[SOLVED] Slackware 14.2: Emacs doesn't start when Internet is off

drgibbon · 10-25-2016, 07:25 PM

Quote:

Originally Posted by usr345

no, doesn't start without the Internet connection.

Code:

# For loopbacking.
127.0.0.1               localhost
127.0.0.1               phpmyadmin
127.0.0.1               dubai
127.0.0.1               lwt
192.168.1.4             asus.asus asus
93.184.220.75           static1.dmcdn.net
208.64.123.130          bitcoin.org

# End of hosts.

What's in /etc/HOSTNAME ? Also I found some info at StackExchange that might be relevant;

Quote:

One slow startup problem is usually that you don't have your machines fully qualified hostname declared in /etc/hosts which causes emacs to hang at some syscall during startup. However, that would not explain why emacs is faster than emacs -Q.
[...]
I had the same problem and solved it by adding machine name (not fully qualified) to /etc/hosts as a synonym for localhost. strace revealed that it used before 5 seconds opening an IP connection and another 4+4 seconds in two ioctls and still some seconds in other handling of these connections. Now it starts immediately

usr345 · 10-26-2016, 12:09 AM

Quote:

Originally Posted by asdrubale

maybe you have to add

Code:

127.0.0.1   host.does.not.exist

to /etc/hosts

Tried, didn't help. But it seems, that this is the right way of investigation at least. Today when I launched GUI Emacs after some time I got a popup with the following message:

Quote:

The authenticity of host 'host.does.not.exist (127.0.0.1)' can't be established. ECDSA key fingerprint is SHA256:<hex code>. Are you sure want to continue connecting?

So, it's tramp trying to connect to my local machine for some reason.

a4z · 10-26-2016, 12:24 AM

have you tried to remove (rename) your .emacs.d , or what you use for emacs,
maybe there is some auto install update melpa other package manager configured that tries to get info from the net
did you tried to use emacs clean?

usr345 · 10-26-2016, 01:20 AM

Quote:

Originally Posted by a4z

have you tried to remove (rename) your .emacs.d , or what you use for emacs,
maybe there is some auto install update melpa other package manager configured that tries to get info from the net
did you tried to use emacs clean?

Yes, I renamed both .emacs and .emacs.d --- didn't help.

asdrubale · 10-26-2016, 03:46 PM

Quote:

Originally Posted by usr345

Tried, didn't help. But it seems, that this is the right way of investigation at least. Today when I launched GUI Emacs after some time I got a popup with the following message:

So, it's tramp trying to connect to my local machine for some reason.

you could try with an IP address which belongs to the same subnet of your PC but is not used by any other PC, e.g. 192.168.1.253. I had the same problem a year ago and now in my /etc/host there is the following line:

Code:

192.168.1.253   host.does.not.exist

but I can't remember why I chose that address...

usr345 · 10-26-2016, 11:14 PM

Quote:

Originally Posted by asdrubale

you could try with an IP address which belongs to the same subnet of your PC but is not used by any other PC, e.g. 192.168.1.253. I had the same problem a year ago and now in my /etc/host there is the following line:

Code:

192.168.1.253   host.does.not.exist

Tried, didn't help.

Richard Cranium · 10-26-2016, 11:38 PM

Quote:

Originally Posted by usr345

So, it's tramp trying to connect to my local machine for some reason.

Unplug cable. Start emacs with the "--debug-init" command line option. Hit ctrl-G after 5 minutes. Give stacktrace.

usr345 · 10-27-2016, 10:24 AM

Quote:

Originally Posted by Richard Cranium

Unplug cable. Start emacs with the "--debug-init" command line option. Hit ctrl-G after 5 minutes. Give stacktrace.

Tried it. It gave just the info about successfully loading my packages:

Quote:

Loading /home/usr345/.emacs.d/bootstrap-init.el (source)...
Loading ~/.emacs.d/functions...done
Loading /home/usr345/.emacs.d/accounting.el (source)...done
Loading /home/usr345/.emacs.d/bookmarks.el (source)...done
Loading /home/usr345/.emacs.d/dired.el (source)...
Loading /home/usr345/.emacs.d/filesets-cache.el (source)...done
Accessing directories in Dired will REUSE the buffer
Loading /home/usr345/.emacs.d/dired.el (source)...done
Loading /home/usr345/.emacs.d/cperl.el (source)...done
Loading /home/usr345/.emacs.d/css.el (source)...done
Loading /home/usr345/.emacs.d/eshell.el (source)...done
Loading /home/usr345/.emacs.d/html-mode.el (source)...done
Loading /home/usr345/.emacs.d/kb_shortcuts.el (source)...done
Loading /home/usr345/.emacs.d/latex.el (source)...done
Loading /home/usr345/.emacs.d/php.el (source)...
Loading /home/usr345/.emacs.d/php-functions.el (source)...done
Loading /home/usr345/.emacs.d/php.el (source)...done
Loading /home/usr345/.emacs.d/javascript.el (source)...done
Loading /home/usr345/.emacs.d/elisp.el (source)...done
Loading /home/usr345/.emacs.d/org-mode.el (source)...done
Loading /home/usr345/.emacs.d/sql-mode.el (source)...
Loading sql...done
Loading /home/usr345/.emacs.d/local_databases.el (source)...done
Loading /home/usr345/.emacs.d/sql-mode.el (source)...done
Loading tagging...done
Loading /home/usr345/.emacs.d/plugins/yasnippet/yasnippet.el (source)...done
[yas] Prepared just-in-time loading for ~/.emacs.d/yasnippets
[yas] Reloaded everything (snippets will load just-in-time)....
Loading cua-base...done
Loading /home/usr345/.emacs.d/bootstrap-init.el (source)...done
[yas] Loading for `emacs-lisp-mode', just-in-time: (lambda nil (yas--load-directory-1 (quote /home/usr345/.emacs.d/yasnippets/emacs-lisp-mode) (quote emacs-lisp-mode)))!
[yas] Loading compiled snippets from /home/usr345/.emacs.d/yasnippets/emacs-lisp-mode
Loading /home/usr345/.emacs.d/yasnippets/emacs-lisp-mode/.yas-compiled-snippets.el (source)...done
[yas] Loading snippet files from /home/usr345/.emacs.d/yasnippets/emacs-lisp-mode
For information about GNU Emacs and the GNU system, type C-h C-a.
Package iswitchb is obsolete!
Quit

number22 · 10-27-2016, 10:43 AM

Do you use yp for user and any firewall rule on local client? local host's 127.0.0.1 has to connect to yp server.

drgibbon · 10-27-2016, 10:49 AM

So does the machine hostname (in /etc/HOSTNAME) have an entry in /etc/hosts ?

Also, you could perhaps try the idea from StackExchange (running it under strace)

Code:

strace -o /tmp/foo emacs -Q -nw

and see what's in /tmp/foo while it's hanging.

drgibbon · 10-27-2016, 11:42 AM

Also, there's no strange zombie processes are there? If you

Code:

killall emacs

first do you get anywhere?

number22 · 10-27-2016, 11:45 AM

Do you use any rpc services? rpc binding port can be connected to 127.0.0.1 as well.

usr345 · 10-27-2016, 12:40 PM

Quote:

Originally Posted by drgibbon

So does the machine hostname (in /etc/HOSTNAME) have an entry in /etc/hosts ?

Also, you could perhaps try the idea from StackExchange (running it under strace)

Code:

strace -o /tmp/foo emacs -Q -nw

and see what's in /tmp/foo while it's hanging.

No, it doesn't. /etc/HOSTNAME has:

Quote:

laptop.local

Which is not present in /etc/ hosts

Here is the trace (seems that it tries to connect to laptop):

Quote:

socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.1")}, 16) = 0
poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}])
send(4, "\346k\1\0\0\1\0\0\0\0\0\0\6laptop\5local\0\0\34\0\1", 30, MSG_NOSIGNAL) = 30
poll([{fd=4, events=POLLIN}], 1, 5000) = 0 (Timeout)
poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}])
send(4, "\346k\1\0\0\1\0\0\0\0\0\0\6laptop\5local\0\0\34\0\1", 30, MSG_NOSIGNAL) = 30
poll([{fd=4, events=POLLIN}], 1, 5000) = 0 (Timeout)
close(4) = 0

It repeats again and again.

usr345 · 10-27-2016, 12:42 PM

Hurray! After adding:

Quote:

127.0.0.1 laptop

to /etc/hosts it started to work. Thank you, drgibbon, sir.

atelszewski · 10-27-2016, 12:51 PM

Hi,

Quote:

Originally Posted by usr345

Hurray! After adding:

Quote:

laptop 127.0.0.1

to /etc/hosts it started to work. Thank you, drgibbon, sir.

This does not look like a correct entry for /etc/hosts (i.e. IP address should be first).

--
Best regards,
Andrzej Telszewski