Looks like enabling VNC was the culprit, cf.

http://www.mythtv.org/pipermail/mythtv-users/2014-April/362863.html

Regards

Janusz


Quote/Cytat - Ubuntu Foundations Team Bug Bot  
<email address hidden> (Sat 19 Apr 2014 01:08:45 AM CEST):

> Exception during installation:
> Apr 18 21:01:56 mythbuntu /plugininstall.py: Traceback (most recent  
> call last):
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 1770, in <module>
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     install.run()
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 78, in wrapper
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     func(self)
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 204, in run
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     self.configure_plugins()
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 570, in configure_plugins
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     self.run_plugin(plugin)
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 544, in run_plugin
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     ret =  
> inst.install(self.target, PluginProgress(self.db))
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/lib/ubiquity/plugins/myth-install-type.py", line 198, in install
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     self.setup_roles()
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/lib/ubiquity/plugins/myth-install-type.py", line 178, in  
> setup_roles
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     vnc.create_password(passwd)
> Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/lib/python3/dist-packages/mythbuntu_common/vnc.py", line 58,  
> in create_password
> Apr 18 21:01:56 mythbuntu /plugininstall.py:     raise  
> ValueError('Password should be passed as bytes')
> Apr 18 21:01:56 mythbuntu /plugininstall.py: ValueError: Password  
> should be passed as bytes
> Apr 18 21:01:56 mythbuntu /plugininstall.py:
>
>
> ** Tags added: installer-crash
>
> ** Changed in: ubiquity (Ubuntu)
>    Importance: Undecided => High
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1309752
>
> Title:
>   Mythbuntu installer crashed
>
> Status in “ubiquity” package in Ubuntu:
>   New
>
> Bug description:
>   I don't know how to access any editor  at this stage of  
> installation, so I just used copy and paste in the web browser.
>   This the final part  of the syslog:
>
>   Apr 18 21:01:56 mythbuntu /plugininstall.py: Exception during installation:
>   Apr 18 21:01:56 mythbuntu /plugininstall.py: Traceback (most  
> recent call last):
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 1770, in <module>
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:     install.run()
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 78, in wrapper
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:     func(self)
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 204, in run
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:     self.configure_plugins()
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 570, in configure_plugins
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:     self.run_plugin(plugin)
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/share/ubiquity/plugininstall.py", line 544, in run_plugin
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:     ret =  
> inst.install(self.target, PluginProgress(self.db))
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/lib/ubiquity/plugins/myth-install-type.py", line 198, in install
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:     self.setup_roles()
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/lib/ubiquity/plugins/myth-install-type.py", line 178, in  
> setup_roles
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:      
> vnc.create_password(passwd)
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:   File  
> "/usr/lib/python3/dist-packages/mythbuntu_common/vnc.py", line 58,  
> in create_password
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:     raise  
> ValueError('Password should be passed as bytes')
>   Apr 18 21:01:56 mythbuntu /plugininstall.py: ValueError: Password  
> should be passed as bytes
>   Apr 18 21:01:56 mythbuntu /plugininstall.py:
>   Apr 18 21:02:16 mythbuntu ubiquity: Gtk-Message: Failed to load  
> module "overlay-scrollbar"
>   Apr 18 21:02:16 mythbuntu ubiquity: Gtk-Message: Failed to load  
> module "overlay-scrollbar"
>   Apr 18 21:02:45 mythbuntu ubiquity: ATTENTION: default value of  
> option force_s3tc_enable overridden by envir
>
>   The final part of partman:
>
>
>   parted_server: OUT:  
> 1	32256-2000363420159	2000363387904	primary	ext4	/dev/sde1
>
>
>   parted_server: Partitions printed
>   parted_server: OUT:
>
>
>   parted_server: Closing infifo and outfifo
>   parted_server: main_loop: iteration 1054
>   parted_server: Opening infifo
>   /lib/partman/finish.d/80parted:  
> *******************************************************
>   /lib/partman/finish.d/80parted: IN: QUIT
>   parted_server: Read command: QUIT
>   parted_server: Quitting
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 14.04
>   Package: ubiquity 2.18.7
>   ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
>   Uname: Linux 3.13.0-24-generic x86_64
>   ApportVersion: 2.14.1-0ubuntu3
>   Architecture: amd64
>   CasperVersion: 1.340
>   Date: Fri Apr 18 23:02:16 2014
>   InstallCmdLine: initrd=/casper/initrd.lz  
> file=/cdrom/preseed/mythbuntu.seed boot=casper only-ubiquity  quiet  
> splash -- BOOT_IMAGE=/casper/vmlinuz.efi
>   LiveMediaBuild: Mythbuntu 14.04 LTS "Trusty Tahr" - Release amd64  
> (20140417)
>   ProcEnviron:
>    TERM=linux
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=en_US.UTF-8
>   SourcePackage: ubiquity
>   UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1309752/+subscriptions
>



-- 
Prof. dr hab. Janusz S. Bień -  Uniwersytet Warszawski (Katedra  
Lingwistyki Formalnej)
Prof. Janusz S. Bień - University of Warsaw (Formal Linguistics Department)
<email address hidden>, <email address hidden>, http://fleksem.klf.uw.edu.pl/~jsbien/