Postings by R Kimber

USB permissions question

If I create a script on a USB stick plugged into my system it's
permissions are:
If I try to make it executable with chmod u+x nothing happens, so I
can't run it.

How can I get scripts and programs to run from a USB stick? Is there a
handy guide somewhere?

I tried the advice on
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but "sudo /etc/init.d/udev restart" did not complete and return the
command prompt, so I'm not clear where to go from here.

- Richard.

System problem detected

After completing the upgrade to 19.04, I get a window indicating that
a system problem has been detected. It doesn't indicate what the
problem might be but just offers the option to report it, which I've

How might I best find out what the problem is? I assume there's
something in syslog, but I'm not clear what to look for.

- Richard

19.04 upgrade problems

I have just tried to upgrade from 18.10 to 19.04, but encountered two

The more serious one was that linux-image-5.0.0-13-generic could not be
installed. I got an error message that said:-
triggers looping, abandoned
and it suggested filing an error report.

The upgrade was aborted and a recovery was run (dpkg -configure
-a).This has left me with my old kernel.

My immediate question now is, is it OK to reboot and run all the new
upgraded software with the old kernel? Or would I be better off trying
a completely new installation?

Keyboard re-mapping OOps sorry

Apologies for the aborted post:

I'm trying to remap some of the keys on my keyboard.

Keyboard re-mapping

I'm trying to remap some of the keys on my keyboard.

printer problem

I'm trying to set up a networked printer on a fresh install of
Ubuntu-Mate (18.04.1) on a new PC.

The printer is detected by the new printer install but after searching
for drivers, I get a cups server error "server-error-internal-error".

The printer (Canon MX920 series) set up easily and worked perfectly well
on the old PC under 18.04.1 and previous versions of Ubuntu

I'd really appreciate some suggestions.
- Richard.

USB question

I play music stored on my PC via a USB connection to my DAC.

The player (HQPlayer) does not detect the DAC after a reboot unless I
physically remove the USB cable and re-insert it.

This suggested to me that some module was not automatically loaded at
boot, so I did lsmod before and after re-inserting the cable to see if
there was a new module in the list after re-insertion.

Network interface

Ifconfig tells me that I'm using eno1. That's also what gkrellm reports.

How do I take this interface down from the command line, given that it's
not listed in /etc/network/interfaces, and therefore ifdown will not
work (it actually reports " Unknown interface eno1")

I'm using Ubuntu 18.04.1 LTS


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sync hangs

I'm having problems accessing a usb card that I've been trying to write
to. In Caja I get an error saying "An operation is already pending"
If I type sync on the command line it hangs.
I see from ps that there are three sync processes in uninterruptible
sleep and I can't kill them. I assume this is the problem.

What's the best way to proceed? I'm using Ubuntu Mate 18.04 with

- Richard.

ERC20 Compatible Wallet

Does anyone have any experience with hardware wallets?

Is there one they would recommend that is easy to use with Ubuntu 18.04?

- Richard.

Software updater hangs after about 80%

I started todays update, but this hangs during configuration of

What's the best course of action in this situation?

The last few messages are:-

update-initramfs: Generating /boot/initrd.img-4.15.0-24-generic
/sbin/ldconfig.real: Warning: ignoring configuration file that cannot
be opened: /etc/ No such file or
directory /sbin/ldconfig.real: Warning: ignoring configuration file
that cannot be opened: /etc/ No
such file or directory /etc/kernel/postinst.d/zz-update-grub:
Generating grub confi

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.