Hello Cyril, Thank you for your mail. I had tested the bug bcause of a conversation with someone on the french forum https://www.debian-fr.org/support-debian.html[1]
You can find the conversation here: https://www.debian-fr.org/pas-de-boot-possible-apres-installation-debian-x64-t54628.html[2] and a "polemique" here: https://www.debian-fr.org/bug-installateur-debian-confirme-par-plusieurs-utilisateurs-t54650.html[3] I also had found other traces of this bug on the web. For your demand of /var/log/installer/syslog You must know this thing: I had tested the bug on a "Compaq Presario CQ60" and I had changed the disk before the operation. But now I re-install my usual disk in my computer to work But I found also on the Web this conversation which confirm the bug (you must see in the comment date 23/10: http://www.generation-nt.com/reponses/partition-gpt-grub-raid-soft-entraide-4262073.html?page=2#comments[4] Note that fact: the installer after processing had made a "debconf-show grub-pc"