(In reply to Steffen Winterfeldt from comment #11) > I'm moving this to the grub2 maintainer for comments. > > Michael, feel free to close if nothing should be done on the grub side in > your opinion. Yes, I was aware of the issue but hesitate to add it to shim-install, the reasoning was as what Neil have pointed out -> we disabled loading external modules for secure boot so it doesn't matter at all whether the module can be found for the intended use case. And also I'm reluctant to touch the shim-install script, could anything go wrong in it sometimes took long to get noticed as the turnaround time from Microsoft's signing takes months, not days, weeks ... So all must be very careful on that. But I also see your point, the behavior is inconsistent for btrfs and the rest of other filesystems. Think twice and now I'm inclined to accept it as a problem, as long as we are having a real bug report for it.