[Bug 1674532] Re: Ubuntu 14.04 broken during PXE boot

[Ilia Sharov]

I confirm same kind of problem in Precise.
After update to -ubuntu6.10 ipv4 become to be preferable protocol even on ipv6-only servers.
%%
telnet google.com 443
Trying 173.194.222.102...
Trying 173.194.222.101...
Trying 173.194.222.113...
Trying 173.194.222.138...
Trying 173.194.222.139...
Trying 173.194.222.100...
telnet: Unable to connect to remote host: Network is unreachable
%%
Direct protocol direction works fine:
%%
telnet -6 google.com 443
Trying 2a00:1450:4010:c01::65...
Connected to google.com.
Escape character is '^]'.
%%

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https://bugs.launchpad.net/bugs/1674532

Title:
  Ubuntu 14.04 broken during PXE boot

Status in eglibc package in Ubuntu:
  Confirmed

Bug description:
  After installing the libc6_2.19-0ubuntu6.10_amd64_udeb package during
  the automated install of ubuntu 14.04.5, the system was suddenly
  unable to resolve hostnames via dns. Installing -0ubuntu6.9 resolved
  the issue. Reinstalling -ubuntu6.10 broke the system again.

  I note that -ubuntu6.10 was recently added to the archive.

  I am currently unable to install Ubuntu 14.04.5.

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