I have installed every ubuntu package downloaded by the SDK manager,but my jetpack 4.4 has not been upgraded to 4.5.1

I fixed the problem. the solution is here :

at the end of the page :

monkeyy043y

Mar 8

Hi,

is your default python version 3.x?
If yes, change in the file /usr/sbin/l4t_payload_updater_t210, line 1:

#!/usr/bin/python
to
#!/usr/bin/python2

Milan

this is another little bug of nvidia. im realizing that the software of this board is full of little unresolved bugs. they are not criticals,but they are very annoying. but the worst thing that I hate is that nvidia does not care so much about the upgrading. the nano still runs with 18.04,but for this version of ubuntu is even ended the life cycle.