Fwd: Re: Up/Down U and D keys work weird

I got this by private mail; I think it was meant for the list.

Best regards,
Tony.

Love at first sight is one of the greatest labor-saving devices the
world has ever seen.

-------- Original Message --------
Subject: Re: Up/Down U and D keys work weird
Date: Mon, 22 Mar 2010 12:20:48 -0400
From: James Beck <james@technorouters.com>
Organization: TechnoCNC
To: Tony Mechelynck <antoine.mechelynck@gmail.com>

> - 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)

Not that I can tell, but I typically only edit .c/h files. In this case,
it's a .c file.

> - do you have any plugins/scripts enabled? (and correspondingly, does
> it ever happen if you start vim with no plugins/vimrc loaded?)

The only plugin I've consistently used is cscope. Unfortunately, it
happens so infrequently that it's hard to remember the last time. But I'm
pretty sure it's happened before I had cscope set up on this particular
computer.

> - as an off-chance, do you ever have issues with those key-chords in
> other applications (such as underlining with ^U in word processors)?

No, but I don't think I use that key combination in other apps.

> 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.

They were all separate computers made by HP or Dell (in different states
too... Texas and NYC. Surely, the geo-political landscape doesn't have an
effect, but we can never be too sure). I've used a Dell Quietkey, a
default Dell crap keyboard (three kinds), and finally this MS Natural
keyboard.

I just experienced the stuck key this morning, and a good slap fixed that.
But anyway, no modifiers (shift or alt) seem to affect the up/down
behavior.

> - since the behavior follows the window focus, do you have any
> WinEnter/WinLeave or Buf* events defined?

None that I know of. There's nothing active in my .vimrc file.

> Put the cursor in Normal mode in the misbehaving window, then type
>
> :verbose map <C-U>
> :verbose map <C-D>
> :verbose set scroll?
>
> It could be either that something set a buffer-local mapping, or that
> you inadvertently pressed a digit key just before the Ctrl-U or Ctrl-D.

I will try that, thanks for the suggestion. Unfortunately, I closed Vim
out of habit, so I don't have the problem active. Now I have to wait until
it happens again. I do know that I wasn't pressing a digit key though. It
was very repeatable. But it really did act like set scroll = 5.

I'll post when it happens again. Thanks for the help!

James

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