Suddenly: "Unable to mount"-"Authentication is required" on disk volumes.

[emarkay]

This is new, and I can't fix it - they worked fine last night. 4 volumes on 2 disks one is my Lucid test volume, the other 3 are NTFS.

I can't even see them in root (gksudo) Nautilus!

Rebooting does not help.

Any ideas?

[emarkay]

I have been away for 2 days and NO ONE has even a clue?
I even confirmed that there are no errors in the drives in Windows.

I am able to get to them by using the NTFS Configuration tool, but that is not Ubuntu native and was not needed previously.
What has happened here?

[mcdjork]

Can you post your fdisk?

sudo fdisk -l

[adbge]

I have been away for 2 days and NO ONE has even a clue?
I even confirmed that there are no errors in the drives in Windows.

I am able to get to them by using the NTFS Configuration tool, but that is not Ubuntu native and was not needed previously.
What has happened here?

I had a similar problem after disabling unwanted start-up services. Have you changed anything under Preferences > Startup Applications ? If so, re enable everything and see if that fixes the issue.

If that doesn't work, try running ntfsfix.

[Martin McFly]

Also happens to me. However, I've been messing with startup services and this is result. Trial by fire I suppose, but it would be great to know how to fix it.

I'm joining to group of people with this problems then.

[emarkay]

Sorry, was real busy at end of year. All OK now.

[Shpongle]

what solved your problem in the end just to help other users with similar issues ?

[xflow]

I would also like to know the solution.

[bcummings]

I had this problem as well. I had a hard time figuring out the answer. The fix for me was fairly simple.

In System --> Preferences --> Startup Applications I had been disabling some of programs. It turns out that you need the PolicyKit Authentication Agent enabled. This allowed me to mount the drives that I didn't have access to before. I didn't realize that I needed that for drives located on the main system. Once enabled it allowed me to authenticate and mount the drives.

[Stoney Bird]

For several months, I've been using Ubuntu in a dual-boot system with Windows Vista. Ubuntu and Windows are in two partitions on the boot disk. There is also an external disk drive where I put files that I want to be able to get at from both Windows and Ubuntu. This worked fine until this morning, when I began getting "Authentication required" messages when I tried to access the external drive from Ubuntu. The startup apps have not changed, so the PolicyKit Authentication Agent is still enabled.

Any thoughts?