Jaakko Seppälä's questions

Why do the installation of Sagemath fails on Ubuntu? I tried

jaakko@jaakko-Aspire-E1-572:~$ sudo apt install sagemath-common
[sudo] password for jaakko: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  sagemath-common
0 upgraded, 1 newly installed, 0 to remove and 8 not upgraded.
Need to get 16,2 MB of archives.
After this operation, 205 MB of additional disk space will be used.
Get:1 http://fi.archive.ubuntu.com/ubuntu focal/universe amd64 sagemath-common all 9.0-1ubuntu4 [16,2 MB]
Fetched 16,2 MB in 4s (3 888 kB/s)            
Selecting previously unselected package sagemath-common.
(Reading database ... 216481 files and directories currently installed.)
Preparing to unpack .../sagemath-common_9.0-1ubuntu4_all.deb ...
Unpacking sagemath-common (9.0-1ubuntu4) ...
Setting up sagemath-common (9.0-1ubuntu4) ...
/usr/lib/python3/dist-packages/sage/combinat/root_system/branching_rules.py:1753
: SyntaxWarning: "is not" with a literal. Did you mean "!="?
  if len(stypes) is not 2:
/usr/lib/python3/dist-packages/sage/graphs/graph_latex.py:1159: SyntaxWarning: '
str' object is not callable; perhaps you missed a comma?
  raise TypeError('%s option must be a dictionary, not %s' (name, value))
/usr/lib/python3/dist-packages/sage/graphs/graph_latex.py:1168: SyntaxWarning: '
str' object is not callable; perhaps you missed a comma?
  raise TypeError('%s option must be a dictionary, not %s' (name, value))
/usr/lib/python3/dist-packages/sage/graphs/graph_latex.py:1175: SyntaxWarning: '
str' object is not callable; perhaps you missed a comma?
  raise TypeError('%s option must be a dictionary, not %s' (name, value))
/usr/lib/python3/dist-packages/sage/graphs/graph_latex.py:1182: SyntaxWarning: '
str' object is not callable; perhaps you missed a comma?
  raise TypeError('%s option must be a dictionary, not %s' (name, value))
/usr/lib/python3/dist-packages/sage/graphs/graph_latex.py:1189: SyntaxWarning: '
str' object is not callable; perhaps you missed a comma?
  raise TypeError('%s option must be a dictionary, not %s' (name, value))
/usr/lib/python3/dist-packages/sage/graphs/graph_latex.py:1196: SyntaxWarning: '
str' object is not callable; perhaps you missed a comma?
  raise TypeError('%s option must be a dictionary, not %s' (name, value))
/usr/lib/python3/dist-packages/sage/graphs/graph_latex.py:1203: SyntaxWarning: '
str' object is not callable; perhaps you missed a comma?
  raise TypeError('%s option must be a dictionary, not %s' (name, value))
Processing triggers for man-db (2.9.1-1) ...
jaakko@jaakko-Aspire-E1-572:~$ sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.0, Release Date: 2020-01-01                     │
│ Using Python 3.8.5. Type "help()" for help.                        │
└────────────────────────────────────────────────────────────────────┘
Traceback (most recent call last):
  File "/usr/share/sagemath/bin/sage-ipython", line 12, in <module>
    from sage.repl.interpreter import SageTerminalApp
  File "/usr/lib/python3/dist-packages/sage/repl/interpreter.py", line 105, in <module>
    from sage.repl.preparse import preparse, containing_block
  File "/usr/lib/python3/dist-packages/sage/repl/preparse.py", line 227, in <module>
    from sage.repl.load import load_wrap
  File "/usr/lib/python3/dist-packages/sage/repl/load.py", line 19, in <module>
    from sage.cpython.string import str_to_bytes, bytes_to_str, FS_ENCODING
ModuleNotFoundError: No module named 'sage.cpython.string'
jaakko@jaakko-Aspire-E1-572:~$ 

Is it possible to crate a link to Gnome desktop that allows me to start a particular webpage that requires logging to the site and clicking some JavaScript buttons? I have a project in my work that requires logging to a WWW-site relatively regularly and often I have to choose one particular project.

I have Xubuntu 17.10. I tried to install Eclipse via apt-get. When I tried to run it, I got an error

An error has occurred. See the log file
/home/jaakko/.eclipse/org.eclipse.platform_3.8_155965261/configuration/1510564798671.log.

The log file is the following:

!SESSION 2017-11-13 11:19:57.077 -----------------------------------------------
eclipse.buildId=debbuild
java.version=9.0.1
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Command-line arguments:  -os linux -ws gtk -arch x86_64

!ENTRY org.eclipse.equinox.simpleconfigurator 4 0 2017-11-13 11:20:00.209
!MESSAGE FrameworkEvent ERROR
!STACK 0
org.osgi.framework.BundleException: The bundle "org.eclipse.equinox.simpleconfigurator_1.0.301.dist [1]" could not be resolved. Reason: Missing Constraint: Bundle-RequiredExecutionEnvironment: CDC-1.1/Foundation-1.1,J2SE-1.4
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolverError(AbstractBundle.java:1332)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolutionFailureException(AbstractBundle.java:1316)
    at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:323)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
    at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
    at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
    at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)

!ENTRY org.eclipse.osgi 4 0 2017-11-13 11:20:00.222
!MESSAGE Bundle initial@reference:file:plugins/org.eclipse.equinox.simpleconfigurator_1.0.301.dist.jar was not resolved.

!ENTRY org.eclipse.osgi 2 0 2017-11-13 11:20:00.256
!MESSAGE One or more bundles are not resolved because the following root constraints are not resolved:
!SUBENTRY 1 org.eclipse.osgi 2 0 2017-11-13 11:20:00.256
!MESSAGE Bundle initial@reference:file:plugins/org.eclipse.equinox.simpleconfigurator_1.0.301.dist.jar was not resolved.
!SUBENTRY 2 org.eclipse.equinox.simpleconfigurator 2 0 2017-11-13 11:20:00.256
!MESSAGE Missing required capability Require-Capability: osgi.ee; filter="(|(&(osgi.ee=CDC/Foundation)(version=1.1))(&(osgi.ee=JavaSE)(version=1.4)))".

!ENTRY org.eclipse.osgi 2 0 2017-11-13 11:20:00.268
!MESSAGE The following is a complete list of bundles which are not resolved, see the prior log entry for the root cause if it exists:
!SUBENTRY 1 org.eclipse.osgi 2 0 2017-11-13 11:20:00.268
!MESSAGE Bundle org.eclipse.equinox.simpleconfigurator_1.0.301.dist [1] was not resolved.
!SUBENTRY 2 org.eclipse.equinox.simpleconfigurator 2 0 2017-11-13 11:20:00.268
!MESSAGE Missing required capability Require-Capability: osgi.ee; filter="(|(&(osgi.ee=CDC/Foundation)(version=1.1))(&(osgi.ee=JavaSE)(version=1.4)))".

!ENTRY org.eclipse.osgi 4 0 2017-11-13 11:20:00.281
!MESSAGE Application error
!STACK 1
java.lang.IllegalStateException: Unable to acquire application service. Ensure that the org.eclipse.core.runtime bundle is resolved and started (see config.ini).
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:74)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1414)

I found this problem occurs if I use Java 9 but not if I use Java 8.

How can I install Eclipse to my computer to run Java 9?

I would like to type an equation, put a label D on it and the make a reference to it. I tried:

\begin{equation*}
\label{D}
w''+e^{-z}\cdot w'+\alpha \cdot w=0
\end{equation*}
with $\alpha\in\mathbb{C}$ and showed that precisely when a solution to~\ref{D}

But when the Texmaker compiled the document, the end of the line is

and showed that precisely when a solution to

Then I changed the code to

\begin{equation*}
\label{D}
\tag{D}
w''+e^{-z}\cdot w'+\alpha \cdot w=0
\end{equation*}
with $\alpha\in\mathbb{C}$ and showed that precisely when a solution to~\ref{D}

but still the D was missing. After that, I tried removed the line \tag{D} to recompile the first version of the code. Now I was able to see the correct output:

and showed that precisely when a solution to D.

So is that a bug in LaTeX or TexMaker as I was unable to see the letter D in the first time?

I have Ubuntu 17.04 and

This is pdfTeX, Version 3.14159265-2.6-1.40.17 (TeX Live 2016/Debian) (preloaded format=pdflatex 2017.8.16) 15 SEP 2017 09:29

and

Texmaker 4.5
(compiled with Qt 5.6.1 and Poppler 0.44.0)
Copyright (c) 2003-2015 by Pascal Brachet

I use Gnu Nano on Yakuake to write a LaTeX-document. Then yesterday I found that I can't see the character _ on the Nano. I know that the characters are there as LaTeX renders the tex-file correctly. Is that a bug in Yakuake or Nano or is there some settings that is wrong in my system?

Here is a demo. The code that looks like \lim {r\to\infty} is really \lim_{r\to\infty}

I had a working wifi connection but now I don't have it on my Xubuntu but wifi works in another Windows 10 computer. How can I set wifi to work? When I clicked indicator plugin on Xfce, I can see that the option Enable Wi-Fi is enabled but Wi-Fi Networks device not managed is disabled.

I tried to install WhatsApp Web on Ubuntu. I have a Nexus 5 where my WhatsApp works fine. I tried to install the software to my Ubuntu but it asks QR code. I took a picture of it by my phone. But I don't know how to tell the WhatsApp web that I already took the picture. Can anyone help?

I would like to measure how much a laptop with Windows XP can run on batteries. I have another computer with Xubuntu that I can use to measure if Windows XP computer is on. But how can I connect these two computers and how can I measure if Xubuntu can read data from Windows XP computer? Or should XP send some data to Xubuntu?

I used Nexus 5 to share Internet connection to my laptop via USB. It worked well but suddenly on one day it stopped shared the connection, and it has never shared the connection since then. How can I debug this problem? My nexus 5 has Android version 6.0 and Ubuntu has the following version:

jaakko@jaakko-Aspire-E1-572:~/programming$ lsb_release -a
LSB Version:    core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 15.04
Release:        15.04
Codename:       vivid
jaakko@jaakko-Aspire-E1-572:~/programming$ uname -a
Linux jaakko-Aspire-E1-572 4.0.0-040000-generic #201504121935 SMP Sun Apr 12 23:36:33 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

I tried to use my computer to distributed computing projects World Community Grid/Outsmart Ebola Together and World Community Grid/FightAIDS@Home. It worked nicely but yesterday the Boinc started to say just:

Not connected to a client.

Does anyone has some ideas why it says so? Now it looks like I have no tasks to do and I'm not part in any research project. And it seems to be impossible to attach any projects as the menu Add project or account manager... just closes the drop-down menu. Is this a bug or is there some setup I need to check?

The version is 7.2.42 (x64) and wxWidgets version 2.8.12.

I read that my pdf-readers Xpdf and Okular can't show a document from http://math.aalto.fi/opetus/sovtoda/oppikirja/Johdanto.pdf correctly as my Ubuntu or xpdf and evince has not installed the font MT Extra (https://bugzilla.gnome.org/show_bug.cgi?id=747231). How can I install it?

I got the following error message from Software Updater:

The upgrade needs a total of 74,6 M free space on disk '/boot'. Please free at least an additional 68,3 M of disk space on '/boot'. Empty your trash and remove temporary packages of former installations using 'sudo apt-get clean'.

How can I get more disc space? I have

df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/mapper/xubuntu--vg-root  454G   13G  418G   3% /
none                          4,0K     0  4,0K   0% /sys/fs/cgroup
udev                          1,9G  4,0K  1,9G   1% /dev
tmpfs                         384M  1,3M  383M   1% /run
none                          5,0M     0  5,0M   0% /run/lock
none                          1,9G   24M  1,9G   2% /run/shm
none                          100M   36K  100M   1% /run/user
/dev/sda2                     237M  219M  6,1M  98% /boot
/dev/sda1                     511M  3,4M  508M   1% /boot/efi

My Xfce goes black after some time when I'm not using computer. I already checked from setting/screensaver that mode is set to be disable screen saver, but the screen still goes black. How can I make sure that I can watch World Cup matches without screen going to black? Do I need some script that presses for example shift button every couple of minutes?

I found that Okular won't find text that has letter ä. At least I tested with the following document:

\documentclass[10pt]{book}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[finnish]{babel}
\usepackage{blindtext}
\usepackage{siunitx}
\sisetup{output-decimal-marker = {,}}

\usepackage[a5paper]{geometry}
%\usepackage[a5paper, top=2in, bottom=1.5in, left=1in, right=1in]{geometry}
\usepackage{scrextend}
\changefontsizes{10.0pt}  % Change base font size

\usepackage{lettrine}
\usepackage{fancyhdr}

\usepackage{wasysym}
\pagestyle{fancy}
\fancyhf{} % clear all fields
\fancyhead[RO,LE]{\thepage}
\linespread{1.3}

\begin{document}
ÄÖäö
\end{document}

compiled with pdflatex demo.tex. Is there a PDF-reader for Ubuntu that can find such letters correctly, or is there some bash script that allows me to find such strings from PDF's and scrolls Okular to the location of the string in a PDF file?

I would like to turn my touchpad off when my desktop starts. How can I do that? I already found that the following script outputs 14:

xinput list | grep -Eo 'TouchPad\s*id\=[0-9]{1,2}' | grep -Eo '[0-9]{1,2}'

But how can I configure my computer such that the script

xinput set-prop 14 "Device Enabled" 0

would be run when starting XFCE?

I tried to install sagemath via command line but encountered a problem. Am I doing something wrong? I have Ubuntu 13.10.

jaakko@jaakko-VPCEB1S1E:~$ sudo apt-add-repository -y ppa:aims/sagemath
gpg: keyring `/tmp/tmp7y1mxl/secring.gpg' created
gpg: keyring `/tmp/tmp7y1mxl/pubring.gpg' created
gpg: requesting key BE796FF2 from hkp server keyserver.ubuntu.com
gpg: /tmp/tmp7y1mxl/trustdb.gpg: trustdb created
gpg: key BE796FF2: public key "Launchpad PPA for AIMS" imported
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)
OK
jaakko@jaakko-VPCEB1S1E:~$ sudo apt-get update
Ign http://fi.archive.ubuntu.com saucy InRelease
Ign http://fi.archive.ubuntu.com saucy-updates InRelease                       
Ign http://fi.archive.ubuntu.com saucy-backports InRelease                     
Ign http://ppa.launchpad.net saucy InRelease                                   
Hit http://fi.archive.ubuntu.com saucy Release.gpg                             
Hit http://fi.archive.ubuntu.com saucy-updates Release.gpg                     
Ign http://extras.ubuntu.com saucy InRelease                                   
Hit http://ppa.launchpad.net saucy Release.gpg                                 
Hit http://fi.archive.ubuntu.com saucy-backports Release.gpg                   
Hit http://fi.archive.ubuntu.com saucy Release                                 
Hit http://ppa.launchpad.net saucy Release                                     
Hit http://extras.ubuntu.com saucy Release.gpg                                 
Hit http://fi.archive.ubuntu.com saucy-updates Release                         
Hit http://fi.archive.ubuntu.com saucy-backports Release                       
Hit http://extras.ubuntu.com saucy Release                                     
Ign http://security.ubuntu.com saucy-security InRelease                        
Hit http://ppa.launchpad.net saucy/main i386 Packages                
Hit http://fi.archive.ubuntu.com saucy/main Sources                  
Hit http://fi.archive.ubuntu.com saucy/restricted Sources                      
Hit http://extras.ubuntu.com saucy/main Sources                                
Hit http://fi.archive.ubuntu.com saucy/universe Sources                        
Hit http://fi.archive.ubuntu.com saucy/multiverse Sources                      
Hit http://extras.ubuntu.com saucy/main i386 Packages                          
Hit http://fi.archive.ubuntu.com saucy/main i386 Packages                      
Hit http://security.ubuntu.com saucy-security Release.gpg                      
Hit http://fi.archive.ubuntu.com saucy/restricted i386 Packages                
Hit http://fi.archive.ubuntu.com saucy/universe i386 Packages        
Hit http://fi.archive.ubuntu.com saucy/multiverse i386 Packages      
Hit http://fi.archive.ubuntu.com saucy/main Translation-en           
Hit http://security.ubuntu.com saucy-security Release                
Hit http://fi.archive.ubuntu.com saucy/multiverse Translation-en               
Hit http://fi.archive.ubuntu.com saucy/restricted Translation-en               
Hit http://security.ubuntu.com saucy-security/main Sources                     
Hit http://fi.archive.ubuntu.com saucy/universe Translation-en       
Hit http://fi.archive.ubuntu.com saucy-updates/main Sources          
Ign http://ppa.launchpad.net saucy/main Translation-en_US            
Hit http://fi.archive.ubuntu.com saucy-updates/restricted Sources              
Hit http://fi.archive.ubuntu.com saucy-updates/universe Sources                
Ign http://ppa.launchpad.net saucy/main Translation-en               
Hit http://fi.archive.ubuntu.com saucy-updates/multiverse Sources              
Hit http://security.ubuntu.com saucy-security/restricted Sources               
Hit http://fi.archive.ubuntu.com saucy-updates/main i386 Packages
Hit http://fi.archive.ubuntu.com saucy-updates/restricted i386 Packages
Ign http://extras.ubuntu.com saucy/main Translation-en_US
Hit http://fi.archive.ubuntu.com saucy-updates/universe i386 Packages          
Hit http://fi.archive.ubuntu.com saucy-updates/multiverse i386 Packages        
Ign http://extras.ubuntu.com saucy/main Translation-en
Hit http://security.ubuntu.com saucy-security/universe Sources                 
Hit http://fi.archive.ubuntu.com saucy-updates/main Translation-en             
Hit http://fi.archive.ubuntu.com saucy-updates/multiverse Translation-en
Hit http://fi.archive.ubuntu.com saucy-updates/restricted Translation-en
Hit http://security.ubuntu.com saucy-security/multiverse Sources               
Hit http://fi.archive.ubuntu.com saucy-updates/universe Translation-en         
Hit http://fi.archive.ubuntu.com saucy-backports/main Sources
Hit http://fi.archive.ubuntu.com saucy-backports/restricted Sources
Hit http://fi.archive.ubuntu.com saucy-backports/universe Sources
Hit http://security.ubuntu.com saucy-security/main i386 Packages
Hit http://fi.archive.ubuntu.com saucy-backports/multiverse Sources
Hit http://fi.archive.ubuntu.com saucy-backports/main i386 Packages
Hit http://fi.archive.ubuntu.com saucy-backports/restricted i386 Packages
Hit http://fi.archive.ubuntu.com saucy-backports/universe i386 Packages
Hit http://fi.archive.ubuntu.com saucy-backports/multiverse i386 Packages      
Hit http://security.ubuntu.com saucy-security/restricted i386 Packages         
Hit http://fi.archive.ubuntu.com saucy-backports/main Translation-en           
Hit http://fi.archive.ubuntu.com saucy-backports/multiverse Translation-en
Hit http://security.ubuntu.com saucy-security/universe i386 Packages
Hit http://fi.archive.ubuntu.com saucy-backports/restricted Translation-en
Hit http://fi.archive.ubuntu.com saucy-backports/universe Translation-en       
Hit http://security.ubuntu.com saucy-security/multiverse i386 Packages         
Hit http://security.ubuntu.com saucy-security/main Translation-en              
Hit http://security.ubuntu.com saucy-security/multiverse Translation-en
Ign http://fi.archive.ubuntu.com saucy/main Translation-en_US
Hit http://security.ubuntu.com saucy-security/restricted Translation-en
Ign http://fi.archive.ubuntu.com saucy/multiverse Translation-en_US
Ign http://fi.archive.ubuntu.com saucy/restricted Translation-en_US
Ign http://fi.archive.ubuntu.com saucy/universe Translation-en_US
Ign http://fi.archive.ubuntu.com saucy-updates/main Translation-en_US
Ign http://fi.archive.ubuntu.com saucy-updates/multiverse Translation-en_US
Ign http://fi.archive.ubuntu.com saucy-updates/restricted Translation-en_US
Ign http://fi.archive.ubuntu.com saucy-updates/universe Translation-en_US
Ign http://fi.archive.ubuntu.com saucy-backports/main Translation-en_US
Ign http://fi.archive.ubuntu.com saucy-backports/multiverse Translation-en_US
Ign http://fi.archive.ubuntu.com saucy-backports/restricted Translation-en_US
Hit http://security.ubuntu.com saucy-security/universe Translation-en
Ign http://fi.archive.ubuntu.com saucy-backports/universe Translation-en_US
Ign http://security.ubuntu.com saucy-security/main Translation-en_US
Ign http://security.ubuntu.com saucy-security/multiverse Translation-en_US
Ign http://security.ubuntu.com saucy-security/restricted Translation-en_US
Ign http://security.ubuntu.com saucy-security/universe Translation-en_US
Reading package lists... Done
jaakko@jaakko-VPCEB1S1E:~$ sudo apt-get install sagemath-upstream-binary
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package sagemath-upstream-binary is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'sagemath-upstream-binary' has no installation candidate
jaakko@jaakko-VPCEB1S1E:~$ 

Is it a bug in viewers or a property that if I click a link in a pdf, nothing happens in Okular and MuPDF outputs "Couldn't get a file descriptor referring to the console"? xPDF outputs

Warning: Cannot convert string "-*-helvetica-medium-r-normal--12-*-*-*-*-*-iso8859-1" to type FontStruct
Warning: Cannot convert string "-*-courier-medium-r-normal--12-*-*-*-*-*-iso8859-1" to type FontStruct
Warning: Cannot convert string "-*-times-bold-i-normal--20-*-*-*-*-*-iso8859-1" to type FontStruct
Warning: Cannot convert string "-*-times-medium-r-normal--16-*-*-*-*-*-iso8859-1" to type FontStruct
Syntax Error: Couldn't create a font for 'RXAUES+CMR10'
Syntax Error: Couldn't create a font for 'EJASTL+CMR7'
Segmentation fault (core dumped)

I thought that they will open the WWW-browser. Here is my test file: (I know it is silly to use the package Finnish babel in English document but I just made a quick test file for to demostrate.)

\documentclass[a4paper]{amsart}
\usepackage[utf8]{inputenc}
\usepackage[finnish]{babel}
\usepackage{url}
\usepackage[]{hyperref}
\begin{document}
See also \href{http://www.google.com/}{Google}.
\end{document}

compiled by pdflatex test.tex. Compilation gave

This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012/Debian)
 restricted \write18 enabled.
entering extended mode
(./test.tex
LaTeX2e <2011/06/27>
Babel <v3.8m> and hyphenation patterns for english, dumylang, nohyphenation, et
hiopic, farsi, arabic, pinyin, croatian, bulgarian, ukrainian, russian, slovak,
 czech, danish, dutch, usenglishmax, ukenglish, finnish, french, basque, ngerma
n, german, swissgerman, ngerman-x-2012-05-30, german-x-2012-05-30, monogreek, g
reek, ibycus, ancientgreek, hungarian, bengali, tamil, hindi, telugu, gujarati,
 sanskrit, malayalam, kannada, assamese, marathi, oriya, panjabi, italian, lati
n, latvian, lithuanian, mongolian, mongolianlmc, nynorsk, bokmal, indonesian, e
speranto, coptic, welsh, irish, interlingua, serbian, serbianc, slovenian, friu
lan, romansh, estonian, romanian, armenian, uppersorbian, turkish, afrikaans, i
celandic, kurmanji, polish, portuguese, galician, catalan, spanish, swedish, th
ai, loaded.
(/usr/share/texlive/texmf-dist/tex/latex/amscls/amsart.cls
Document Class: amsart 2009/07/02 v2.20.1
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amstext.sty
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsgen.sty))
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsbsy.sty)
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsopn.sty))
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsa.fd)
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/amsfonts.sty))
(/usr/share/texlive/texmf-dist/tex/latex/base/inputenc.sty
(/usr/share/texlive/texmf-dist/tex/latex/base/utf8.def
(/usr/share/texlive/texmf-dist/tex/latex/base/t1enc.dfu)
(/usr/share/texlive/texmf-dist/tex/latex/base/ot1enc.dfu)
(/usr/share/texlive/texmf-dist/tex/latex/base/omsenc.dfu)))
(/var/lib/texmf/tex/generic/babel/babel.sty
(/usr/share/texlive/texmf-dist/tex/generic/babel/finnish.ldf
(/usr/share/texlive/texmf-dist/tex/generic/babel/babel.def)))
(/usr/share/texlive/texmf-dist/tex/latex/url/url.sty)
(/usr/share/texlive/texmf-dist/tex/latex/hyperref/hyperref.sty
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/hobsub-hyperref.sty
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/hobsub-generic.sty))
(/usr/share/texlive/texmf-dist/tex/latex/graphics/keyval.sty)
(/usr/share/texlive/texmf-dist/tex/generic/ifxetex/ifxetex.sty)
(/usr/share/texlive/texmf-dist/tex/latex/oberdiek/kvoptions.sty)
(/usr/share/texlive/texmf-dist/tex/latex/hyperref/pd1enc.def)
(/usr/share/texlive/texmf-dist/tex/latex/latexconfig/hyperref.cfg))

Package hyperref Message: Driver (autodetected): hpdftex.

(/usr/share/texlive/texmf-dist/tex/latex/hyperref/hpdftex.def
(/usr/share/texlive/texmf-dist/tex/latex/oberdiek/rerunfilecheck.sty))
(./test.aux) (/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsa.fd)
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsb.fd)
(/usr/share/texlive/texmf-dist/tex/latex/hyperref/nameref.sty
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/gettitlestring.sty))
(./test.out) (./test.out) [1{/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map}
] (./test.aux) )</usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/c
mr10.pfb></usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmr7.pfb
>
Output written on test.pdf (1 page, 19384 bytes).
Transcript written on test.log.

Is there a bug in XFCE desktop? Namely, I can see some weird "XD"-letters when I try to open LaTeXDraw. Letters seem to be much bigger than the normal logo. It does not affect my mouse. I'm using Xfce 4.10, Ubuntu 12.10 and LaTeXDraw version 2.0.8, build 20100314.

Here is a screenshot:

When choose some PDF document to be opened by Evince from a WWW-site, it shows the document with font size 300%. How can I change it to show the document by font size 100 %? The same issue occurs both in Firefox and in Chrome. I'm using Ubuntu 12.10, Evince 3.6.0, Firefox 16.0.1 and Chrome 22.0.1229.94.