Re: obscure Emacs redisplay bug (Windows?)

[Kim F. Storm]

"Martin Rudalics" <address@hidden> writes:

> Thanks for your suggestions.  I downloaded emacs-21.3.50.1-20050130c-w32
> and managed to install my code.  Unfortunately, there seem to be many
> changes in this new release.  Among other things I was - for the first
> time I installed Emacs on Windows - not able to get a menubar; the
> toolbar is only a poor substitute.

Do you get a menu-bar if you start emacs -q ?

If you do, something in your .emacs disables the menu-bar.

>
> I could notice that redisplay has changed: The bug as I described it in
> my report does not appear anymore.  It reappears, however, in a
> different form: When I now match all occurrences of "nil" the string
> "function" obscures the penultimate line of "bar" whenever `point' is at
> the first occurrence of "or" in "bar".  The decoration is that of
> `font-lock-doc-face'.  

I don't know what happens here.

Can you produce a self-contained test that can demonstrate the problem?

>                        I'm glad to tell you that a variant of the bug
> with two and more obscured lines has disappeared completely.  Hence, I
> believe that you have located the bug already and may have even removed
> it over the past few weeks.

Could be, but I would like to understand what's going on here.

>
> The ellipses that represent invisible text now may get partly overlayed
> with some surrounding face - quite often that of `font-lock-doc-face'
> sometimes that of what I called "ECHO" face in my bug report.  That's
> distracting.  I believe that invisibility ellipses should always appear
> in default face, or at least, all dots of a single ellipsis should be
> painted in the same face.  

A bug related to this has been fixed recently -- I don't know whether it
fixes that specific problem though, since I haven't heard of it before.

>                            Finally, I noticed that my display flickers
> more frequently - in particular when I display a customization buffer in
> a subwindow.

I'm not that familiar with the Windows port, but others have reported
flickering problems - especially with tooltips and the toolbar updates --
that still need to be investigated.

> I shall tell you more when I have managed to get this Emacs more stable:
> While I wrote these lines it has crashed my Windows twice and does very
> strange things with my harddisk whenever it starts up.  Once more,
> thanks for your help,

What version of windows?

Where did you get the pre-built emacs ?  

Maybe it was built in a special way?

-- 
Kim F. Storm <address@hidden> http://www.cua.dk