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* bug#21682: 25.0.50; display bug
@ 2015-10-13 23:37 Richard Stallman
  2015-10-14  7:52 ` Andreas Schwab
  0 siblings, 1 reply; 12+ messages in thread
From: Richard Stallman @ 2015-10-13 23:37 UTC (permalink / raw)
  To: 21682

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In emacs -Q, do C-u M-x rmail RET foo RET with the data below in file
foo.  It messes up display on my terminal -- characters appear
on the wrong screen line.


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In GNU Emacs 25.0.50.1 (i686-pc-linux-gnu, GTK+ Version 2.24.23)
 of 2015-08-12 on freetop
Repository revision: 79a169684dfad2c0bbb9fdbae539c1f30d9f0ac3
System Description:	Trisquel GNU/Linux 7.0, Belenos

Configured using:
 `configure 'CFLAGS=-g -O0''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GCONF GSETTINGS NOTIFY
LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK2 X11

Important settings:
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  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
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  auto-encryption-mode: t
  auto-compression-mode: t
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Recent messages:
Showing message 830...done
Mark set
Mark saved where search started
Mark set
Quit
Mark activated
File /home/rms/foo already exists; overwrite anyway? (y or n) y
Wrote /home/rms/foo
Quit
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Load-path shadows:
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Memory information:
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[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]


-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.


^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-13 23:37 bug#21682: 25.0.50; display bug Richard Stallman
@ 2015-10-14  7:52 ` Andreas Schwab
  2015-10-14 16:46   ` Eli Zaretskii
  2015-10-15  1:24   ` Richard Stallman
  0 siblings, 2 replies; 12+ messages in thread
From: Andreas Schwab @ 2015-10-14  7:52 UTC (permalink / raw)
  To: Richard Stallman; +Cc: 21682

Richard Stallman <rms@gnu.org> writes:

> In emacs -Q, do C-u M-x rmail RET foo RET with the data below in file
> foo.  It messes up display on my terminal -- characters appear
> on the wrong screen line.

Which terminal?  I see no artefacts in konsole, so it's more likely a
bug in the terminal you use.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."





^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-14  7:52 ` Andreas Schwab
@ 2015-10-14 16:46   ` Eli Zaretskii
  2015-10-15  1:25     ` Richard Stallman
  2015-10-15  1:24   ` Richard Stallman
  1 sibling, 1 reply; 12+ messages in thread
From: Eli Zaretskii @ 2015-10-14 16:46 UTC (permalink / raw)
  To: Andreas Schwab; +Cc: rms, 21682

> From: Andreas Schwab <schwab@suse.de>
> Date: Wed, 14 Oct 2015 09:52:27 +0200
> Cc: 21682@debbugs.gnu.org
> 
> Richard Stallman <rms@gnu.org> writes:
> 
> > In emacs -Q, do C-u M-x rmail RET foo RET with the data below in file
> > foo.  It messes up display on my terminal -- characters appear
> > on the wrong screen line.
> 
> Which terminal?  I see no artefacts in konsole

Neither do I in PuTTY, which emulates xterm.

Richard, if you disable auto-composition-mode, does that help?





^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-14  7:52 ` Andreas Schwab
  2015-10-14 16:46   ` Eli Zaretskii
@ 2015-10-15  1:24   ` Richard Stallman
  2015-10-15  7:04     ` Andreas Schwab
  1 sibling, 1 reply; 12+ messages in thread
From: Richard Stallman @ 2015-10-15  1:24 UTC (permalink / raw)
  To: Andreas Schwab; +Cc: 21682

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > > In emacs -Q, do C-u M-x rmail RET foo RET with the data below in file
  > > foo.  It messes up display on my terminal -- characters appear
  > > on the wrong screen line.

  > Which terminal?  I see no artefacts in konsole, so it's more likely a
  > bug in the terminal you use.

I am using a Linux terminal.

Emacs needs to cope with it, unless we can get it fixed.

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.






^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-14 16:46   ` Eli Zaretskii
@ 2015-10-15  1:25     ` Richard Stallman
  0 siblings, 0 replies; 12+ messages in thread
From: Richard Stallman @ 2015-10-15  1:25 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: schwab, 21682

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > Richard, if you disable auto-composition-mode, does that help?

The bug does not happen when auto-composition-mode is disabled.

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.






^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-15  1:24   ` Richard Stallman
@ 2015-10-15  7:04     ` Andreas Schwab
  2015-10-15 16:35       ` Eli Zaretskii
  2015-10-16 15:57       ` Richard Stallman
  0 siblings, 2 replies; 12+ messages in thread
From: Andreas Schwab @ 2015-10-15  7:04 UTC (permalink / raw)
  To: Richard Stallman; +Cc: 21682

Richard Stallman <rms@gnu.org> writes:

> Emacs needs to cope with it, unless we can get it fixed.

Emacs cannot know how characters are drawn on a tty.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."





^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-15  7:04     ` Andreas Schwab
@ 2015-10-15 16:35       ` Eli Zaretskii
  2015-10-15 17:07         ` Andreas Schwab
  2015-10-16 15:58         ` Richard Stallman
  2015-10-16 15:57       ` Richard Stallman
  1 sibling, 2 replies; 12+ messages in thread
From: Eli Zaretskii @ 2015-10-15 16:35 UTC (permalink / raw)
  To: Andreas Schwab, Kenichi Handa; +Cc: rms, 21682

> From: Andreas Schwab <schwab@suse.de>
> Date: Thu, 15 Oct 2015 09:04:24 +0200
> Cc: 21682@debbugs.gnu.org
> 
> Richard Stallman <rms@gnu.org> writes:
> 
> > Emacs needs to cope with it, unless we can get it fixed.
> 
> Emacs cannot know how characters are drawn on a tty.

Does that mean you understood what causes Richard's problem?  If so,
can you explain?

I thought asking Richard for dribble files in both cases, but if you
already understand what's going on, there would be no need.

I actually don't understand why we have auto-composition-mode turned
on for TTY frames, and where do we take the data for composing
characters there (there's no font back-end).  Kenichi, can you
explain, please?

Thanks.





^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-15 16:35       ` Eli Zaretskii
@ 2015-10-15 17:07         ` Andreas Schwab
  2015-10-15 17:16           ` Eli Zaretskii
  2015-10-16 15:58         ` Richard Stallman
  1 sibling, 1 reply; 12+ messages in thread
From: Andreas Schwab @ 2015-10-15 17:07 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: rms, 21682

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Andreas Schwab <schwab@suse.de>
>> Date: Thu, 15 Oct 2015 09:04:24 +0200
>> Cc: 21682@debbugs.gnu.org
>> 
>> Richard Stallman <rms@gnu.org> writes:
>> 
>> > Emacs needs to cope with it, unless we can get it fixed.
>> 
>> Emacs cannot know how characters are drawn on a tty.
>
> Does that mean you understood what causes Richard's problem?  If so,
> can you explain?

The terminal has to support composition.  The Linux console doesn't.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."





^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-15 17:07         ` Andreas Schwab
@ 2015-10-15 17:16           ` Eli Zaretskii
  0 siblings, 0 replies; 12+ messages in thread
From: Eli Zaretskii @ 2015-10-15 17:16 UTC (permalink / raw)
  To: Andreas Schwab; +Cc: rms, 21682

> From: Andreas Schwab <schwab@suse.de>
> Cc: Kenichi Handa <handa@gnu.org>,  rms@gnu.org,  21682@debbugs.gnu.org
> Date: Thu, 15 Oct 2015 19:07:05 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: Andreas Schwab <schwab@suse.de>
> >> Date: Thu, 15 Oct 2015 09:04:24 +0200
> >> Cc: 21682@debbugs.gnu.org
> >> 
> >> Richard Stallman <rms@gnu.org> writes:
> >> 
> >> > Emacs needs to cope with it, unless we can get it fixed.
> >> 
> >> Emacs cannot know how characters are drawn on a tty.
> >
> > Does that mean you understood what causes Richard's problem?  If so,
> > can you explain?
> 
> The terminal has to support composition.  The Linux console doesn't.

Ah, I see, thanks.

So maybe we should only turn on auto-composition-mode in
terminal-specific files like term/xterm.el?





^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-15  7:04     ` Andreas Schwab
  2015-10-15 16:35       ` Eli Zaretskii
@ 2015-10-16 15:57       ` Richard Stallman
  1 sibling, 0 replies; 12+ messages in thread
From: Richard Stallman @ 2015-10-16 15:57 UTC (permalink / raw)
  To: Andreas Schwab; +Cc: 21682

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > > Emacs needs to cope with it, unless we can get it fixed.

  > Emacs cannot know how characters are drawn on a tty.

It can, and it does -- with the help of termcap.

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.






^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-15 16:35       ` Eli Zaretskii
  2015-10-15 17:07         ` Andreas Schwab
@ 2015-10-16 15:58         ` Richard Stallman
  2015-10-16 16:14           ` Eli Zaretskii
  1 sibling, 1 reply; 12+ messages in thread
From: Richard Stallman @ 2015-10-16 15:58 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: schwab, 21682

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > I thought asking Richard for dribble files in both cases, but if you
  > already understand what's going on, there would be no need.

I sent a very simple reproducible test case -- better than a dribble
file.  Did you mean a termscript file?

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.






^ permalink raw reply	[flat|nested] 12+ messages in thread

* bug#21682: 25.0.50; display bug
  2015-10-16 15:58         ` Richard Stallman
@ 2015-10-16 16:14           ` Eli Zaretskii
  0 siblings, 0 replies; 12+ messages in thread
From: Eli Zaretskii @ 2015-10-16 16:14 UTC (permalink / raw)
  To: rms; +Cc: schwab, 21682

> From: Richard Stallman <rms@gnu.org>
> CC: schwab@suse.de, handa@gnu.org, 21682@debbugs.gnu.org
> Date: Fri, 16 Oct 2015 11:58:47 -0400
> 
>   > I thought asking Richard for dribble files in both cases, but if you
>   > already understand what's going on, there would be no need.
> 
> I sent a very simple reproducible test case -- better than a dribble
> file.

I don't see the problem on fencepost accessed via PuTTY.

> Did you mean a termscript file?

Yes, sorry.  But now that Andreas explained the problem, there's no
need.





^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2015-10-16 16:14 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-10-13 23:37 bug#21682: 25.0.50; display bug Richard Stallman
2015-10-14  7:52 ` Andreas Schwab
2015-10-14 16:46   ` Eli Zaretskii
2015-10-15  1:25     ` Richard Stallman
2015-10-15  1:24   ` Richard Stallman
2015-10-15  7:04     ` Andreas Schwab
2015-10-15 16:35       ` Eli Zaretskii
2015-10-15 17:07         ` Andreas Schwab
2015-10-15 17:16           ` Eli Zaretskii
2015-10-16 15:58         ` Richard Stallman
2015-10-16 16:14           ` Eli Zaretskii
2015-10-16 15:57       ` Richard Stallman

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