no response to scroll wheel

[My name]

". . . new in htop 2.0 . . .
If you're using NCurses 6, htop will also support your mouse wheel for scrolling."
  -- https://hisham.hm/htop/

Doesn't work for me. No response to scroll wheel. Any suggestions? I'd really like to make this work.

htop 2.0.1
ncurses-bin 6.0+20160213-1ubuntu1
Ubuntu 16.04 LTS Xenial, 64 bit
kernel 4.4.0-98-generic
xorg 1:7.7+13ubuntu3
openbox 3.6.1-1ubuntu2
 and that's it. No further DE beyond openbox. System was built from the mini.iso.

Tried in all the following terminals:
lxterminal 0.2.0-1ubuntu0.1
xterm 322-1ubuntu1
terminator 0.98
xvt 2.1-20.1ubuntu1

[Christian Ehrhardt  (paelzer)]

FYI - For various downstream consumers of ncurse it is still compiled with --with-abi-version=5.
As ncurse 6 was explicitly mentioned I'D assume it is abi ver 6, and that might be the reason.
I have no insight in any planned transition, just wanted to let you know.

[My name (plmalternate)]

TBH, I don't understand you. As indicated my Ncurses version is 6 something. I don't have a clue how it was compiled since I installed it with apt-get from the standard Ubuntu repo. Are you saying I should try compiling it myself?

[Christian Ehrhardt  (paelzer)]

Hi,
no I'm not suggesting to build it on your own.

Trying to resummarize:

TL;DR - ncurses is not at (ABI) 6, so htop doesn#t get scroll wheel support atm

Details:
1. htop 2.x + Ncurse 6 = scroll wheel
2. Ncurse is at source version 6
3. But Ncurse is built with API=5 to behave like before
4. Due to that htop does not get the scroll wheel functionality atm

And I was no part of that build or decision I don't know any details.
It was just FYI as I have seen the bug and realized this special build option.

If you are interested what I mean search for
  .so.5
and
  .so.6
In https://launchpadlibrarian.net/356722560/buildlog_ubuntu-bionic-amd64.ncurses_6.1-1ubuntu1_BUILDING.txt.gz

[Andreas Hasenack (ahasenack)]

I believe this is fixed in cosmic now, after the ncurses transition that happened a few weeks ago.

In a cosmic container, I'm able to move the line in the htop screen with the mouse wheel, whereas in bionic nothing of the sort happens.

And to confirm this further:

bionic:
$ ldd $(which htop)|grep ncurses
 libncursesw.so.5 => /lib/x86_64-linux-gnu/libncursesw.so.5 (0x00007efe6d7a5000)

cosmic:
$ ldd $(which htop)|grep ncurses
 libncursesw.so.6 => /lib/x86_64-linux-gnu/libncursesw.so.6 (0x00007fb763f36000)

Closing the bug as "fix released" since it's available in Cosmic.