unexpected prompt for nameserver IP when using DHCP

[Jonathan Marsden]

Ubuntu release:

Testing Lubuntu Quantal 12.10 Alpha 2 Alternate amd64 image from http://cdimage.ubuntu.com/lubuntu/daily/20120627/quantal-alternate-amd64.iso .

Testing was done in a virtualbox 4.1.16 VM.

Package version:

debian-installer 20101020ubuntu150

Expected Behaviour:

After DHCP configuration, no manual provision of network information should be requested, the installation process should continue to disk partitioning etc.

Actual (unexpected) Behaviour:

During the install process, after a message that DHCP autoconfiguration was successful, a dialog with the title "[!!] Configuring the network" is displayed which asks the user for a list of nameserver IPs.

This issue is repeatable. Using the equivalent i386 ISO image, the issue does not occur. Using the Lubuntu 12.04 amd64 ISO image, the issue also does not occur.

If one enters a suitable IP (I used 8.8.8.8), the installation continues but when booting into the new (virtual) machine, DNS is not functional and /etc/resolv.conf does not contain the expected

nameserver 8.8.8.8

line, but instead contains

nameserver 127.0.0.1

Workaround:

Hand editing of /etc/resolv.conf fixes this at least temporarily, and editing /etc/network/interfaces fixes it more permanently, but clearly should not be necessary.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1018271

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jean-Baptiste Lallement (jibel)]

Thanks for your report.

I could not reproduce this behaviour. Could you attach the content of /var/log/installer from the system which failed to this bug report ?

Thanks in advance.

[Jonathan Marsden (jmarsden)]

Here is a tar.gz tarball of /var/log/installer as requested.

I'm trying to think what other information might be relevant to this. Host PC is running Ubuntu 10.04.3 LTS amd64. VM is set to Bridge mode, not NAT mode. DHCP is provided by the Verizon supplied router that comes with my Verizon FIOS Internet service.

But what is odd to me is that the i386 ISO apparently does the right thing, only the 64bit one seems to have the issue.

Anyway, I hope this helps!

[Jonathan Marsden (jmarsden)]

Further info: the installer.tar.gz is from a whole disk encrypted installation, the original was a basic entire disk install. The same issue occurred in exactly the same way on both kinds of installations, but I no longer have the original whole disk VM, although I could easily recreate it should that become desirable.

[Jean-Baptiste Lallement (jibel)]

I still cannot reproduce with Virtualbox in bridge mode but my host is Quantal AMD64 so maybe the behaviour of VBox is different.

Could you do the following:
- At the boot menu, press F6 then ESC to display the boot command line
- At the end of the line append:
   DEBCONF_DEBUG=developer
- Press Enter to boot
- Reproduce the issue and attach the resulting logs

Thanks.

[Launchpad Janitor (janitor)]

[Expired for debian-installer (Ubuntu) because there has been no activity for 60 days.]