

So long story short I’m completely out of ideas. I’m thinking of just buying a new SSD but I feel this is a waste and/or I could be installing wrong on the computer I am using as a server. The machine is gateway DX4870, yes I know its not a very powerful machine but it’ll get the job done for a home computer.

Any suggestions will be greatly appreciated!


With new UEFI hardware there are three ways to boot hard drive. UEFI with Secure boot on, UEFI and CSM.
CSM – UEFI Compatibility Support Module (CSM), which emulates a BIOS mode

The same three ways exist for booting install media, and how you boot install media is then how it installs.
Although most systems with Secure boot on, will only boot flash drive with Secure boot, but may need specific permission to boot USB or DVD settings.

Or you can install from flash drive in one mode, but system is booting in a different mode that is not compatible. Always boot in same mode.
Both Windows & Ubuntu install UEFI or BIOS in the same mode UEFI or BIOS that you boot installer.

And if only Ubuntu best to use gpt partitioning.
But Windows only boots in UEFI mode from gpt partitioning. And only boots in BIOS mode from MBR partitioning.
So generally partitioning type gpt or MBR, goes with boot type BIOS or UEFI.
But Ubuntu can boot from gpt with either UEFI or BIOS.

I believe Gateway is based on Acer. And Acer is about the only UEFI that has specific requirement of setting a UEFI password, and then setting “trust” on the grub/shim .efi boot files. Not sure if your UEFI has that or not.

Acer Cloudbook shows screen for selecting trust
InsydeH20 setup utility
Acer Very latest UEFI/BIOS works, downgrade not required:

Integration of smartphone in Dolphin via KDE Connect is not working properly


Hi there,

unfortunately, the integration of my smartphone in Dolphin via KDE Connect isn’t working properly anymore.
I even deinstalled and reinstalled the package on my notebook and the app on my smartphone and rebooted both devices many times without any success.
There is installed KDE Connect Version: 0.8-0ppa3+pkg7~ubuntu14.10.1; Kernel Version: 3.13.0-87-generic.
I can send files from my smartphone without any problems to my notebook. Furthermore, on my notebook, I can choose a file, right click on it and choose the option Send to (Smartphone) via KDE Connect. The chosen file will be send without any problems to my smartphone.
Also Ping works in both directions (from smartphone to notebook and from notebook to smartphone); even the touchpad on my smartphone (which allows me to move the mouse on my desktop via my smartphone) works fine; also the shared clipboard!

But everytime I want to browse my Smartphone using Dolphin – as I did before without any problems – , I’m getting the following error: Failed to mount filesystem: device not responding.

Anyone any idea how I can browse my smartphone via KDE Connect in Dolphin again as it used to be before?

Thanks in advance!

Graphical artifacts in Plasma Desktop 5.5.5 on Kubuntu 16.04.1


This is a pretty baffling issue, and I’ve had no luck Googling it, so I apologize in advance if there happen to be forum posts on the subject – I haven’t been able to find them.

I’m working off of a new install of Kubuntu 16.04.1 that is currently less than 8 hours old, and the issue is that KDE Plasma Desktop has these strange artifacts that appear in pop-up fields, text entry fields, or other areas. Here’s an example when right-clicking on the desktop:

This also occurs on text entry, so random artifacts will appear and obfuscate text that I’m in the process of typing, along with other assorted nuisances. I wouldn’t be too concerned with this bug, if it weren’t so hard to track down and so ubiquitous. I’ve tested 3 other distributions’ KDE varieties (CentOS 7, OpenSUSE Leap 42.1, and Fedora 24) and the bug occurs in all of them, so at this point it’s either a KDE-wide thing, or it’s some unique iffiness with my hardware, and I’m leaning towards the latter because in the case of the former, I thought I’d find more on this issue.

The hardware in question is a HP Z440 workstation, 6-core Xeon CPU, 16GB of RAM, and a Nvidia Quadro K2200 graphics card. Attempts to install the .run driver file provided by Nvidia have been met without positive results (when I stop X11 the window goes blank and I cannot continue with installation, no matter what I try), and in the case of testing the prior distributions, using the CentOS/Fedora repositories’ kmod-nvidia driver did not alleviate the issue, so it doesn’t immediately seem to be a driver issue.

Regular Unity Ubuntu and GNOME distributions render fine with no errors or glitches.

Any idea what this could be or how to fix it? The only thing that I’ve done to this installation so far is apt-get update and upgrade, so in every other respect it’s fresh. I am looking forward to being able to get to work, though. If anyone needs any more screenshots of the issue in action, I can try to see about capturing text entry.

Thanks in advance,

Did you try different themes ?


Did you try different themes ?

Yes. The artifacts, both on menu and application features and text entry areas, remain there regardless of what theme is set.


Here is some information about that


Here is some information about that

That would be fine, if I was running an Intel GPU. As noted in the OP, this is a Quadro machine with a Xeon model that doesn’t have an integrated GPU.

My solution in the interim is going to be to roll the machine back to the default Unity distribution and monitor this bug – when it resolves, I’ll reconsider the KDE environment, but the current rendering issue renders critical work almost completely infeasible.

Calibre not displaying properly in Lubuntu?


Hi! I’ve just changed my install from Xubuntu to Lubuntu because my poor little computer (a MSI U230 netbook) is getting a bit ancient. It runs really fast now so I’m totally chuffed, however I’m having problems with Calibre. When it launches the splash screen has a black box around the books on the Calibre screen, and then when the application opens it doesn’t have a top bar with the -+X buttons on. Do I need to install a compositor or something? :confused: