problem updating 14.04 to latest release

Question

Trying to update system ubuntu 14.04 to latest release. keep getting no new release found message. Have tried lots of answers from these forums with no luck. Did find out that this system has issues that updating will fix. My system details:

Toshiba satellite C50D - B - 120( x64, originally windows 8.1 pre installed) with 488.4GB hard disk space

AMD E1-6010 APU with AMD Radeon R2 Graphics × 2

graphics - Gallium 0.4 on llvmpipe (LLVM 3.4, 128 bits)

cant post image so heres the terminal text from what ive tried so far -

s@s-SATELLITE-C50D-B:~$ do-release-upgrade -d
Checking for a new Ubuntu release
No new release found
s@s-SATELLITE-C50D-B:~$ /etc/update-manager/release-upgrades
bash: /etc/update-manager/release-upgrades: Permission denied
s@s-SATELLITE-C50D-B:~$ sudo do-release-upgrade -d
[sudo] password for s: 
Checking for a new Ubuntu release
No new release found
s@s-SATELLITE-C50D-B:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
  kde-l10n-engb linux-headers-3.13.0-32 linux-headers-3.13.0-32-generic
  linux-image-3.13.0-32-generic linux-image-extra-3.13.0-32-generic
Use 'apt-get autoremove' to remove them.
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.

thanks.

Answer 1

do-release-upgrade -d

-d, --devel-release
          Check if upgrading to the latest devel release is possible

If you want to upgrade to the latest release available for an upgrade from your current system then navigate --> System Settings --> Software & Updates --> Updates and change Ubuntu version notification to any then go back to terminal and type:

do-release-upgrade -c -d

You'll get:

Checking for a new Ubuntu release
New release '14.10' available.
Run 'do-release-upgrade' to upgrade to it.

If you don't have GUI you can just run:

sudo nano /etc/update-manager/release-upgrades

and replace prompt=lts to prompt=normal.

Answer 2

I recommend upgrading to the 14.10 version. I think that the 15.04 version (latest release) has still some problems.

To upgrade the 14.10 version, in console:

sudo su
[your user password]
gedit /etc/apt/sources.list

In this file (sources.list), to change all trusty words for utopic (it is easy by using Find and Replace option of gedit). After saving the changes, at the same console:

apt-get update && apt-get dist-upgrade -f

After downloading and installing all packages, you should have your new Trusty Tahr Ubuntu system.

Editing Note: For upgrading directly to 15.05 version (from 14.04), in the sources.list the changes will be all trusty words for vivid.