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I have been struggling to get to 12.04 for one of my three systems supporting Mythtv.

There have been multiple false starts and not working functionality.

Furthermore, Unity severely upsets my working style.

Is there a way to do this?

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I don't get anything of this post's reason to exist. –  Bruno Pereira Jun 15 '12 at 23:22

1 Answer 1

up vote 3 down vote accepted

Note: I have switched to Xubuntu from Ubuntu. Originally I thought it was for older, less robust hardware but found it's avoidance of the "advanced" Ubuntu's complexity a blessing and a truly useful desktop for me.

Update: I should have noted that this works for Ubuntu and Xubuntu, Xubuntu just being a plus. I removed Unity after final Xubuntu upgrade.

Note: I upgraded a very simple 10.10 Ubuntu dedicated to an mythtv client to 12.04 without any problems. My big workstation for 10.10 mythtv support was a different story...

The one anomaly not fixed was the 2nd monitor screen1 not being drawn properly, but with Xubuntu I at least get partial functionality.

How I did it (over weeks and many, many false starts)...

  1. I cleaned up my system and made a back-up: Fully updated. Split off /home into a separate partition. Dropped my manual nvidia driver installation, and installed Ubuntu restricted driver. Used nvidia-settings to disable second monitor. Made sure grub2 was installed on MBR of disk containing the root partition. Down loaded and burned the boot-repair disc (10.10 uses a different version of grub2 than later).

  2. Installed Xubuntu desktop.

  3. Used Software sources to find a server.

  4. Ran sudo update-grub

  5. Used Update-manager to do a release-upgrade to 11.04. Removed Unity. Fully updated and set restricted nvidia driver. Reset compiz settings to my standard set (cube with 3D windows). Made a separate back-up of root and home.

  6. Used Software sources to find a server.

  7. Ran sudo update-grub

  8. Used Update-manager to do a release-upgrade to 11.10. Removed Unity. Fully updated and set restricted nvidia driver. Reset compiz settings to my standard set. Made a separate back-up of root and home.

  9. Ran sudo update-grub.

  10. Used Update-manager to do a release-upgrade to 12.04, opening the terminal to avoid missing upgrade query and hanging the upgrade. No need to remove Unity. Fully updated and set restricted nvidia driver. Reset compiz settings to my standard set. Reinstalled Mythtv client. Made a separate back-up of root and home.

Notes:

If upgrade to 11.04 fails (mine did), you may have to restore the MBR grub, hence the burned boot-repair disc.

I found that during download of the release upgrade packages the download would hang. If still downloading, it can be stopped and software sources used to find another server.

I found best practice to switch to the main Ubuntu server when not able to complete download, often slow but sure.

I am blessed with reliable high speed INTERNET access, but still had download problems.

During the upgrades, I found duplicated sources (usually "Canonical partners"...) which I reduce to a single one using software-sources.

I did my upgrades with a dual boot 10.04 (helpful when backing up and restoring but troublesome with grub2. If you use live CD, make sure you have one for each release, 10.10, 11.04, 11.10 and 12.04.

Each upgrade step took a minimum of two hours, and the upgrades stops when it asked you a question, so prepared to be bored.

The 11.10 to 12.04 upgrade has a bug wherein the upgrade ask you a question but you can only see it if you have "terminal" opened, so open it, good idea far all upgrades.

Make sure after each upgrade you back up well, because you may have to stay there awaiting things to be fixed. Good idea to keep prior backups until the desired end result is reached.

In conclusion: If you are trying this and broach at a problem, ask a question on askubuntu and here leave a comment pointing to the question. I will endeavor to answer. And good luck.

My 12.04 Xubuntu workspace (open in a new tab/window for full size)...

enter image description here

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sudo update-grub does not upgrade your system, do you mean sudo do-release-upgrade? –  Bruno Pereira Jun 15 '12 at 23:25
    
@Bruno Pereira This may be unnecessary for some but I found the update process failed to properly update grub for unknown reasons. On the upgrade from 11.10 to 12.04 it left the kernel at 2.6, not 3.2 as required. Lucky I noticed the problem and corrected it with sudo update-grub -- I used update-manager for all release updates. –  keepitsimpleengineer Jun 15 '12 at 23:44

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