Re: Recenter video

[Eli Zaretskii]

> Date: Wed, 23 Jun 2010 06:06:32 +0300
> From: Eli Zaretskii <address@hidden>
> Cc: address@hidden, address@hidden
> 
> But to make such changes reliably I need to reproduce the problem on
> my machine.  Until now, I can only reproduce it extremely rarely (like
> once in the whole scroll of window.c, and only sometimes), even if I
> load my CPU with 2 programs each of which eats up 100% of CPU
> resources...

I found a way to artificially slow down redisplay, and now I can
reliably reproduce the recentering while scrolling window.c.  It
indeed happens because the window_end_valid flag is nil, and therefore
reconsider_clip_changes does not reset the clip_changed flag, which in
turn prevents try_scrolling from being called.

I can now look for a solution to this problem.  Thanks to all who
patiently tried what I asked them to and explained what they saw.