password restrictions are different in the GUI and on the command line.

[Colin Law]

On 17 July 2016 at 18:27, Chris Green <cl at isbd.net> wrote:
> On Sun, Jul 17, 2016 at 07:01:41PM +0200, s.achterop at rug.nl wrote:
>> > Chris' hint IMO is very good, it could happen that lightdm does use
>> > another keyboard layout.
>> >
>>
>> I don't have a /etc/X11/xorg.conf or /etc/X11/xorg.conf.d
>> So how is keyboard.conf going to be called?
>>
>> During installation I used only defaults.
>> I only set that my location is Amsterdam.
>>
> That's exactly what I did, installed for London UK, UK keyboard and
> lightdm used a US keyboard layout.

Not that that would make any difference for a pwd such as abc1234, and
in particular changing it to abc1234abc1234 would not fix if that were
the problem.

@OP do you have the time and inclination to experiment further and try
to determine exactly what is causing the problem?  I have difficulty
believing it is the length of pwd.  I currently have a six character
pwd on one of my machines consisting of letters and numbers and it
works fine.

Colin