I go to System Settings -> Software sources. I see there many Software sources with the comment "disabled on upgrade to raring". When I click on the check-button or select ppa name to edit/delete that source nothing happens. This behaviour only occurs with sources inherited from 12.10. Sources added after upgrade can be removed correctly.

What should I do?


You don't have to click on check buttons just click on the ppa and the click on remove button below.

enter image description here

  • Even if I click in the name of the ppa, the remove button do nothing with sources inherited from 12.10. Selecting and removing sources added after upgrade works fine. – Israel Varea May 13 '13 at 15:59
  • Try to upgrade to mainline kernel 3.9. See here for installation direction. – 22lk94k943 only May 14 '13 at 4:29
  • Nothing stated here works. – Steve K Dec 5 '13 at 12:54

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