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I have an external HDD which has an encrypted ext4 filesystem.

When I plug it into one of my laptops and provide the encryption password, I get this popup box saying:

You do not have permissions necessary to view the contents of LABEL

When I connect it to my other laptop things are fine and I can access the drive contents.

Why is this and how can I fix it?

share|improve this question
If you try and access it as root, can you do it? If so, maybe is just a permission issue. Cheers – j0N45 Aug 8 '12 at 8:13
Does your other laptop has Ubuntu? – Mitch Aug 8 '12 at 8:27
Yes, both laptops are on Ubuntu 12.04 and i am able to access the HDD as root. I understand it is a permission problem -- how can I setup things such that I can access the HDD from both laptops? – Fasterz Aug 8 '12 at 16:18

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