Over the past couple of days, I have encountered a strange problem while installing Debian (Etch, but I'm guessing this takes place on any installer). It hangs at 5% of 'Selecting and Installing Packages'. I am by no means a guru, but the problem appears to be caused by a changed or offline keyserver. The following is a workaround:
- Boot the installer with the 'expertgui' option. (Upon boot from disk there will be a prompt. Instead of just pressing enter, type 'expertgui' and then press enter.)
- Begin the installation as normal, stopping after 'Configure the package manager' and before 'Select and install software.'
- At this point, press ALT+CTRL+F2 to bring up a console.
- Press enter to activate the console.
- Run the command: "chroot /target" - this will place you into the system you are installing.
- Run the command: "aptitude install debian-archive-keyring" - this will install the keyring.
- Run the command: "aptitude update" - The update should now work correctly, with no errors about unverified keys.
- Press ALT+CTRL+F5 to return to the graphical installer.
- Continue the installation as normal to the end.
Note: the ALT+CTRL+F2/F5 keys seem to vary slightly from installer to installer. You may not need to press CTRL, or returning to the graphical installer may be F1 instead of F5.