Login screen restarts when "2" is typed

Bug #529999 reported by gnufreex on 2010-03-01
30
This bug affects 6 people
Affects Status Importance Assigned to Milestone
gdm (Ubuntu)
Undecided
Unassigned

Bug Description

Very weird bug. When I type password on login screen, number 2 inside password triggers restart of X. When password is retyped after X restart, all is OK.

Here is UF thread where people have same problem:
http://ubuntuforums.org/showthread.php?t=1417140

gnufreex (gnufreex) wrote :

PS: I am talking about Lucid Alpha3 AMD64

Steve Winter (steve-winter7) wrote :

I am also on Alpha3 AMD64. And it doesn't matter where in the password I type the two it restarts X regardless, then fine after the restart.

Tomas Åberg (tompalaz) wrote :

I don't think it's just the number two, x crash for me but thats when I put in @. However, @ i located on the 2 button.

Monkey (monkey-libre) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in gdm.
For future reference you might be interested to know that a lot of applications have bug reporting functionality built in to them. This can be accessed via the Report a Problem option in the Help menu for the application with which you are having an issue. You can learn more about this feature at https://wiki.ubuntu.com/ReportingBugs.

affects: ubuntu → gdm (Ubuntu)
whoop (whoopwhoop) wrote :

I tried this like crazy, been typing 2's all over the place. Can't seem to reproduce it. Too bad, this is one of those "fun" bugs, although quite critical.
So it does not seem to be happening for everybody.
I tested this on lucid alpha2 and alpha3 64bit.

Steve Winter (steve-winter7) wrote :

It looks like its not just restricted to pressing "2" in the password box, but at anytime when the login prompt is loading.

Nagy Ferenc László (nfl) wrote :

As I see, pressing 2 causes the same visible and audible behaviour than writing a wrong password and pressing enter.

I have a Hungarian keyboard. If I press Alt Gr+V (which is @), it doesn't cause a restart. If I press Shift+2 (which is "), it does cause a restart.

There are differences between the first login screen and the further ones:
- Key 2 causes immediate failure (restart) on the first screen, works normally on other screens.
- Key 2 on numeric keypad does not cause restart on the first screen, but the password will not be accepted regardless of the state of Num Lock. On other screens Num Lock + numpad 2 works like it should (password is accepted).
- On the first login screen key R switches on Scroll Lock and key W switches it off. Scroll Lock key does not work. Other login screens don't have this weird behaviour.

Removing plymouth package is a workaround. (But I would never find this bug if it was filed as a plymouth bug.)

I have a clean install of lucid alpha 3 on AMD64. Removing proprietary nvidia driver does not make a difference.

Nagy Ferenc László (nfl) wrote :

We are a duplicate of bug #519213, which itself is a duplicate of #522692. There are other duplicates of #522692, which are similar to this.

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