bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Tim Fischbach]

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Hi!

I am facing the exact problem described in

  https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26289

on both Emacs 25.3.2 and 24.5.1 also via `emacs -Q`.
When running emacs inside the terminal via `emacs -nw` the problem does not
occur.

Regards,
Tim

In GNU Emacs 25.3.2 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
 of 2017-09-12 built on lcy01-32
Windowing system distributor 'The X.Org Foundation', version 11.0.11804000
System Description: Ubuntu 16.04.3 LTS

Configured using:
 'configure --build=x86_64-linux-gnu --prefix=/usr
 '--includedir=${prefix}/include' '--mandir=${prefix}/share/man'
 '--infodir=${prefix}/share/info' --sysconfdir=/etc --localstatedir=/var
 --disable-silent-rules '--libdir=${prefix}/lib/x86_64-linux-gnu'
 '--libexecdir=${prefix}/lib/x86_64-linux-gnu' --disable-maintainer-mode
 --disable-dependency-tracking --prefix=/usr --sharedstatedir=/var/lib
 --program-suffix=25 --with-modules --with-x=yes --with-x-toolkit=gtk3
 'CFLAGS=-g -O2 -fstack-protector-strong -Wformat
 -Werror=format-security' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'
 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 MODULES

Important settings:
  value of $LANG: de_DE.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
gui-get-primary-selection: No selection is available

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu
cl-loaddefs pcase cl-lib mail-prsvr mail-utils time-date mule-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt
fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)

Memory information:
((conses 16 87773 6169)
 (symbols 48 19852 0)
 (miscs 40 269 107)
 (strings 32 14685 4070)
 (string-bytes 1 425584)
 (vectors 16 12003)
 (vector-slots 8 436013 5055)
 (floats 8 166 28)
 (intervals 56 230 0)
 (buffers 976 18)
 (heap 1024 32330 891))

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bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Eli Zaretskii]

> From: Tim Fischbach <mail@timfischbach.de>
> Date: Fri, 09 Mar 2018 09:33:57 +0000
> 
> I am facing the exact problem described in 
> 
>   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26289
> 
> on both Emacs 25.3.2 and 24.5.1 also via `emacs -Q`. 
> When running emacs inside the terminal via `emacs -nw` the problem does not occur.

Thanks, but unless you can provide a reproducible recipe starting with
"emacs -Q", this report doesn't help us to find the reason and fix it,
exactly like bug#26289 didn't.

bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Noam Postavsky]

unarchive 26289
reopen 26289
merge 30758 29063 26289
quit

Tim Fischbach <mail@timfischbach.de> writes:

> I am facing the exact problem described in 
>
>   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26289
>
> on both Emacs 25.3.2 and 24.5.1 also via `emacs -Q`. 
> When running emacs inside the terminal via `emacs -nw` the problem
> does not occur.

Do you see the same symptoms described in
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29063#17

    I have also noticed that, with toggle-debug-on-quit on, just typing C-g
    while in the normal writing buffer will always send me to the debugger on
    only one line:

    Debugger entered--Lisp error: (quit)
      internal-timer-start-idle()

    This happens in the broken emacs only, and C-g here does nothing in the
    working emacs. Likewise, in the broken emacs, while I am highlighting text
    with C-space, C-g will 50% of the time cancel the highlight and 50% of the
    time open the above debugger on the timer start function.

bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Tim Fischbach]

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1) emacs -Q
2) M-x
3) C-g

reproduces the error every time on my machine. Holding C-g for a couple of
seconds fixes the problem. Also Esc Esc Esc still works. Even C-S-g works,
even though describe-key translates it to C-g. I really think this might be
a problem with Ubuntu Unity somehow rebinding or blocking C-g.

Using toogle-debug-on-quit with my normal config, I was able to trigger

  Debugger entered--Lisp error: (quit)

without any further info or

  Debugger entered--Lisp error: (quit)
  read-event(nil t 2)
  sit-for(2)
  execute-extended-command(nil "toggle-debug-on-quit" nil)
  funcall-interactively(execute-extended-command nil "toggle-debug-on-quit" nil)
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)

This was NOT reproducible with `emacs -Q`, though.

On Sat, 10 Mar 2018 at 04:05 Noam Postavsky <npostavs@gmail.com> wrote:

> unarchive 26289
> reopen 26289
> merge 30758 29063 26289
> quit
>
> Tim Fischbach <mail@timfischbach.de> writes:
>
> > I am facing the exact problem described in
> >
> >   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26289
> >
> > on both Emacs 25.3.2 and 24.5.1 also via `emacs -Q`.
> > When running emacs inside the terminal via `emacs -nw` the problem
> > does not occur.
>
> Do you see the same symptoms described in
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29063#17
>
>     I have also noticed that, with toggle-debug-on-quit on, just typing C-g
>     while in the normal writing buffer will always send me to the debugger
> on
>     only one line:
>
>     Debugger entered--Lisp error: (quit)
>       internal-timer-start-idle()
>
>     This happens in the broken emacs only, and C-g here does nothing in the
>     working emacs. Likewise, in the broken emacs, while I am highlighting
> text
>     with C-space, C-g will 50% of the time cancel the highlight and 50% of
> the
>     time open the above debugger on the timer start function.
>

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bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Glenn Morris]

Tim Fischbach wrote:

> I really think this might be a problem with Ubuntu Unity somehow
> rebinding or blocking C-g.

Searching finds:

https://askubuntu.com/questions/741657/unity-somehow-captures-controlg-from-emacs

   if I disable Show location of pointer for the mouse in
   gnome-tweak-tools, C-g is passed through correctly.

bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Tim Fischbach]

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Unfortunately that option was already disabled on my system. But it has to
be something like this.

Thanks

On Mon, 12 Mar 2018 at 16:43 Glenn Morris <rgm@gnu.org> wrote:

> Tim Fischbach wrote:
>
> > I really think this might be a problem with Ubuntu Unity somehow
> > rebinding or blocking C-g.
>
> Searching finds:
>
>
> https://askubuntu.com/questions/741657/unity-somehow-captures-controlg-from-emacs
>
>    if I disable Show location of pointer for the mouse in
>    gnome-tweak-tools, C-g is passed through correctly.
>

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bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Glenn Morris]

Tim Fischbach wrote:

> Unfortunately that option was already disabled on my system. But it has to
> be something like this.

Maybe try disabling any window manager keyboard shortcut that uses the
ctrl key?

BTW, just to be explicit, seems everyone reporting this uses Ubuntu 16.04.

bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Noam Postavsky]

Tim Fischbach <mail@timfischbach.de> writes:

> Unfortunately that option was already disabled on my system. But it
> has to be something like this.

Does describe-key-briefly (<f1> c C-g), or view-lossage (<f1> l) suggest
that Emacs can recognize the C-g, or does it see some other keystroke?

bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Tim Fischbach]

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Interesting. I did not know about view-lossage.

<f1> c C-g just briefly displays "Quit" and exits minibuffer. When running
"emacs -nw -Q" from a terminal, the same key is described correctly as
keyboard-quit.

After trying to exit C-x C-f with C-g, nothing shows up in view-lossage.
When I hold C-g for a couple of seconds, focus goes back to the buffer as
expected and "C-g [abort-recursive-edit]" shows up in view-lossage.

When hitting C-g while inside a buffer, view-lossage displays "C-g
[keyboard-quit]" correctly, though, which I would not expect if Ubuntu kept
Emacs from receiving keyboard events correctly.



On Tue, 13 Mar 2018 at 02:12 Noam Postavsky <npostavs@gmail.com> wrote:

> Tim Fischbach <mail@timfischbach.de> writes:
>
> > Unfortunately that option was already disabled on my system. But it
> > has to be something like this.
>
> Does describe-key-briefly (<f1> c C-g), or view-lossage (<f1> l) suggest
> that Emacs can recognize the C-g, or does it see some other keystroke?
>

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bug#26289: bug#30758: 25.3; Cannot exit minibuffer with C-g when opening file or switching buffers

[Lars Ingebrigtsen]

Noam Postavsky <npostavs@gmail.com> writes:

> Do you see the same symptoms described in
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29063#17

More information was requested, but no response was given within a
year, so I'm closing this bug report.  If the problem still exists,
please reopen this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no