Arch Linux

AmagicalFishy

Member

Registered: 2016-12-10

Posts: 69

Not sure how to begin troubleshooting this: Programs not opening

This happens quite randomly.

I'll hit Ctrl + R and type "Firefox" (I use Aweosme-WM), try to open Slack, a terminal, or anything. My cursor turns into a little loading icon, as usual, but then nothing ever opens. I have to restart my computer to get things working. This has never happened before, but began happening after I installed LAMP—I'm not sure if the two are related.

How can I start troubleshooting this problem?

I looked at the ``httpd`` error logs, but I'm not sure if these occurred before or after my restart (since I couldn't look at the error logs before said restart). Furthermore, I'm not even sure if my installation of LAMP has anything to do with this.

[Thu Nov 23 05:25:21.805454 2017] [mpm_prefork:notice] [pid 447] AH00170: caught SIGWINCH, shutting down gracefully
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/pdo_sqlite.so' - /usr/lib/php/modules/pdo_sqlite.so: cannot open shared object file: No such file or directory in Unknown on line 0
[Thu Nov 23 05:26:08.602620 2017] [mpm_prefork:notice] [pid 448] AH00163: Apache/2.4.29 (Unix) PHP/7.1.11 configured -- resuming normal operations
[Thu Nov 23 05:26:08.602693 2017] [core:notice] [pid 448] AH00094: Command line: '/usr/bin/httpd -D FOREGROUND'

Would someone mind helping me?

Docbroke

Member

From: India

Registered: 2015-06-13

Posts: 1,433

Re: Not sure how to begin troubleshooting this: Programs not opening

Keep one terminal window open and when you start getting this problem, try starting programs from terminal. That should give you some useful error message.

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WorMzy

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From: Scotland

Registered: 2010-06-16

Posts: 11,858

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Re: Not sure how to begin troubleshooting this: Programs not opening

Check your journal for any messages around the time the problem started.

Also, please post the output of 'hostnamectl'.

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Mr.Elendig

#archlinux@freenode channel op

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Registered: 2004-11-07

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Re: Not sure how to begin troubleshooting this: Programs not opening

Your LAMP install is unlikely to have anything to do with it unless you did really silly things when you installed it.

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AmagicalFishy

Member

Registered: 2016-12-10

Posts: 69

Re: Not sure how to begin troubleshooting this: Programs not opening

Check your journal for any messages around the time the problem started.

Also, please post the output of 'hostnamectl'.

   Static hostname: localhost
         Icon name: computer-laptop
           Chassis: laptop
        Machine ID: 36d08a61475841069fac1abda449193c
           Boot ID: ed69a815b3a246fbaca92b1ed8f2b42e
  Operating System: Arch Linux
            Kernel: Linux 4.13.12-1-ARCH
      Architecture: x86-64

Also, keeping a terminal open is a good idea. I'll do that and report back next it happens.

jasonwryan

Anarchist

From: .nz

Registered: 2009-05-09

Posts: 30,424

Website

Re: Not sure how to begin troubleshooting this: Programs not opening

https://wiki.archlinux.org/index.php/Ne … e_hostname

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AmagicalFishy

Member

Registered: 2016-12-10

Posts: 69

Re: Not sure how to begin troubleshooting this: Programs not opening

Keep one terminal window open and when you start getting this problem, try starting programs from terminal. That should give you some useful error message.

So, it happened again and I recorded the error I'm getting in a terminal:

[me@localhost ~]$ google-chrome-stable
Invalid MIT-MAGIC-COOKIE-1 key
(google-chrome:10310): Gtk-WARNING **: cannot open display: :0
[me@localhost ~]$ firefox
Invalid MIT-MAGIC-COOKIE-1 keyUnable to init server: Could not connect: Connection refused
Error: cannot open display: :0
[me@localhost ~]$ slack
Invalid MIT-MAGIC-COOKIE-1 key[javi@localhost ~]$ 

*And* I was able to figure out when the problem happens—whenever I close/reopen the lid to my laptop. I've searched Google a bit to no avail, but I'll kepe looking.

Last edited by AmagicalFishy (2017-11-25 03:07:29)

loqs

Member

Registered: 2014-03-06

Posts: 17,368

Re: Not sure how to begin troubleshooting this: Programs not opening

https://wiki.archlinux.org/index.php/Ne … e_hostname

The hostname of localhost is not considered valid and can be replaced by a hostname supplied by dhcp.

AmagicalFishy

Member

Registered: 2016-12-10

Posts: 69

Re: Not sure how to begin troubleshooting this: Programs not opening

So, I changed my hostname and everything works as intended.

What is it about opening programs that my hostname is required?

loqs

Member

Registered: 2014-03-06

Posts: 17,368

Re: Not sure how to begin troubleshooting this: Programs not opening

The X server uses host based authentication.  The change in hostname caused the X server to reject new connections as the hostname was not authorized.