Sun 31 Dec 2017 08:25:42 PM UTC, comment #8:
Seeing same behaviour
Microsoft Windows [Version 10.0.16299.125]
GNU Octave v4.2.1

Thu 28 Dec 2017 07:44:02 PM UTC, comment #7:
When more is active with large output showing " less  (f)orward, (b)ack, (q)uit", then vertical scroll shows the same behavior of keeping the cursor on the screen, but with some nuances. Scrolling up works, but the " less ..." line moves up with the screen, and scrolling down only goes till the current cursor position is at the top of the screen. scrolling down shows garbled text interspersed with " less ..." lines. Pressing the down arrow moves that line with the cursor down and cleans up the text again. Pressing 'q' before getting to the bottom leaves the garbled text on the screen and now scrolling up only works until the cursor is at the bottom of the screen, and scrolling down works as far as there is the garbled "more" text still below it, even though the cursor has moved off the screen.

Thu 28 Dec 2017 07:11:23 PM UTC, comment #6:
I've noticed that sometimes horizontal scroll has the same behavior, but the way it does it might provide some more insight into what's happening with the vertical scroll problems as well: When scrolling is being blocked I find that it is resetting the scroll position to keep the cursor on the screen. For very long lines, as long as the cursor is on the screen, it doesn't jump. But if I drag the scrollbar to move the cursor off the screen, then it will jump to where the cursor is at the edge of the screen. Sometimes it doesn't do it and sometimes it does: I can reliably get it to show the jumping behavior by pressing the up arrow to get to a prior long line, and using the left/right arrow keys to move the cursor to different positions to test the scrollbardragjumping.

Wed 13 Dec 2017 08:45:25 PM UTC, comment #5:
Confirmed on dev Octave as well, on Win10 version 1709.
Pager ("more ...") on or off makes no difference. The window contents just can't be scrolled back.
I'm afraid this is caused by Win10's newest feature update. Win10 is a moving target it seems :(

Wed 13 Dec 2017 02:24:55 PM UTC, comment #4:
I have this problem too. I noticed also that I can use the scroll bar to scroll up and briefly see text above what's shown, but it jumps back to the bottom persistently. I have to keep dragging it to have it jump to the right location for a brief second, but as soon as I stop it jumps back down. I can't say when it started, because it certainly used to be able to scroll up.

Sat 09 Dec 2017 05:02:29 PM UTC, comment #3:
Same problem here.
Microsoft Windows [versão 10.0.16299.64]
GNU/Octave 4.2.1

GNU Octave Version: 4.2.1
GNU Octave License: GNU General Public License
Operating System: MINGW32_NT6.2 Windows 6.2 x86_64

Package Name  Version  Installation directory
++
communications  1.2.1  C:\Octave\OCTAVE~1.1\share\octave\packages\communications1.2.1
control  3.0.0  C:\Octave\OCTAVE~1.1\share\octave\packages\control3.0.0
datasmoothing  1.3.0  C:\Octave\OCTAVE~1.1\share\octave\packages\datasmoothing1.3.0
database  2.4.2  C:\Octave\OCTAVE~1.1\share\octave\packages\database2.4.2
dataframe  1.1.0  C:\Octave\OCTAVE~1.1\share\octave\packages\dataframe1.1.0
dicom  0.1.1  C:\Octave\OCTAVE~1.1\share\octave\packages\dicom0.1.1
financial  0.5.0  C:\Octave\OCTAVE~1.1\share\octave\packages\financial0.5.0
fits  1.0.7  C:\Octave\OCTAVE~1.1\share\octave\packages\fits1.0.7
fuzzylogictoolkit  0.4.5  C:\Octave\OCTAVE~1.1\share\octave\packages\fuzzylogictoolkit0.4.5
ga  0.10.0  C:\Octave\OCTAVE~1.1\share\octave\packages\ga0.10.0
general  2.0.0  C:\Octave\OCTAVE~1.1\share\octave\packages\general2.0.0
generate_html  0.1.13  C:\Octave\OCTAVE~1.1\share\octave\packages\generate_html0.1.13
geometry  2.1.1  C:\Octave\OCTAVE~1.1\share\octave\packages\geometry2.1.1
gsl  2.0.0  C:\Octave\OCTAVE~1.1\share\octave\packages\gsl2.0.0
image  2.6.1  C:\Octave\OCTAVE~1.1\share\octave\packages\image2.6.1
instrumentcontrol  0.2.3  C:\Octave\OCTAVE~1.1\share\octave\packages\instrumentcontrol0.2.3
interval  2.1.0  C:\Octave\OCTAVE~1.1\share\octave\packages\interval2.1.0
io  2.4.5  C:\Octave\OCTAVE~1.1\share\octave\packages\io2.4.5
linearalgebra  2.2.2  C:\Octave\OCTAVE~1.1\share\octave\packages\linearalgebra2.2.2
lssa  0.1.2  C:\Octave\OCTAVE~1.1\share\octave\packages\lssa0.1.2
ltfat  2.2.0  C:\Octave\OCTAVE~1.1\share\octave\packages\ltfat2.2.0
mapping  1.2.1  C:\Octave\OCTAVE~1.1\share\octave\packages\mapping1.2.1
miscellaneous  1.2.1  C:\Octave\OCTAVE~1.1\share\octave\packages\miscellaneous1.2.1
nan  3.1.2  C:\Octave\OCTAVE~1.1\share\octave\packages\nan3.1.2
netcdf  1.0.11  C:\Octave\OCTAVE~1.1\share\octave\packages\netcdf1.0.11
nurbs  1.3.10  C:\Octave\OCTAVE~1.1\share\octave\packages\nurbs1.3.10
ocs  0.1.5  C:\Octave\OCTAVE~1.1\share\octave\packages\ocs0.1.5
odepkg  0.8.5  C:\Octave\OCTAVE~1.1\share\octave\packages\odepkg0.8.5
optim  1.5.2  C:\Octave\OCTAVE~1.1\share\octave\packages\optim1.5.2
quaternion  2.4.0  C:\Octave\OCTAVE~1.1\share\octave\packages\quaternion2.4.0
queueing  1.2.5  C:\Octave\OCTAVE~1.1\share\octave\packages\queueing1.2.5
signal  1.3.2  C:\Octave\OCTAVE~1.1\share\octave\packages\signal1.3.2
sockets  1.2.0  C:\Octave\OCTAVE~1.1\share\octave\packages\sockets1.2.0
sparsersb  1.0.2  C:\Octave\OCTAVE~1.1\share\octave\packages\sparsersb1.0.2
specfun  1.1.0  C:\Octave\OCTAVE~1.1\share\octave\packages\specfun1.1.0
splines  1.3.2  C:\Octave\OCTAVE~1.1\share\octave\packages\splines1.3.2
ve\packages\statistics1.3.0
stk  2.3.4  C:\Octave\OCTAVE~1.1\share\octave\packages\stk2.3.4
strings  1.2.0  C:\Octave\OCTAVE~1.1\share\octave\packages\strings1.2.0
struct  1.0.14  C:\Octave\OCTAVE~1.1\share\octave\packages\struct1.0.14
tisean  0.2.3  C:\Octave\OCTAVE~1.1\share\octave\packages\tisean0.2.3
tsa  4.4.5  C:\Octave\OCTAVE~1.1\share\octave\packages\tsa4.4.5
video  1.2.3  C:\Octave\OCTAVE~1.1\share\octave\packages\video1.2.3
windows  1.2.4  C:\Octave\OCTAVE~1.1\share\octave\packages\windows1.2.4
zeromq  1.2.1  C:\Octave\OCTAVE~1.1\share\octave\packages\zeromq1.2.1

Fri 01 Dec 2017 01:56:05 AM UTC, comment #2:
I also have this problem. This seems to have started after the Windows 10 FCU update. Octave 4.2.1 from the installer.

Fri 24 Nov 2017 05:55:40 PM UTC, comment #1:
I am also having this problem, Windows 10, Octave 4.2.1. Any thoughts anyone?

Fri 24 Nov 2017 04:16:48 PM UTC, original submission:
When executing command:
(1:100)'
I can scroll up the command window, while 'more' is not finished.
When it is finished, I can't scroll up anymore.
Another strange this is this:
The command window seems to have some sort of line buffer,
I can scroll down, into the space where nothing has ever been printed (what's the use for this?), but I can't scroll up.
It seems the algorithm which checks where the cursor is, and keeps it in view, is wrong.
