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I noticed today that when I opened the update manager through the system settings in Ubuntu touch running on Nexus 7, it showed no updates. But the I ran the following two commands in the terminal:

sudo apt-get update
sudo apt-get dist-upgrade

Certain updates started getting downloaded, and upon my consent, they were installed.

Why is this so? Why doesn't the over the air updates facility show the updates? I am running the latest daily build image of Ubuntu touch.

Braiam
  • 69,112
Pushkar
  • 63

2 Answers2

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Updating through the system settings will do an image upgrade which only works when the image is not in writable image mode.

This rather different than doing a package update through apt-get.

These two mechanisms are mutually exclusive:

  • Image Based Upgrades work on non writable images (read only filesystem)
  • Apt get works on writable images

Once on writable image mode the way to get back is to reflash the system (not necessarily losing your user data).

adb shell rm /userdata/.writable_image
ubuntu-device-flash [--channel channel_name]

Details on image based upgrades can be read further here: https://wiki.ubuntu.com/ImageBasedUpgrades

There is a third possibility and that's the one that you may have installed a cdimage based image which is writable by default and today is considered an intermediate image to get to the system images.

sergiusens
  • 807
0

For those who stumble upon this question looking for support for Ubuntu Touch. Canonical stopped support for Ubuntu Touch on 5 April 2017. The project was taken over by UBports as a community project. You can install and maintain Ubuntu Touch on their website Ubuntu Touch