Adobe Flash fails Firefox: LoadPlugin: failed initialize flashplugin-installer/ : wrong ELF class: ELFCLASS64 ; gre

giovanni_re john_re at
Wed Mar 23 22:30:01 UTC 2011

Two error messages:

1) Upon starting Firefox from the command line:
"LoadPlugin: failed to initialize shared library
[/var/lib/flashplugin-installer/ wrong ELF
class: ELFCLASS64]"

2) Adobe Flash fails in Firefox, on  
"Hello, you either have JavaScript turned off or an old version of
Adobe's Flash Player. Get the latest Flash player."
On youtube, & other websites.

Firefox is complaining about flash - saying it thinks Javascript is off,
or I have an old Flash Player version that needs to be updated.  Both of
those are false, I suspect.

I'm running KUbuntu 10.4 fully apt-updated, on AMD 64.
Firefox is the direct from Mozilla download, not the Ubuntu version,
because the Moz version has the debug capability built in, to record
what happened if FF crashes.

Adobe flash seems to be comming direct from Adobe, through the Ubuntu
package management system, a flash installer that grabs the latest Adobe
Flash sw direct from Adobe, during the "apt-get upgrade" operation.  The
latest Adobe flash update/download happened today.  As typical, that
made no difference to this problem - this error has been occuring for
months, through several Flash upgrades.

I start Firefox from the command line (not the GUI start menu), so that
I'll have the output messages in the console.

I start FF with the "Profile Manager" option on the command line, &
select from several profiles I have set up.  I thus usually have several
instances of FF running at once, under different profiles.  That is so
that if Firefox crashes, it doesn't kill _all_ the FF web browser
windows I have open, only the ones running in that profile's instance.

Upon startup, the 3rd message to the console is:
"LoadPlugin: failed to initialize shared library
[/var/lib/flashplugin-installer/ wrong ELF
class: ELFCLASS64]"

In, for example,, where the flash video player should
apperar, is only the error message: 
"Hello, you either have JavaScript turned off or an old version of
Adobe's Flash Player. Get the latest Flash player."

Any idea what the problem fix is??

Thanks. :)

===================     Some data:

/var/lib/flashplugin-installer$ ll
total 116
-rwxr-xr-x 1 root root 117960 2011-03-23 13:13

Firefox 3.6.10

FF Add-ons extensions running:
Adblock Plus 1.2
BetterPrivacy 1.47.4
DownloadHelper 4.7.3
Flashblock 1.5.13
Ghostery 2.1.1

uname -a
Linux a 2.6.32-30-generic #59-Ubuntu SMP Tue Mar 1 21:30:46 UTC 2011
x86_64 GNU/Linux

Flashblock 1.5.13 plugin, whitelisted
Noscript, whitelisted

locate flashplugin

root at a:~/apt# time  apt-get upgrade
The following packages will be upgraded:
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/20.3kB of archives.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
Preconfiguring packages ...
(Reading database ... 175498 files and directories currently installed.)
Preparing to replace flashplugin-installer
(using .../flashplugin-installer_10.2.153.1ubuntu0.10.04.1_amd64.deb)
Unpacking replacement flashplugin-installer ...
Setting up flashplugin-installer ( ...
--2011-03-23 13:11:41--
Connecting to||:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 4967805 (4.7M) [application/x-gzip]
Saving to: `./adobe-flashplugin_10.2.153.1.orig.tar.gz'

     0K .......... .......... .......... .......... ..........  1% 40.9K
    50K .......... .......... .......... .......... ..........  2% 85.3K
  4750K .......... .......... .......... .......... .......... 98% 51.0K
  4800K .......... .......... .......... .......... .......... 99% 48.7K
  4850K .                                                     100%

2011-03-23 13:13:41 (41.0 KB/s) -
`./adobe-flashplugin_10.2.153.1.orig.tar.gz' saved [4967805/4967805]

Download done.
Flash Plugin installed.

apt-cache show flashplugin-installer

Package: flashplugin-installer
Priority: optional
Section: multiverse/web
Installed-Size: 184
Maintainer: Ubuntu Developers <ubuntu-devel-discuss at>
Original-Maintainer: Bart Martens <bartm at>
Architecture: amd64
Source: flashplugin-nonfree
Replaces: flashplugin (<< 6), flashplugin-nonfree
Provides: flashplugin-nonfree
Depends: nspluginwrapper (>=, ia32-libs (>=
2.2ubuntu18), debconf | debconf-2.0, wget, fontconfig
Recommends: libasound2-plugins (>= 1.0.16)
Suggests: firefox, xulrunner-1.9, firefox-3.0, konqueror-nsplugins,
x-ttcidfont-conf, msttcorefonts, ttf-bitstream-vera | ttf-dejavu,
ttf-xfree86-nonfree, xfs (>= 1:1.0.1-5)
Conflicts: flashplayer-mozilla, flashplugin (<< 6), flashplugin-nonfree
(<<, libflashsupport, xfs (<< 1:1.0.1-5)
Size: 20302
MD5sum: 9b786d4a6f2b24f48e997a3f212dceb1
SHA1: be6dd06ac37755eff9b2ca59f9299f66f8336811
SHA256: f536b8cb17c7f0b49f98d9af26ea62eebedad35ab64447b9d643ae6cc7ce7b66
Description: Adobe Flash Player plugin installer
 This package will download the Flash Player from the net.  It is a
 Netscape/Mozilla type plugin.  Any browser based on Netscape or Mozilla
 use the Flash plugin.  This package currently supports the following
 Mozilla, Mozilla-Firefox, Firefox, Iceweasel, and Iceape.  Also Galeon
 Epiphany can use the Flash plugin.  Konqueror can also use the Flash
 plugin if
 konqueror-nsplugins is installed.
 WARNING: Installing this Ubuntu package causes the Adobe flash plugin
 to be
 downloaded from  The distribution license of the Adobe
 plugin is available at  Installing this Ubuntu package
 that you have accepted the terms of that license.
Npp-Applications: ec8030f7-c20a-464f-9b0e-13a3a9e97384,
Npp-Description: Adobe Flash SWF Player (
Npp-Mimetype: application/x-shockwave-flash
Npp-Name: Adobe Flash Player (installer)
Origin: Ubuntu

LoadPlugin: failed to initialize shared library
[/var/lib/flashplugin-installer/ wrong ELF
class: ELFCLASS64]

/Firefox/firefox/firefox  -no-remote -ProfileManager

(firefox-bin:6427): Gtk-WARNING **:
/usr/lib/gtk-2.0/2.10.0/engines/ wrong ELF class:

(firefox-bin:6427): Gtk-WARNING **:
/usr/lib/gtk-2.0/2.10.0/engines/ wrong ELF class:
LoadPlugin: failed to initialize shared library
[/usr/lib/mozilla/plugins/ wrong ELF class: ELFCLASS64]
LoadPlugin: failed to initialize shared library
[/var/lib/flashplugin-installer/ wrong ELF
class: ELFCLASS64]

man flashplugin-installer
No manual entry for flashplugin-installer

dpkg -l | grep flash
ii  flashplugin-installer            
                Adobe Flash Player plugin installer

dpkg -l | grep mozilla

dpkg -l | grep fire
ii  firestarter                          1.0.3-7ubuntu5                 
                gtk program for managing and observing your 
ii  ufw                                  0.30pre1-0ubuntu2              
                program for managing a Netfilter firewall

Note: Mozilla Firefox installed from direct download from Mozilla, not
through the Ubuntu package system.

==  Join in the Global weekly meetings, via voice, about all Free SW HW & Culture

More information about the Ubuntu-devel-discuss mailing list