Hello, I have reopened this bug as this problem even shows on ppc64el again with the latest netinst daily build downloaded from [1]. I have tested the image on an IBM 8247-42L inside a PowerKVM virtual machine.
Removing the patch again fixes the problem for me. However, at least on big-endian ppc64, debian-installer does not accept any keyboard input after the language menu shows up. So, either the system has crashed at this point or there is something wrong with the input device. Adrian > [1] > https://cdimage.debian.org/mirror/cdimage/daily-builds/sid_d-i/current/ppc64el/iso-cd/ -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913