On 2017-10-23 06:50 AM, Eli Zaretskii wrote:

[Please keep the bug address on the CC list.]

[Sorry I am going to keep it in CC from now on]

Do you have the corresponding terminfo installed for this terminal?

It seems like I have them:

/usr/share/terminfo/r/rxvt-256color
/usr/share/terminfo/r/rxvt-unicode-256color
...

I have just tried:

export TERM=rxvt-256color # same problem
export TERM=rxvt-color # same problem

Only TERM=xterm* works.

Please also try the pretest of Emacs 26, it's available from
alpha.gnu.org.

I have tested with:

emacs-26.0.90$ ./lib-src/emacsclient -a emacs -nw