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Carl Karl

Member

Registered: 2013-06-12

Posts: 231

[solved] What's wrong with dm-crypt/luks recently?several attempts now

Hello,

I run a full encrypted LVM on LUKS system, so I'm prompted for a password immediately after GRUB. That went fine long time, but starting with about linux 4.0.1, I have to enter my (long!) password several times until it finally works. It takes up to about 10 times before it is recognized. And no, I haven't forgot the passphrase and I am able to type. And my keyboard works, I'm using it right now to type this.
For now, I added a shorter key as a second password, with that it only takes about 2 or 3 attempts, but still, there seems to be something wrong. (And having a shorter password can't be the solution....)

As I haven't any typing feedback, I can't tell what's going wrong.

Do you have an idea how to debug this? Any sort of keyboard feedback would be appreciated. I wouldn't mind seeing the things I typed on my display, I'm alone when entering it.
Thanks.

Last edited by Carl Karl (2015-05-20 20:00:58)

jasonwryan

Anarchist

From: .nz

Registered: 2009-05-09

Posts: 30,424

Website

Re: [solved] What's wrong with dm-crypt/luks recently?several attempts now

What message is printed after a failed attempt?

I have no issues with any of my boxes...

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Carl Karl

Member

Registered: 2013-06-12

Posts: 231

Re: [solved] What's wrong with dm-crypt/luks recently?several attempts now

Hm, that's strange: Now I had 5 reboots and only one failed attempt, even with the long passphrase!
(In german we call this „Vorführ-Effekt“, something like "show effect": the problem doesn't appear if you try to show it...)

But in that one failed attempt the message was:

No key available with this passphrase.

You can generate this message by tying a wrong passphrase any time obviously... ;-)

But OK, if it stays that way, that would be good enough. (Maybe my problem was fixed with the today released linux 4.0.3?) However, having more feedback while typing than just void would be nice...

Last edited by Carl Karl (2015-05-20 19:50:42)

Carl Karl

Member

Registered: 2013-06-12

Posts: 231

Re: [solved] What's wrong with dm-crypt/luks recently?several attempts now

OK, after another 5 reboots not a single failed attempt, even with the long passphrase.
Problem solved by......?
....however, solved. Thanks for your time.

(PS: deleted the short passphrase again. I hope I won't regret that... ;-) )

Last edited by Carl Karl (2015-05-20 20:09:11)