Emacs+Ansi-Term Display Glitches

Emacs+Ansi-Term Display Glitches

[Geoff Ferrari]

Hi,

I'm experiencing some display glitches when using ansi-term to access a
shell under the X11 version of emacs. There seem to be two separate
glitches, and they're a little hard to describe so I've included a link
to a video of the problem.

FIRST GLITCH

When I reach a full screen of text under ansi-term (i.e. once I've typed
in a few commands and the history of these commands fills the screen, so
that the input line is now at the bottom of the screen), the whole
screen seems to either flash or jump every time I type a new character.

SECOND GLITCH

After I've either filled the screen using my own commands, or after I've
used a programme such as top or mutt which takes over the whole screen,
then the two lines at the top of the screen seem to persist. Running the
"clear" command does not clear them, but they are cleared if I run the
"reset" command.

You can see a download a video (7.6MB) of these glitches from:
http://cloud.geoffreyferrari.com/apps/files_sharing/get.php?token=db8e2a6726e03d1816548e17447a1df626215ac4

Both of these problems occur on both the latest 64-bit versions of ubuntu and
debian wheezy. With the terminal version of emacs I get the second
problem (lines being left at the top of the screen) but not the first
(no display jumpiness).

My version of emacs as reported in Ubuntu 11.10 is

"GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.5)
 of 2011-08-14 on allspice, modified by Debian"

I wonder if there's anything I can do to remove these annoying glitches,
of whether they are a bug that should be reported.

Geoff

Re: Emacs+Ansi-Term Display Glitches

[Vladimir Murzin]

Hi!

Have you tried disabling composite manager?

I met similar problem several months ago. Turning of composite feature of Metacity solved this problem for me.
Best wishes, Vladimir Murzin

-----Original Message-----
From: Geoff Ferrari <geoffrey.ferrari@me.com>
Sender: help-gnu-emacs-bounces+murzin.v=gmail.com@gnu.orgDate: Mon, 26 Dec 2011 15:30:48 
To: <help-gnu-emacs@gnu.org>
Cc: <bug-gnu-emacs@gnu.org>
Subject: Emacs+Ansi-Term Display Glitches

Hi,

I'm experiencing some display glitches when using ansi-term to access a
shell under the X11 version of emacs. There seem to be two separate
glitches, and they're a little hard to describe so I've included a link
to a video of the problem.

FIRST GLITCH

When I reach a full screen of text under ansi-term (i.e. once I've typed
in a few commands and the history of these commands fills the screen, so
that the input line is now at the bottom of the screen), the whole
screen seems to either flash or jump every time I type a new character.

SECOND GLITCH

After I've either filled the screen using my own commands, or after I've
used a programme such as top or mutt which takes over the whole screen,
then the two lines at the top of the screen seem to persist. Running the
"clear" command does not clear them, but they are cleared if I run the
"reset" command.

You can see a download a video (7.6MB) of these glitches from:
http://cloud.geoffreyferrari.com/apps/files_sharing/get.php?token=db8e2a6726e03d1816548e17447a1df626215ac4

Both of these problems occur on both the latest 64-bit versions of ubuntu and
debian wheezy. With the terminal version of emacs I get the second
problem (lines being left at the top of the screen) but not the first
(no display jumpiness).

My version of emacs as reported in Ubuntu 11.10 is

"GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.5)
 of 2011-08-14 on allspice, modified by Debian"

I wonder if there's anything I can do to remove these annoying glitches,
of whether they are a bug that should be reported.

Geoff

Re: Emacs+Ansi-Term Display Glitches

[Vladimir Murzin]

Hi Geoff

In my case (Gnome2+Metacity ) the following was enough:

$gconftool-2 --type boolean --set
/apps/metacity/general/compositing_manager false

My environment:
GNU Emacs 23.3.3
Gnome 2.32.1

On Mon, Jan 2, 2012 at 8:33 PM, Geoff Ferrari <geoffrey.ferrari@me.com> wrote:
> I tried disabling composite manager by adding the following to /etc/X11/xorg.conf
>
> Section "Extensions"
>    Option "Composite" "Disable"
> EndSection
>
> But it had no effect on the display glitches I mentioned. Any other
> suggestions?
>
> Maybe this bug will be solved in Emacs 24...
>
> Geoffrey
>
>
> On Tue, Dec 27, 2011 at 02:51:51AM +0000, Vladimir Murzin wrote:
>> Hi!
>>
>> Have you tried disabling composite manager?
>>
>> I met similar problem several months ago. Turning of composite feature of Metacity solved this problem for me.
>> Best wishes, Vladimir Murzin
>>
>> -----Original Message-----
>> From: Geoff Ferrari <geoffrey.ferrari@me.com>
>> Sender: help-gnu-emacs-bounces+murzin.v=gmail.com@gnu.orgDate: Mon, 26 Dec 2011 15:30:48
>> To: <help-gnu-emacs@gnu.org>
>> Cc: <bug-gnu-emacs@gnu.org>
>> Subject: Emacs+Ansi-Term Display Glitches
>>
>> Hi,
>>
>> I'm experiencing some display glitches when using ansi-term to access a
>> shell under the X11 version of emacs. There seem to be two separate
>> glitches, and they're a little hard to describe so I've included a link
>> to a video of the problem.
>>
>> FIRST GLITCH
>>
>> When I reach a full screen of text under ansi-term (i.e. once I've typed
>> in a few commands and the history of these commands fills the screen, so
>> that the input line is now at the bottom of the screen), the whole
>> screen seems to either flash or jump every time I type a new character.
>>
>> SECOND GLITCH
>>
>> After I've either filled the screen using my own commands, or after I've
>> used a programme such as top or mutt which takes over the whole screen,
>> then the two lines at the top of the screen seem to persist. Running the
>> "clear" command does not clear them, but they are cleared if I run the
>> "reset" command.
>>
>> You can see a download a video (7.6MB) of these glitches from:
>> http://cloud.geoffreyferrari.com/apps/files_sharing/get.php?token=db8e2a6726e03d1816548e17447a1df626215ac4
>>
>> Both of these problems occur on both the latest 64-bit versions of ubuntu and
>> debian wheezy. With the terminal version of emacs I get the second
>> problem (lines being left at the top of the screen) but not the first
>> (no display jumpiness).
>>
>> My version of emacs as reported in Ubuntu 11.10 is
>>
>> "GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.5)
>>  of 2011-08-14 on allspice, modified by Debian"
>>
>> I wonder if there's anything I can do to remove these annoying glitches,
>> of whether they are a bug that should be reported.
>>
>> Geoff
>>
>>
>>
>
> --
> Geoffrey Ferrari
> Lecturer in Philosophy
> Lady Margaret Hall
>
> Office: 01865 [2]74381
> Mobile: 07989 851364
> web: geoffreyferrari.com

Re: Emacs+Ansi-Term Display Glitches

[Geoff Ferrari]

Hi Vladimir,

Sincere thanks for your suggestions. I checked and the configuration value on my
machine for /apps/metacity/general/compositing_manager was already set
to false. Changing to true didn't help either.

Incidentally, my usual window manager is stumpwm and I get the display
glitches there, too, so it might not be a problem with metacity in
particular.

One thing that helps the first glitch (the jumpiness when one has a full
screen of output) is switching from char-mode to line-mode. There's
still some jumpiness, but it seems reduced.

Best wishes,

Geoff

On Mon, Jan 02, 2012 at 07:45:24PM +0300, Vladimir Murzin wrote:
> Hi Geoff
> 
> In my case (Gnome2+Metacity ) the following was enough:
> 
> $gconftool-2 --type boolean --set
> /apps/metacity/general/compositing_manager false
> 
> My environment:
> GNU Emacs 23.3.3
> Gnome 2.32.1
> 
> On Mon, Jan 2, 2012 at 8:33 PM, Geoff Ferrari <geoffrey.ferrari@me.com> wrote:
> > I tried disabling composite manager by adding the following to /etc/X11/xorg.conf
> >
> > Section "Extensions"
> >    Option "Composite" "Disable"
> > EndSection
> >
> > But it had no effect on the display glitches I mentioned. Any other
> > suggestions?
> >
> > Maybe this bug will be solved in Emacs 24...
> >
> > Geoffrey
> >
> >
> > On Tue, Dec 27, 2011 at 02:51:51AM +0000, Vladimir Murzin wrote:
> >> Hi!
> >>
> >> Have you tried disabling composite manager?
> >>
> >> I met similar problem several months ago. Turning of composite feature of Metacity solved this problem for me.
> >> Best wishes, Vladimir Murzin
> >>
> >> -----Original Message-----
> >> From: Geoff Ferrari <geoffrey.ferrari@me.com>
> >> Sender: help-gnu-emacs-bounces+murzin.v=gmail.com@gnu.orgDate: Mon, 26 Dec 2011 15:30:48
> >> To: <help-gnu-emacs@gnu.org>
> >> Cc: <bug-gnu-emacs@gnu.org>
> >> Subject: Emacs+Ansi-Term Display Glitches
> >>
> >> Hi,
> >>
> >> I'm experiencing some display glitches when using ansi-term to access a
> >> shell under the X11 version of emacs. There seem to be two separate
> >> glitches, and they're a little hard to describe so I've included a link
> >> to a video of the problem.
> >>
> >> FIRST GLITCH
> >>
> >> When I reach a full screen of text under ansi-term (i.e. once I've typed
> >> in a few commands and the history of these commands fills the screen, so
> >> that the input line is now at the bottom of the screen), the whole
> >> screen seems to either flash or jump every time I type a new character.
> >>
> >> SECOND GLITCH
> >>
> >> After I've either filled the screen using my own commands, or after I've
> >> used a programme such as top or mutt which takes over the whole screen,
> >> then the two lines at the top of the screen seem to persist. Running the
> >> "clear" command does not clear them, but they are cleared if I run the
> >> "reset" command.
> >>
> >> You can see a download a video (7.6MB) of these glitches from:
> >> http://cloud.geoffreyferrari.com/apps/files_sharing/get.php?token=db8e2a6726e03d1816548e17447a1df626215ac4
> >>
> >> Both of these problems occur on both the latest 64-bit versions of ubuntu and
> >> debian wheezy. With the terminal version of emacs I get the second
> >> problem (lines being left at the top of the screen) but not the first
> >> (no display jumpiness).
> >>
> >> My version of emacs as reported in Ubuntu 11.10 is
> >>
> >> "GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.5)
> >>  of 2011-08-14 on allspice, modified by Debian"
> >>
> >> I wonder if there's anything I can do to remove these annoying glitches,
> >> of whether they are a bug that should be reported.
> >>
> >> Geoff
> >>
> >>
> >>
> >
> > --
> > Geoffrey Ferrari
> > Lecturer in Philosophy
> > Lady Margaret Hall
> >
> > Office: 01865 [2]74381
> > Mobile: 07989 851364
> > web: geoffreyferrari.com

-- 
Geoffrey Ferrari
Lecturer in Philosophy
Lady Margaret Hall

Office: 01865 [2]74381
Mobile: 07989 851364
web: geoffreyferrari.com