Raspberry Pi multiboot avec Berryboot

  • Berryboot is a simple boot selection screen, allowing you to put multiple Linux distribution on a single SD card.
    In addition it allows you to put the operating system files on an external USB hard drive instead of on the SD card itself.
    To install: extract the contents of the .zip file to a normal (FAT formatted) SD card, and put it in your Raspberry Pi. This can be simply done under Windows without any special image writer software

    Get Berryboot here: https://sourceforge.net/projects/berryboot/

    Once you start your Pi it will start an installer that reformats the SD card and downloads the operating systems files from the Internet.

    1. Fedora MATE/Ubuntu MATE/Raspbian
    2. OpenELEC
    3. Android

4. RasPlex

Get a spare usb drive? Use the rasplex installer to install it to the usb drive. This will format the drive so make sure it’s empty.

After install, browse the drive, in the root will be a file called ‘system’ without an extension.

Rename that file to ‘system.img’ or whatever you want .img

Put your SquashFS formatted image on a USB stick, now plug the usb into your rpi and have berryboot install the file. Go to the “Operating system installer”, hold down your mouse button over “Add OS” and select “Install from USB stick” If your image prefers to have a certain memory split use the extension .img128 .img192, .img224 or .img240 instead of .img. Done.



Apple Bluetooth keyboard troubleshooting

How to Reset an Apple Wireless Bluetooth Keyboard, Mouse or Trackpad (Troubleshooting Pairing and Other Common Problems)

If you are having problems with getting an Apple Wireless Bluetooth keyboard, mouse or trackpad from connecting to your Mac (iMac, Macbook or Mac Pro), you can try this trick. The following mentions the keyboard, but it should work for other wireless devices that have a on/off switch of the contact type (i.e. press on and off, rather than a physical slide switch).

NB: This trick works especially on the original Bluetooth Wireless keyboards, mice and trackpads. New keyboards and trackpads were released in late 2015 which do not have removable batteries. This may not work for those devices. Please let me know if it does so I can update this.

  1. Switch off the keyboard by holding down the power button for at least 3 seconds
  2. Click the Bluetooth icon in the menu bar
  3. Click on “Set Up Bluetooth Device” or “Open Bluetooth Preferences”
  4. Turn on the keyboard by holding down the power button, BUT DO NOT LET GO OF THE POWER BUTTON. It must be kept held down through the entire process.
  5. The Setup Assistant will find the keyboard, so click the name of the keyboard, and then click on “Continue”. Make sure you are still holding the power button down.
  6. You will be prompted for the Pairing Code. You can now release the power button, type the pairing code on the keyboard and then press return. There will be a slight delay whilst the pairing completes (a few seconds)
  7. The keyboard will now be Paired.

So just to clarify, the trick is to continually HOLD DOWN THE POWER BUTTON.

What if this doesn’t work for you?

Is this the problem you are searching for? As stated above, this is for when you have problems pairing, specifically with a Mac. I don’t have other non-Apple devices I want to pair my keyboard with, so have no idea if the steps outlined above will help you if you are on Windows, Android, Linux or anything else.

There are some generic tips that might point you in the right direction. I don’t wish to point out the obvious, but sometimes in frustration these things can be overlooked.

Are you working with a fresh set of non-rechargeable batteries?

Apple’s keyboards are known not to work well with rechargeable batteries as the voltage they supply is too irregular. Battery life on alkalines is in the order of 6 months plus, so there really isn’t any reason to use rechargeables. Any battery that is providing low voltage or irregular current will result in all sorts of weird behaviour. Don’t assume that batteries fresh out the packet are good, try another to be sure.

Have you unpaired the keyboard with any previously paired Mac, iPhone or iPad?

Apple specifically state this in their instructions, and pairing and connection behaviour is undefined if there is a previously paired machine within communication range (up to 10 metres). If you no longer have the machine, or it is well out of range, you may be able to skip this step, but if you can, remove the pairing from the old machine. On the old machine, just go to System Preferences > Bluetooth and highlight the keyboard you want to pair elsewhere, and click the ‘-‘ at the bottom of the list to remove the pairing. Unfortunately you do need to identify any other paired machines, as you can’t tell the keyboard to forget the pairing that is stored on the old machine. This can be big issue in large offices – perhaps IT took your old machine away, gave you a new one, and then reissued your old machine to someone else, perhaps even on an adjacent floor. If they forget to remove the Bluetooth pairings, this can create all sorts of strife, and of course your co-workers may not be happy for you to go digging around in their machines changing settings they don’t understand.

Is there any other device causing interference?

Bluetooth keyboards use the same 2.4ghz frequency used by Wifi and Cordless telephones, not to mention that you may have numerous other Bluetooth devices within the vicinity, paired with the target machine or with others nearby. Bluetooth is a great technology, but it can’t work miracles when there is a lot of electronic noise nearby. If you can’t eliminate interference, you may have to go back to a corded keyboard.

Are you getting incorrect characters, symbols or non-functional keys when using the keyboard?

Lets face it, tech breaks. Even tech by reputable companies like Apple. The only way to check is to unpair the keyboard with your machine, pair it with another, test, and if it works, unpair and pair again. Something of a pain in practice. Also, there are multiple places on OS X where keyboard behaviour can be modified, i.e. you press a particular key on the keyboard, but some other function occurs on the Mac. You need to check System Preferences > Keyboard > Input Sources are correct for your locale. Check System Preferences > Keyboard > Keyboard Shortcuts don’t have incorrect behaviours defined. Individual applications can also modify behaviour, so if you’ve recently installed new software, check there. Also, check System Preferences > Language & Text > Text to see if there are any substitutions that could be causing problems. Use the ‘Restore Defaults’ button where provided to be sure, although bear in mind any legitimate customisations you’ve already made may be lost.

Can you even reset an Apple keyboard?

There is actually no evidence that the Apple Bluetooth Keyboard even supports a reset function. Apple state in their troubleshooting documents that you reset the keyboard by turning it off, then on again. Does that fix the problem outlined above – nope – but the steps above do. Go figure.

As far as Bluetooth technology is concerned, there is no requirement for the device, such as a keyboard, to have any settings that might need resetting. The device can essentially be ‘dumb’. When you make a pairing between a device and its host computer, it is the host the remembers the pairing by noting the hardware identifier supplied by the device during the pairing process. Just because during pairing on an Apple keyboard you type a pairing code onto the keyboard doesn’t mean the keyboard remembers that – it only needs to pass it to the host during the pairing to confirm that you have the correct physical keyboard, in case there are others nearby also in pairing mode.

Whilst this article is titled ‘how to reset…’ I’m not intending to confirm that there is some hidden reset function that Apple forgot to mention. I only use the ‘reset’ word in the title because that is the common term used by people when they want to make something work when all else appears to fail. I spent a fair amount of time trying to resolve this problem for myself, digging through plenty of irrelevant articles before I found what I was looking for. None of them suggested that there was an official, documented (or even undocumented) way of doing a reset on an Apple keyboard.

Now it is apparent that the trick outlined above does seem to do something that just and off/on doesn’t do. That doesn’t mean the Apple keyboard remembers something. There may be some state that is preserved that merely means it doesn’t pair to a new device reliably, but its not clear what it is. If you don’t consider that a reset, then fine, but for all intents and purposes, it is.

Resetting the OS X Bluetooth Device List and the Bluetooth Controller

This is a bit of a last resort, and will affect other Bluetooth connected devices, including your Bluetooth keyboard and mouse, which may have been working fine. Depending on if your keyboard or mouse is currently not working, you will need to use a USB wired keyboard (or alternate Bluetooth keyboard/mouse) to perform these steps, so borrow one from a friend if necessary.

If you follow these instructions, after rebooting you will be asked to setup the Bluetooth keyboard and/or mouse as if you were starting up a new Mac.

NB: This will remove all existing pairing information for Bluetooth devices, so each will need to be reconnected.

You need to have the Bluetooth icon showing in the menu bar. If it is not there, open System Preferences > Bluetooth and enable the option ‘Show Bluetooth in Menu Bar’.

  1. Hold down the Shift and Option keys (‘Alt’ on some keyboards) and at the same time click on the Bluetooth icon in the menu bar. Once the menu is showing, release the keys.
  2. From the Bluetooth menu, choose Debug > Remove All Devices.
  3. Repeat step one, then from the Bluetooth menu, choose Debug > Reset the Bluetooth Module
  4. Reboot your Mac, then setup your keyboard and/or mouse as normal.

Box TV supercharged

Voici quelques informations pour l’installation d’une super box TV câble et/ou satellite.

Le concept est simple, c’est une box avec un système linux ouvert qui nous permet donc de le personnaliser et d’y installer toutes sortes de plugins.

Ce système s’appelle Enigma2. Il existe plusieurs constructeurs qui font des box TV avec Enigma2, le plus connus étant Dream-Multimedia et leurs Dreambox.

Personnellement je recommande Vu+ car leur box sont de bonne qualité et les prix sont plus abordable que les Dreambox.

Certaines box sont dotées de deux voire trois tuners ce qui permet d’enregistrer une voir deux chaine et d’en regarder une autre en même temps.

Certaines box ont un processeur un peu plus puissant qui permet le transcodage live sur un mobile device.