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Bug#720073: grub fails to install with root partition >~50GB

Package: installation-reports
Version: Whatever version's on the currently available 7.1.0 netinst cd image
Severity: important
Tags: d-i


When installing on a UEFI system (Lenovo Ideapad Z585), amd64, (installer booted in UEFI mode, _I think_), installing grub fails with:

Executing grub-install dummy failed. This is a fatal error.

Extra information: The disk had a ~300M efiboot partition as the first partition, and the root partition was in an encrypted LVM volume, EXT4, and was 60GB in size.

Looking at the log on VT4 finds it is giving me

/usr/sbin/grub-probe: error: unknown filesystem.
Auto-detection of a filesystem of <my lvm root partition> failed.
Try with --recheck.

After a lot of research this post http://ubuntuforums.org/showthread.php?t=1935765&p=11757198#post11757198 suggested there's a "known bug" in grub with "large" root partitions. So, trying again, I used a 40GB root partition and lo and behold it worked.

I realize that this might be a "known bug" (perhaps with a fix), but I thought it best to alert you that this "known bug" is shipping on your currently available 7.1.0 netinst cd image and causing trouble (actually I used the "unofficial" with-firmware image, but I'm assuming it's "in sync" with the official 7.1.0 image as far as this is concerned).


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