After lots of googling, I found that the third party software (or community maintained) are in "universe" repository component.
https://help.ubuntu.com/community/Repositories/Ubuntu So, I changed my apt software sources for only "universe" to "trusty", as the other three (main, restricted and multiverse) are good with "precise". Add following to the /etc/apt/sources.list [code] deb http://archive.ubuntu.com/ubuntu/ trusty universe deb-src http://archive.ubuntu.com/ubuntu/ trusty universe [/code] It is working fine... though need to be vigil for some behaviour of apt; such as some packages may be kept back or not upgrade ( but that's not a big deal since those are dependencies which are kept back for some other packages, and therefore need not to upgrade). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1263053 Title: Update the avrdude, avr-libc, binutils-avr and other packages in precise and lucid branches of Ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/git/+bug/1263053/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
