Re: Slow response in GNU Emacs 23.4

[oitofelix@gmail.com (Bruno Félix Rezende Ribeiro)]

oitofelix@gmail.com (Bruno Félix Rezende Ribeiro) writes:

> oitofelix@gmail.com (Bruno Félix Rezende Ribeiro) writes:
>
>> Hello.  I have successful used GNU Emacs 23.2 that comes with Debian
>> Squeeze on my I32 machine.  Yesterday I decided to download the latest
>> release from gnu.org, GNU Emacs 23.4.  Then I built it with Athena
>> Toolkit and with -O3 gcc flag.  Now Emacs works wonderful except by one
>> thing: its response time is very high.  It takes a half of second to
>> notice that I press a key.  Does anyone know what could be a possible
>> source of this problem?
>>
>
> I discovered the reason behind this problem.  In my home, I often use my
> netbook (the machine running GNU Emacs 23.4) connected to a big external
> display by VGA output.  Today, I used the LVDS screen and guess you what
> happened?  The problem disappeared.  This seems consistent with the problem only
> showing up under X frames of Emacs.  I'm now wondering why it's
> happening only when I connect to the external screen.  The only thing I
> could think is the stretch transformation rule that I have configured by
> xrandr as follow:
>
> xrandr --output LVDS1 --mode 1024x600 --auto --output VGA1 --mode 1024x768 --scale 1x0.78125 --auto
>
> Any idea?  It could be a bug in Emacs?

Indeed! It's all "--scale" parameter fault. xrandr's stretch
transformation rule was causing that trouble.  Really it isn't a Emacs
bug.  I just replaced that call to xrandr with the following:

xrandr --output LVDS1 --off --output VGA1 --mode 1280x1024

Now I'm using a native resolution and disabling the LVDS screen that I
don't need at home.  That way, I also won the benefit to improve my
resolution.

It's perfect.  My Emacs on a big screen, big resolution, full speed and
 full screen (without borders, title bar, scroll bar, menu bar and tool
 bar).  It isn't the heaven?

-- 
Bruno Félix Rezende Ribeiro (oitofelix)

Ps: Please, let me know my english errors