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When I open Ubuntu Software Manager on my machine, sometimes it returns this error:

error

Any idea about it?

I tried to delete the cache:

DNSSEC supported by current servers: no

Transactions
Current Transactions: 0
  Total Transactions: 93545

Cache
  Current Cache Size: 4
          Cache Hits: 3598
        Cache Misses: 17357

DNSSEC Verdicts
              Secure: 0
            Insecure: 0
               Bogus: 0
       Indeterminate: 0

and tried to change the server, trying different servers from US, Fr, Ch, Italy, and also trying the select better service option.

At my eyes, it looks like any server I choose, the IP address remains the same: 151.101.38.49

$ ping p2.shared.global.fastly.net

    PING p2.shared.global.fastly.net (151.101.38.49) 56(84) bytes of data.
    64 bytes from 151.101.38.49 (151.101.38.49): icmp_seq=1 ttl=56 time=31.7 ms

This is my actual config:enter image description here

enter image description here

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4
  • The DNS system is telling you that it cannot find "cdn.fwupd.org". You could try nslookup cdn.fwupd.org to see if pinging the histname causes the DNS servers to pick up the address for the site, and then opening updates.
    – Charles Green
    Mar 6, 2019 at 15:44
  • What's the content of /etc/apt/sources.list? It's just a hunch, but I've seen a similar message when I accidentally made a nonsense edit to that file.
    – anonymous2
    Mar 6, 2019 at 18:21
  • $ nslookup cdn.fwupd.org Server: 127.0.0.53 Address: 127.0.0.53#53 Non-authoritative answer: cdn.fwupd.org canonical name = p2.shared.global.fastly.net. Name: p2.shared.global.fastly.net Address: 151.101.38.49
    – Paolo Di Pietro
    Mar 7, 2019 at 18:11
  • Also, trying to change the address, or changing from where to download software, (US, CH, FR, I) the result is always the same 151.101.38.49 !!!!! $ ping p2.shared.global.fastly.net PING p2.shared.global.fastly.net (151.101.38.49) 56(84) bytes of data. 64 bytes from 151.101.38.49 (151.101.38.49): icmp_seq=1 ttl=56 time=31.7 ms
    – Paolo Di Pietro
    Mar 7, 2019 at 18:56

2 Answers 2

Reset to default
3

As you say "sometimes** it returns this error"
It may be intermittent fault in your ISP server or site server. Run ping cdn.fwupd.org whenever you have the fault.This should be something like

ping cdn.fd.org
ping: cdn.fd.org: Name or service not known

otherwise

ping cdn.fwupd.org
PING p2.shared.global.fastly.net (151.101.194.49) 56(84) bytes of data.
64 bytes from 151.101.194.49 (151.101.194.49): icmp_seq=1 ttl=54 time=44.8 ms
64 bytes from 151.101.194.49 (151.101.194.49): icmp_seq=2 ttl=54 time=44.3 ms

If Software Manger shows error and ping is ok we can pssiblly try Software Manager server configuration.
To open Software & Updates run software-properties-gtk in terminal. In "Ubuntu Software" tab. Choosing some other server as shown below might help.

Software Manger

or maybe in Software & Update>Other Software>Canonical Partners is not selected. As below

enter image description here

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0

Try this first:

  1. Run sudo apt update to reload the list of software sources
  2. If fwupd is not installed, install it using sudo snap install fwupd
  3. Restart the computer
  4. Open Ubuntu Software; the message should be gone

If the message is still there, you can try this:

  1. Open Software & Updates (in 19.10 it's a white A on a blue background)
  2. Select "Other" in the "Choose a server" dropdown
  3. Click the "Select Best Server" button
  4. When the dialog box closes, click the "Reload" button in the dialog asking about reloading the software information
  5. Restart the computer
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