Hi,we install all our systems with FAI and at least our FAI setup does not set grub-pc/install_devices. That might be an issue with our setup or a general issue with FAI (we'll have to look into that).
Anyhow the change surely breaks all installs beforegrub-pc/install_devices has been properly set at install time (might be 10 years ago or more for a server). Manually fixing it on > 1000 (heterogeneous) servers might be quite a big effort.
So for a change in a Debian stable point release this looks like a quite serious regression to me.
Best Christopher
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