Ubuntu – Problem with ppa:barracuda72/ralink repository

launchpadpparalink

I've upgraded from Ubuntu 12.04LTS to 14.04LTS. My WiFi/Bluetooth card is of ralink. When I installed wireless driver the barracuda ppa was added(unchecked) and I enabled(checked) them as follows:

enter image description here

Now, the problem is when I run 

sudo apt-get update && sudo apt-get install build-essential linux-headers-generic

in terminal the output is as follows:

Ign http://mirror.de.leaseweb.net trusty InRelease                             
Ign http://ppa.launchpad.net trusty InRelease 
Hit http://mirror.de.leaseweb.net trusty Release.gpg
Ign http://ppa.launchpad.net trusty Release.gpg
Hit http://mirror.de.leaseweb.net trusty Release
Ign http://ppa.launchpad.net trusty Release     
Hit http://mirror.de.leaseweb.net trusty/main Sources
Hit http://mirror.de.leaseweb.net trusty/restricted Sources
Hit http://mirror.de.leaseweb.net trusty/universe Sources
Hit http://mirror.de.leaseweb.net trusty/main i386 Packages
Hit http://mirror.de.leaseweb.net trusty/restricted i386 Packages
Hit http://mirror.de.leaseweb.net trusty/universe i386 Packages
Hit http://mirror.de.leaseweb.net trusty/main Translation-en
Hit http://mirror.de.leaseweb.net trusty/restricted Translation-en
Hit http://mirror.de.leaseweb.net trusty/universe Translation-en
Err http://ppa.launchpad.net trusty/main Sources
  404  Not Found
Err http://ppa.launchpad.net trusty/main i386 Packages
  404  Not Found
Ign http://ppa.launchpad.net trusty/main Translation-en_US
Ign http://ppa.launchpad.net trusty/main Translation-en
Ign http://mirror.de.leaseweb.net trusty/main Translation-en_US
Ign http://mirror.de.leaseweb.net trusty/restricted Translation-en_US
Ign http://mirror.de.leaseweb.net trusty/universe Translation-en_US
W: Failed to fetch http://ppa.launchpad.net/barracuda72/ralink/ubuntu/dists/trusty/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/barracuda72/ralink/ubuntu/dists/trusty/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

Where is the problem?

Best Answer

That PPA doesn't exist for 'Trusty', just for 'Raring'.

Try to replace 'trusty' with 'raring' for distribution. Just select PPA in 'Software & Updates' (your image) than click 'Edit...' and write 'raring' (without quotes) under 'Distribution'. Do this for 'Source Code' PPA also.

After that

sudo apt-get update

and install what you need. Probably will work everything you install but without guarantee.

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