XPost: linux.debian.bugs.dist 
 From: colin.j.crawford@gmail.com 
  
  Hi Chris, 
  
 Thanks for the quick reply. I'm not a developer, so I'm afraid I don't know 
 what an MR is or how to submit a patch. However, I've taken the text of the 
 relevant NEWS item from the systemd-resolved package as a starting point 
 for the text below. Please let me know if this draft is useful: 
  
 For trixie, mDNS support is now globally disabled by default in 
 systemd-resolved. 
 Users relying on mDNS who are not already using Avahi must mask the 
 associated drop-in configuration file before upgrading, or the machine may 
 become unreachable upon package upgrade. To mask the drop-in, do the 
 following as root: 
  
       mkdir -p /etc/systemd/resolved.conf.d/ 
       touch /etc/systemd/resolved.conf.d/00-disable-mdns.conf 
  
 Best, 
 Colin 
  
 On Tue, Aug 12, 2025 at 3:40€€€AM Chris Hofstaedtler  
 wrote: 
  
 > On Mon, Aug 11, 2025 at 10:20:03PM -0400, Colin J Crawford wrote: 
 > >         With the release of Debian 13 "Trixie," mDNS resolution has been 
 > > disabled in systemd-resolved at a global level, apparently per bug 
 > > 1098914. This can cause mDNS resolution to unexpectedly break in existing 
 > > setups. The changelog for the systemd-resolved package has documentation 
 > for 
 > > how to mask the new drop-in configuration file that causes this, but this 
 > > information was not included in the Debian 13 release notes. 
 > > 
 > > As this is a breaking change that can cause local name resolution to fail 
 > > completely for users who are not using Avahi, I believe that this should 
 > be 
 > > included in the release notes, most likely in the "Issues to be aware of 
 > for 
 > > trixie" section. 
 > 
 > I agree, please send an MR / patch / text draft. 
 > 
 > Best, 
 > Chris 
 > 
 > 
  
 
 
 
Hi Chris,

Thanks for the 
 quick reply. I'm not a developer, so I'm afraid I don't know 
 what 
 an MR 
 is or how to submit a patch. However, I've taken the text of the 
 relevant NEWS item from the systemd-resolved package as a starting point 
  for the text below. Please let me know if this draft is useful: 
 /div>

For trixie, mDNS support is now globally disabled 
 by 
 default in systemd-resolved.
Users relying on mDNS who are not 
 already using Avahi must mask the
 
 associated drop-in configuration file before upgrading, or the machine 
 may
become unreachable upon package upgrade. To mask the drop-in, 
 do 
 the
following as root:

€€ €€ €€ mkdir -p /etc/s 
 stemd/resolved.conf.d/
€€ €€ €€ 
 touch /etc/systemd/resolved.conf.d/00-disable-mdns.conf

Best,
Colin
 
  
 

On Tue, Aug 12, 2025 at 3:40€€€AM Chris Hofstaedtler 
 <zeha@debian.org> wrote:
 
 /div>
On Mon, Aug 11, 2025 at 10:20:03PM -0400, Colin J 
 Crawford wrote:
 
 >€€ €€ €€ €€ €€With the release of Debian 13 "Trixie," mDNS 
 resolution has been
 
 > disabled in systemd-resolved at a global level, apparently per bug
 
 > 1098914. This can cause mDNS resolution to unexpectedly break in 
 existing
 
 > setups. The changelog for the systemd-resolved package has 
 documentation 
 for
 
 > how to mask the new drop-in configuration file that causes this, but 
 this
 
 > information was not included in the Debian 13 release notes.
 
 > 
 
 > As this is a breaking change that can cause local name resolution to 
 fail
 
 > completely for users who are not using Avahi, I believe that this 
 should 
 be
 
 > included in the release notes, most likely in the "Issues to be 
 aware of for
 
 > trixie" section.
 
 
 
 I agree, please send an MR / patch / text draft.
 
 
 
 Best,
 
 Chris
 
 
 
 
 
  
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