Menu System Tools/Software Updater not working after, Lubuntu upgrade from 16.04 to 18.04

[grasso]

Dear Colin,

Did't have time to check yesterday.

This morning I checked for windows popping up. I just use a single 
screen.
I could only see the "Software Updater" Window popping up checking for 
updates and resulting in the normal Window listing the packages to be 
updated.
So the same Window you see after starting "Menu System Tools/Software 
Updater"

Next check I did is starting the command "sudo apt update" using my 
admin password as shown below:
cp-admin at cpadmin-PX707AA-ABH-SR1409NL-NL520:~$ sudo apt update
[sudo] password for cp-admin:
Hit:1 http://nl.archive.ubuntu.com/ubuntu bionic InRelease
Get:2 http://nl.archive.ubuntu.com/ubuntu bionic-updates InRelease [88,7 
kB]
Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [83,2 
kB]
Get:4 http://nl.archive.ubuntu.com/ubuntu bionic-backports InRelease 
[74,6 kB]
Get:5 http://nl.archive.ubuntu.com/ubuntu bionic-updates/main i386 
Packages [271 kB]
Get:6 http://nl.archive.ubuntu.com/ubuntu bionic-updates/universe i386 
Packages [172 kB]
Get:7 http://nl.archive.ubuntu.com/ubuntu bionic-backports/universe 
Sources [1184 B]
Fetched 690 kB in 2s (344 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
49 packages can be upgraded. Run 'apt list --upgradable' to see them.
cp-admin at cpadmin-PX707AA-ABH-SR1409NL-NL520:~$

I also checked the packages with "apt list --upgradable"
cp-admin at cpadmin-PX707AA-ABH-SR1409NL-NL520:~$ apt list --upgradable
Listing... Done
apt/bionic-updates,bionic-security 1.6.3ubuntu0.1 i386 [upgradable from: 
1.6.3]
apt-transport-https/bionic-updates,bionic-security 1.6.3ubuntu0.1 all 
[upgradable from: 1.6.3]
apt-utils/bionic-updates,bionic-security 1.6.3ubuntu0.1 i386 [upgradable 
from: 1.6.3]
base-files/bionic-updates,bionic-security 10.1ubuntu2.2 i386 [upgradable 
from: 10.1ubuntu2.1]
...JUST SHOWING A FEW OF THE 49 LINES HERE...
ubuntu-release-upgrader-core/bionic-updates 1:18.04.24 all [upgradable 
from: 1:18.04.22]
ubuntu-release-upgrader-gtk/bionic-updates 1:18.04.24 all [upgradable 
from: 1:18.04.22]
wpasupplicant/bionic-updates,bionic-security 2:2.6-15ubuntu2.1 i386 
[upgradable from: 2:2.6-15ubuntu2]
cp-admin at cpadmin-PX707AA-ABH-SR1409NL-NL520:~$

I checked 
https://askubuntu.com/questions/8458/how-to-update-ubuntu-terminal#8460
It shows Update software(s) i.e. apply updates:
sudo apt-get upgrade

Should I check if this will work or do you have another suggestion for 
me to check first?

Regards,

Frans

On 24-08-2018 17:14, Colin Law wrote:
> On Fri, 24 Aug 2018 at 15:43, grasso <grasso at deds.nl> wrote:
>> 
>> Dear mailing list members, Colin,
>> 
>> When I run update-manager in the terminal there is no window popping 
>> up.
>> 
>> I had Set Digest Mode set to On.
>> Now I switched Set Digest Mode to Off so I will be able to see the 
>> individual messages again.
>> 
>> I only get below messages shown in LXTerminal.
>> 
>> cp-admin at cpadmin-PX707AA-ABH-SR1409NL-NL520:/usr/bin$ cd /usr/bin
>> cp-admin at cpadmin-PX707AA-ABH-SR1409NL-NL520:/usr/bin$ update-manager
>> 
>> (update-manager:4944): GLib-GIO-CRITICAL **: 11:46:57.955: 
>> g_dbus_proxy_new: assertion 'G_IS_DBUS_CONNECTION (connection)' failed
> 
> 
> Does it then hang or return to the terminal prompt?  If it appears to
> hang are you sure there it has not popped up a window behind other
> windows or on a different screen?  Do you sometimes use multiple
> screens but now not got them all plugged in?
> 
> What happens if in a terminal you run
> sudo apt update
> 
> Are there any other obvious things not operating as expected?
> 
> Colin