Just to add to this, I also get a message in the terminal that says "Real-time signal 0".
Note also that after 3 attempts to do this, it got a little further and then crashed again. The terminal output is:
Checking for a new Ubuntu release
WARNING:root:fetch result != continue (2)
Traceback (most recent call last):
File "/usr/bin/do-release-upgrade", line 152, in <module>
fetcher.run()
File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py", line 278, in run
_("Fetching the upgrade failed. There may be a network "
File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py", line 50, in error
return error(self.window_main.window_main, summary, message)
AttributeError: 'NoneType' object has no attribute 'window_main'
Also I sent an apport error, but it didn't offer to show raise a bug, Note sure if this is wholly related to this bug, but I am posting here for those more knowledgeable to advise!
Just to add to this, I also get a message in the terminal that says "Real-time signal 0".
Note also that after 3 attempts to do this, it got a little further and then crashed again. The terminal output is:
Checking for a new Ubuntu release do-release- upgrade" , line 152, in <module> python3/ dist-packages/ DistUpgrade/ DistUpgradeFetc herCore. py", line 278, in run python3/ dist-packages/ DistUpgrade/ DistUpgradeFetc her.py" , line 50, in error window_ main.window_ main, summary, message)
WARNING:root:fetch result != continue (2)
Traceback (most recent call last):
File "/usr/bin/
fetcher.run()
File "/usr/lib/
_("Fetching the upgrade failed. There may be a network "
File "/usr/lib/
return error(self.
AttributeError: 'NoneType' object has no attribute 'window_main'
Also I sent an apport error, but it didn't offer to show raise a bug, Note sure if this is wholly related to this bug, but I am posting here for those more knowledgeable to advise!