llanitedave
April 14th, 2017, 04:46 PM
I've been running Ubuntu 16.04 LTS quite happily since it came out. The recent news about the impending death of Unity combined with curiosity about the new KDE 5.9 Plasma desktop motivated me to upgrade. I figured I'd upgrade to 17.04 first and then install the Kubuntu desktop environment. I never got that far.
I found the installation guide in http://www.omgubuntu.co.uk/2017/04/how-to-upgrade-to-ubuntu-17-04 and followed it. First, in the System Settings, I went into Software and Updates and in the Updates tab changed the "Notify me of a new Ubuntu version:" to "For any new version".
I then used the terminal and ran the commands "sudo apt update && sudo apt dist-upgrade" and finally "sudo do-release-upgrade -d". (I now understand that adding the '-d' at the end was unnecessary, but I don't know if it caused my problem or not.)
The update appeared to proceed normally, all packages were fetched and installed, and in a couple of hours it prompted me to reboot for Ubuntu 16:10. Once I did, however, everything fell apart.
Now, starting at the login prompt, the screen flashes about every second, occasionally freezing for a minute or two. When flashing, it goes completely black, then back to the display, and then black again. I'm lucky I'm not epileptic.
I was hoping I could get past this and continue my upgrade to 17.04, but that now fails with the message:
"Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu"
I don't think any of these applies, but I'm pretty much stuck now. Is there a recommended course of action for where to go from here? Am I going to need to do an install from scratch?
I found the installation guide in http://www.omgubuntu.co.uk/2017/04/how-to-upgrade-to-ubuntu-17-04 and followed it. First, in the System Settings, I went into Software and Updates and in the Updates tab changed the "Notify me of a new Ubuntu version:" to "For any new version".
I then used the terminal and ran the commands "sudo apt update && sudo apt dist-upgrade" and finally "sudo do-release-upgrade -d". (I now understand that adding the '-d' at the end was unnecessary, but I don't know if it caused my problem or not.)
The update appeared to proceed normally, all packages were fetched and installed, and in a couple of hours it prompted me to reboot for Ubuntu 16:10. Once I did, however, everything fell apart.
Now, starting at the login prompt, the screen flashes about every second, occasionally freezing for a minute or two. When flashing, it goes completely black, then back to the display, and then black again. I'm lucky I'm not epileptic.
I was hoping I could get past this and continue my upgrade to 17.04, but that now fails with the message:
"Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu"
I don't think any of these applies, but I'm pretty much stuck now. Is there a recommended course of action for where to go from here? Am I going to need to do an install from scratch?