James Beck wrote:
Ever since I started using Vim (years ago), I've noticed that (very)
infrequently, the Ctrl+u (up a half-page) and Ctrl+d (down a half-page)
commands behave strangely. For example, right at this moment, when I press
Ctrl+u, the page scrolls up 5 lines (instead of 25 or so). But Ctrl+d
works like normal. Wait, now Ctrl+d is doing the same thing! It was
working five seconds ago!
So you can see why this is driving me nuts.
Oooh, even more weird, it's misbehaving in ONE window, but not the other!
Same buffer, different window. And if I press Ctrl+W, R, to switch the
windows around, the behavior follows the window! In other words, now it's
happening in the left window instead of the right.
I've always assumed it was my terminal. But after three separate terminals
running in Windows, CentOS, and Kubuntu, it's happening in all of them.
What the heck key am I accidentally pressing that's putting Vim in
"act-weird-mode"?
This doesn't sound "normal" and I can see how it would drive you
bonkers :)
Given that I've never experienced anything like this in the 10+
years I've been vimming, my first suspicion is that it's some
sort of plugin/filetype issue. A couple questions:
- does it occur in one file-type in particular or in multiple
file-types? (only with Ruby source files; only with Apache config
files, etc)
- do you have any plugins/scripts enabled? (and correspondingly,
does it ever happen if you start vim with no plugins/vimrc loaded?)
- as an off-chance, do you ever have issues with those key-chords
in other applications (such as underlining with ^U in word
processors)? You mention using Win32, CentOS, and Kubuntu, but
you don't mention whether they're in VMs or multi-boot on the
same box (and thus the same potentially flaky hardware) or if
they're each separate machines with their own hardware. I've had
keyboards where a modifier key such as ctrl/shift/alt/win/meta
was stuck and I had to slap it around to free it up. Or perhaps
if you have a snazzy "enhanced" keyboard that tries to do smart
macro-ish things with certain keystrokes.
- since the behavior follows the window focus, do you have any
WinEnter/WinLeave or Buf* events defined?
If the answers to the above questions don't help indicate
anything obvious, it might help to post your vimrc file(s) and
perhaps a dump of your $HOME/.vim directory listing ("find
~/.vim" or "dir /s/b %USERPROFILE%\vimfiles" something like that)
to see if there's anything glaringly suspicious.
-tim
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