[Nottingham] systemd-resolved Failed to send hostname reply: Invalid argument

[Phil Bass]

Thanks, Fay.

I tried masking systemd-resolvd and rebooted but that didn’t help. Then I looked at my /etc/resolv.conf. It was a symbolic link to ../run/systemd/resolve/stub-resolv.conf, which did not exist. In fact, there was no /run/systemd/resolve/ directory at all. I guess that explains it (sort of).

So, I created a minimal /etc/resolv.conf file and Internet access now works.

I’m guessing that Linux Mint 20 is broken but very few users notice because almost all of them have upgraded from a working earlier version. Can anyone here confirm that theory?

Phil Bass
phil.bass at icloud.com


> On 14 Aug 2020, at 13:51, Fay Knight via Nottingham <nottingham at mailman.lug.org.uk> wrote:
> 
> Hi Phil,
> 
> From my limited knowledge of systemd-resolved I don't believe it's strictly necessary, so yes disabling it is worth a try. You might need to also check the contents of the /etc/resolved.conf file to check that it's pointing to a known-good DNS server. Or alternatively you could simply restart the machine afterwards and see if it's now reaching the internet.  
> 
> Fay 
> 
> 
> 
> On 14 August 2020 13:20:58 BST, Phil Bass via Nottingham <nottingham at mailman.lug.org.uk <mailto:nottingham at mailman.lug.org.uk>> wrote:
> Hi, guys.
> 
> It was good to meet a few of you on jitsi last night.
> 
> A few days ago I installed Linux Mint 20 on an old Windows laptop. I haven’t fiddled with any settings (my sysadmin credentials are somewhat lacking but I can follow instructions 🙂). The machine connects to my WiFi but can’t access the Internet. The Logs app contains multiple error messages that say:
> 
> systemd-resolved Failed to send hostname reply: Invalid argument
> 
> Googling for this error message throws up a GitHub thread <https://github.com/systemd/systemd/issues/11626> dating from Feb 2019. The problem was originally associated with sleep/wakeup in Arch Linux but has also been reported as a permanent problem preventing access to the Internet and in Ubuntu. There’s no resolution in that thread and the last post was yesterday.
> 
> I’ve also found a thread on a Manjaro forum <https://forum.manjaro.org/t/i-broke-my-dns-configuration-limited-connection-to-internet-on-manjaro/122487/28> that suggests masking or disabling systemd-resolved and that has solved the problem for the original poster. Is that worth a try?
> 
> Phil Bass
> phil.bass at icloud.com <mailto:phil.bass at icloud.com>
> 
> 
> 
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