Boris's questions

I m not able to run the game DCS (Digital Combat Simulator)
Apparently a great simulator, used to train French Army pilots.

This game is available for free in Steam, only for Windows OS. It should be possible to install it on Ubuntu thanks to Steam and Proton (a wine like).
See on this page, some have been able to play it, and some don't.

My configuration:

• Ubuntu 20.04
• Graphic Card Nvidia GeForce GT 620
• Nvidia Driver v390.132

I do not see my DVD, I do not know how to access its corrupted data.
What is the way to recover the data with command line?

To watch TV on my computer, with my TV tuner, I installed Kaffeine

I had no problem with this software on Ubuntu 12.04.
But with Ubuntu 14.04, and Kaffeine V1.2.2-2 the result is:

• non HD channels are running ok,
• video of HD channels is ok but not the sound => it makes horrible noise

_{Note that I installed Kaffeine V1.2.2-2 from Ubuntu Software Centre}

Using Ubuntu and AskUbuntu, I see all these key words:

• Linux Kernel (header)
• Gnome,
• Grub, Grub 2,
• Xorg,
• Unity,
• Compiz,
• Metacity,
• ...

Could I get a view about those components (and probably other main components) to understand how they are linked together (with a small definition of their purpose)?

Searching for answers about ways to record Firefox passwords in Gnome Seahorse Keyring vault,
I found severals possibilities:

1. Firefox Gnome Keyring firefox addon
   _{from https://github.com/ in this answer and this answer}

2. Gnome keyring password integration firefox addon
   _{from https://addons.mozilla.org/en-US in this question}

3. Integration con Gnome Keyring firefox addon
   _{from https://addons.mozilla.org/fr
   seems to be the Spanish version of the previous bullet on the French server (humm weird)}

4. add this PPA in https://launchpad.net and install package called "mozilla-gnome-keyring"
   _{from this bugzilla}

But now how can I know which solution is safe ?

In the official Ubuntu website I can found:

• the list of Ubuntu desktop certified hardwares
• the list of Ubuntu server certified hardwares

But no list of tablets!

In Ubuntu web site, I can found that there is the Hardware requirement for installing Ubuntu-Touch.
A good start, but a real list would be better, for example searching for anwsers in AskUbuntu I see that some tablet (Windows ones) can simply not run with Ubuntu "due to secure keys in order to boot up it", so I conclude that Hardware requirement is not enough.

I found a similar question opened 1 year ago. But the answers to this old question were about installing Ubuntu Desktop.
Is there anything new with Ubuntu-Touch?

How can I get a driver to make my Avermedia AverTV Volar Green HD work ?

Now solved. See below:

• solution for latest Ubuntu releases (14.04, 13.10)
• solution for older Ubuntu release (12.04)
• to check that it has been well installed

I lost the Alt+Tab functionality.

How to get it back?

Note:

• I m using Ubuntu 12.04 without Unity
• I m using Gnome classic (no effects) session
• so the Unity plug-in is deselected in compizconfig settings manager for performance purpose.
• I have same settings on an other PC, and on this PC the Alt+Tab functionality is running fine.

I defined 2 user accounts:

• one with admin privilege (with sudo right) => lets call it adminuser.
• a 2nd one without any privilege => lets call it normaluser
  and I configure the autologin on this 2nd user normaluser.
  

So when I open a normaluser session and want to run an application with admin privilege,
I open a terminal Ctrl+Alt+T and:

su adminuser
sudo anyapplication ...

It works fine, without having to quit the normaluser session (no need to open a adminuser session).

But what should I do if the application needs to run with a GUI (Graphic User Interface) ?
I though about that:

su adminuser
gksu anyapplication ...

but I get

** (gksu:9122): WARNING **: the connexion is closed
No protocol specified
No protocol specified
(gksu:9122): Gtk-WARNING **: cannot open display: :0.0

• When I plug the HP Deskjet2050j510 printer directly on my PC through USB cable, it is perfect.
  
  

• But when trying through network, it can not find it.
  
  

Note
I'm using the HPLIP Toolbox to search the printer.
I also desactived the firewall.
My internet box is supposed to allow such functionality, it is a Livebox from Orange(France). Here is the documentation, but for Windows, not Ubuntu
My network installation is the following one: 2 PCs connected to the Livebox and the printer connected by USB to the Livebox too.

I just installed the application Computer Janitor.
The icon is now accessible in the Unity Launcher.

Personally I think that the Unity toolbar is great for "normal" applications, but for system applications I prefer that they are not so easily accessible and the best place is then in the "System Settings" window.

So I can remove this icon from the Unity Launcher, but how can I add it to the "System Settings" window?

Following the advise of an answer in Ask Ubuntu, I downloaded and ran a script with a URL starting by http://goo.gl/

Is it risky to use such file? could it be a virus or something else?

If yes, what should I do?

Some details:
I followed this answer, and did

    wget -O amd-driver-installer-12-4-x86.x86_64.run http://goo.gl/VGYWP
    chmod +x amd-driver-installer-12-4-x86.x86_64.run 
    ./amd-driver-installer-12-4-x86.x86_64.run --extract driver

My graphic card is a Mobility Radeon HD 4200 Series.
I tried the 2 answers from What is the correct way to install ATI Catalyst Video Drivers (fglrx) ?

But unfortunately, it does not work for my Mobility Radeon HD 4200

_{Note
when I raised this question in May 2012, there was only 2 answers to Stephen Myall's question, since then many answers have been added to his post, it is the master post about this subject}

I want to merge information found here and there in order to record in one answer all steps to set my NFS network between my two Ubuntu PCs

This is useful time to time, for example when switching to a new Ubuntu version, I need to reset :

• NFS
• Autofs
• UFW

There are many questions about this subject:

• Remapping both mouse and keyboard to a gamepad
• How do I configure a joystick or gamepad?
• How to control the mouse pointer via my keyboard?
• ...

But the purpose of these questions/answers is to be able to use the gamepad for playing a game.

I would like a solution to use the gamepad to control THE mouse.
To replace the mouse by the gamepad in all applications.
That way I could control my computer in the living-room from my couch with a wireless gamepad.

I have no problem with my USB key devices: there are mounted automatically.
But for the LeapFrog Tag USB device it is not mounted automatically.

So I look in the Ubuntu documentation to mount USB manually.

But fdisk returns only info about my hard disk, nothing about LeapFrog USB.

$ sudo fdisk -l
Périphérique Amorce  Début        Fin      Blocs     Id  Système<br>
/dev/sda1   *        2048   606713855   303355904   83  Linux<br>
/dev/sda2       606715902   625141759     9212929    5  Étendue<br>
/dev/sda5       606715904   625141759     9212928   82  partition d'échange Linux / Solaris

I found some commands able to list this USB device:
- lsusb
- udevadm (need unplug the device before using the command and then plug it to see it)

$ lsusb
...
Bus 005 Device 002: ID 0f63:0700 **LeapFrog** Enterprises POGO<br>

and

$ udevadm monitor --udev
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
UDEV  [1915.787445] add      /devices/pci0000:00/0000:00:1d.3/usb5/5-2 (usb)
UDEV  [1915.796226] add      /devices/pci0000:00/0000:00:1d.3/usb5/5-2/5-2:1.0 (usb)

So I hope to be able to mount it with something like:
sudo mount -t ??? /dev/sdb??? /media/leapfrog

How can I know which option and what is the path of the device?
Is there a way to use USB ID from lsusb ?

I have 2 screens: 17" on left and 22" screen on right side.

When I watch a movie with VLC and want to watch on full-screen on my 22" screen (the right one), I move my VLC window in right screen and then click on full-screen => no problem.

BUT when using Firefox and watching streaming video, watching on full-screen is always on 17" screen (left one).

How can I force full-screen to be on my 22" screen (right one) ?

I'd like to buy a new 1TB disk to replace my old 150GB disk.
Is there an easy way to copy my Ubuntu installation with

• my home folder content,
• system settings,
• applications,
• and so on...

so at the end I can just unplug my old disk and plug the new one without having to re-install everything?

My environment:

• 2 PCs, a desktop and a laptop, both on Oneiric
• they are connected together by ethernet wire
• nfs-common is installed and configured: the desktop is the server
• a TV tuner card is installed on the desktop, I can watch TV with the software Me-TV

It works fine, TV on desktop, and my network too: I share folders thanks to NFS.

But I would like more:

How can I share my TV tuner card from the desktop and be able to watch TV on the laptop too?

If possible I would like a solution that allows me to keep using the software Me-TV, on both PCs.
I bet that there is a solution to create a fake TV card on the 2nd PC with xNBD.

I'm trying xnbd-server --target /dev/dvb/adapter0/demux0 but I cant make it work.

Trying to understand some examples of xNBD command lines, it seems to be meant only for sharing disk player.
If someone as ever used xNBD, he's welcome.

I've installed new version of Ubuntu on my laptop without any issue using the LiveCD. But on my desktop, weird things happen:

• During the 1st try booting with the LiveCD on my desktop, my 2 year old child just hit the keyboard, and after several error messages the desktop loaded and I've been able to test Oneiric. But I wanted to redo a boot before installing Oneiric to avoid mistakes.

• So during the 2nd time I tried to boot with the LiveCD, I couldn't access to the point where I can choose to test or install.

• Before trying a 3rd time, I've "cleaned the system" from System Parameter > System. But after that I'm still not able to access to the point where I can choose to test or install. Now it stops all the time on a black screen.

I do not understand why several boot attempts with same CD have several results.

So I wonder if the state of my current installation can affect re-booting with my LiveCD ?