Comment 6 for bug 1634246

I think I see what is happening here. The last few steps of install involve setting up the mirror, updating the apt cache and installing the kernel, langpacks, and other bits for the installed system; doing so while being online *will* make use of the network, and since you're updating the apt cache, you will also get the new packages if you are trying to install anything.

This is different than the "update" process -- updates are not being retrieved, but the kernel is being installed along with other things (as above, langpacks for instance) that are not otherwise available if the installed system is truly offline. I also think this is behavior we'd want to keep; while not everything is being updated, we're at least making sure the most critical pieces of the system are as up to date as possible while we do the installation.

Now, there is no question that this is being an issue while installing the AMD-RAID driver for this bug report. I'm just not sure how to fix this.

Is there a way to run pre-install and post-install scripts from in the chroot instead of in the live session? Depending on what these scripts do, the process might then pick up the right header files to install the driver.

Also, please attach /var/log/syslog from the live-session (or /var/log/installer/syslog after the install has completed, from the installed disk). For the live-session, you will want to retrieve it just before trying to reboot to the installed system.

It would also be useful to start the installer in "debug" mode before getting the logs: you can do this by hitting F6 then Esc at the boot splash (before selecting "Try and install"), and adding "debug-ubiquity" to the command-line at the bottom, just before the "---".

The logs here will provide us with more information to what exactly is happening during the install.