frequency out of range - please change display mode

Question

From the server API I get the following output:

{
"1": {
"link": "http://www.hfk-bremen.de/t/meisterkurse/n/4-historic-brass-studio",
"title": "4. Historic Brass Studio",
"content": "Vom 13. bis 16. März 2013 findet das 4. Historic Brass Studio Bremen an der Hochschule für Künste Bremen statt. Angeboten an den vier Tage authentische historische Spielpraxis für Trompete, Posaune, Zink und Horn:",
"img": "http:
//www.hfk-bremen.de/sites/default/files/imagecache/event_block_thumb_300w/media/historicbrassstudio_1.jpg",
"type": "concerts"
},
"2": {
"link": "http://www.hfk-bremen.de/t/konzerte/n/orgelkonzert-3",
"title": "Orgelkonzert",
"content": "Studierende der Orgeklassen von KMD Prof. Tilmann Benfer spielen die Choralbearbeitungen von Brahms und Kluge am 14.03.2013 im St. Petri Dom Bremen.",
"img": "http://www.hfk-bremen.de/sites/default/files/imagecache/content_start/imagegeneration/Orgelkonzert.png",
"type": "concerts"
},
"3": {
"link": "http://www.hfk-bremen.de/t/konzerte/n/musik-im-museum-6",
"title": "Musik im Museum",
"content": "Konzert mit Clovis Michon (Violoncello) aus der Klasse von Prof. Alexander Baillie am 14.03.2012 um 19.30 Uhr. Auf dem Programm stehen die Solo-Suiten von J.S. Bach No. 1-3, BWV 1007-1009",
"img": "http://www.hfk-bremen.de/sites/default/files/imagecache/event_block_thumb_300w/media/musikimmuseum_8.jpg",
"type": "concerts"
},
"4": { etc...

(You can visit this API link for a live preview if you have a JSON parser addon in your browser: http://hfkio.thisisasite.de/api/aktuelles)

I am using the GSON library which needs the objects to use as an example to parse the json. But i dont get the structure of this json, it looks to me like one big object containing various sub objects called "1,2,3..." which in turn contain 5 strings each. I am pretty new to JSON parsing and still learning, I don't fully get it how I am supposed to parse this. Any help appreciated.

Solution 1

I usually get this problem every time i upgrade OS.What normally happens for me is after displaying out of frequency range for a while it eventually loads ubuntu without problem. it was the grub menu loaded before ubuntu that was replaced/not shown because of the out of frequency warning.For some, if ubuntu still doesn't load,by pressing enter whilst seeing out of frequency range you should get ubuntu to boot.

For me it was a simple fix .

Once in Ubuntu go to a terminal and run:

gksu gedit /etc/default/grub

A graphical text editor will open. Remove the # from in front of:

GRUB_GFXMODE=640x480 

Save the file and close it. Now run:

sudo update-grub

Reboot, and the "frequency out of range" issue should be resolved.

Solution 2

In my case, the instalation won't worked. I did this on a Persistent Live USB:

• press Ctrl+F1 to open a console;

• stop X

  sudo service lightdm stop
  

  Ctrl+C (I needed this)

  pgrep X
  

  use the pid to kill the process:

  sudo kill pid
  

• generate a config file to X

  X -configure
  

even if some erro it happens, edit the file xorg.conf.new, I used nano.

nano xorg.conf.new

Eeliminate all screens sections except screen0, eliminate references to eliminated screens.

On screen0 change device from Card0 to another, in my case Card2 worked.

Save the file and copy it:

cp xorg.conf.new /etc/X11/xorg.conf

test:

sudo reboot

I hope it helps!

Solution 3

1. Install and run Boot-Repair from a liveCD or liveUSB
2. Click Advanced options
3. Go to the GRUB options tab
4. Tick the out-of-range option
5. Apply
6. Reboot your system.

Comments

[reptilicus]

what are you trying to parse out?

[A. Steenbergen]

I am trying to get something like an array list of "news-item" objects, which all contain link title content img and type.. The amount of news-items are variable

[Hot Licks]

So far as I can tell, it's JSON. All legal JSON can be parsed into Java objects. You don't need to know in advance what the format is, if you allow the parser to use its default generic objects -- an array object, and a "map" object, and a number object, and a string object, and a "NULL" object. After parsing you can figure it out by querying the types of the objects.

[Dave]

thanks for replying Damien, my initial problem was that it didn't boot at all after the error message, I did however find a solution here: ubuntuguide.net/… however your soultion looks to have fewer and simpler steps! grateful for your help

[damien]

Dave i left out sudo update-grub from instructions which have now been added.Did you reinstall ubuntu im just curious how you got into ubuntu to make the changes required if after out of frequency range ubuntu didnt boot.

[Eliah Kagan]

As the post Dave linked to says, you can get past the error screen by just pressing enter, if you don't want to wait or waiting does nothing. @damien You might want to edit your post to include this information, as it would make it more universally applicable.

[BrianPlummer]

Also check out an online json visualizer: chris.photobooks.com/json/default.htm This should help you visualize the data structures.

[A. Steenbergen]

This works, thank you for helping me learn a bit more about json!

[A. Steenbergen]

Thank you for your help, I used Bart Kiers answer now!

[M6299]

This in the only solution that worked for me.