Hello, I have moved the support to /lib/debian-installer.d/S70menu, along bterm, which makes it actually much simpler, and fixes a lot of issues. Along the way it gets disabled on the VGA console; it's kept enabled on ssh and serial consoles.
I'm however still getting displaying glitches on the serial console, which we already had with alpha7. Running from an xterm: kvm -cdrom dest/netboot/mini.iso -serial stdio and passing console=ttyS0 to the kernel, when moving inside menus the display gets completely torn. This doesn't happen when not running inside screen. I thought it might be due to dropping TERMCAP, so I fixed slang2 to keep TERMCAP, but the same issue happens, I'm starting wondering whether there is a bug in screen here, or perhaps just qemu which puts the xterm in a particular state which makes it not properly simulate vt102? Setting TERM=ansi on the kernel cmdline fixes the issue. Samuel