Nixpkgs: Arrow keys don't work in konsole, yakuake

[michaelpj]

Issue description

The arrow keys, and also Home, End etc. don't work in konsole or yakuake.

Pressing them does nothing - in particular it does not print an escape code, which makes me think that this isn't a TERMINFO problem.

I am using these from XFCE, rather than KDE, but I would hope that that would be supported.

Steps to reproduce

Install konsole. Try to use the arrow keys.

Technical details

• System: 18.03pre116572.9824ca6975 (Impala)
• Nix version: 1.11.15
• Nixpkgs version: 18.03pre116572.9824ca6975
• Sandboxing enabled: yes

[FRidh]

I think it was @edolstra that mentioned this on the ~mailing list~ #nixos as well. Did you find a solution?

[edolstra]

I didn't, I switched to Plasma.

[michaelpj]

Possibly relevant: running showkey I get output for arrow keys, but nothing when running showkey -a.

[qknight]

i switched to xfce4-terminal but we need to fix this, konsole is rather important for us.

[michaelpj]

I also switched to Plasma, where it works.

One thing I think I discovered when trying to debug this is that it is not a TERM issue, or anything relating to interpretation of escape sequences. Rather than getting uninterpreted escape sequences, it appears that konsole just doesn't get sent the sequences at all.

[qknight]

@michaelpj xev started from konsole can still get cursor keys, konsole still can't receive them.

[mbertolutti]

The navigation keys are not working because konsole can't find the data file for the default keyboard translator.

As a temporary workaround, I manually placed default.keytab in my home directory under .kde/share/apps/konsole/.

For a real fix, konsole would need to look at the correct path in the nix store. Right now it relies on QStandardPaths::GenericDataLocation. Maybe this should include /nix/store/<application>/share?

[qknight]

@mbertolutti this solution is awesome, can you also fix the problem in nixpkgs? afterwards contact me to get a reward!