Postings by R Kimber

Printer problem

After upgrading to 18.04 I am no longer able to install my printer.

With 17.10 I had a Canon MX920 operating as a network printer. However
the upgrade has removed this and I am now prevented from installing the

The printer and its IP address are detected, but after doing its search
for drivers, the setup program gives a cups server error:

I have tried re-installing Cups, but to no effect.

setting CPU frequency

My CPU will run up to 4.4Ghz but I want to limit it to a maximum of
4.0Ghz to avoid overheating problems.

When I try:
sudo cpufreq-set -u 4.0Ghz
or indeed any cpufreq-set command, I get:-

Error setting new values. Common errors:
- Do you have proper administration rights?

Ubuntu Mate panel

I have a small question about Mate panel. On my panel there is an
inactive area where neither left nor right mouse clicking does
anything. The area is not blank, however, and contains the characters
↕,9,A each in a circle, thus:-

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Can anyone tell me what the significance of these characters is? On
one occasion the 'A' and its circle turned red briefly. Presumably they
are indicators of something or other. I can't seem to delete them, so I
may as well find out what they mean :)

I'm using Ubuntu Mate 16.04.3 LTS

Broadband speed testing

Does anyone know of an alternative command line speed tester to

Recently speedtest-cli has been giving bizarre results and the
developer has been unresponsive, so I'm looking for an alternative.

I'm on a 200 Mbps tariff, but speedtest-cli has been reporting download
speeds of 1.58 Mbps, whereas an online tool by Which? reports 193 Mbps
and the Fingbox attached to my home network reports similar speeds.

mate panels

I've just done a fresh install of Ubuntu Mate 16.04.3 LTS

When I go to Additional Drivers and install either of the nVidia drivers
and then reboot (and incidentally the reboot button there doesn't
work, I had to reboot manually), the Mate panels have disappeared,
leaving just a desktop.

Any idea how to restore the mate panels?

I tried:
mate-panel --reset
as mentioned in some google answers, but that doesn't do anything

- Richard Kimber

Gnome replaces Unity

I understand that in 17.10 Gnome is going to replace Unity.

When Unity was introduced I stuck wiith Gnome and eventually ended up with

So, my question is: would people advise moving back from Ubuntu-mate to the
main Gnome-based distribution? I'm not sure I see the point of Mate
post-17.10, but maybe there is some benefit in sticking with it (?). Or is
it all purely cosmetic?

- Richard.

Samba error message

When doing:
sudo apt-get autoremove, I get the following:

"Setting up samba (2:4.5.8+dfsg-0ubuntu0.17.04.3) ...
Failed to preset unit: Unit file /etc/systemd/system/samba-ad-dc.service is

nfs on 17.04

I'd be grateful if someone could confirm that nfs works on their 17.04

I've spent 2 days trying to get my raspberry pi to access files on my 17.04
PC, and I need to know that someone else has it working before spending more
time on it. The Pi side of things seems to be OK since it will access files
on a networked NAS drive which is mounted by nfs.

The main online guides (which I've followed) seem to be:
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A lot of the online documentation is out of date (e.g.