Debugging is a methodical process of finding and reducing the number of bugs, or defects, in a computer program

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Ubuntu 14.04 image preview never loads

After updating to 14.04 my image preview never shows up Is this common to update? Maybe it is related to my image viewer? Can I replace the default one or if its nautilus fault, what replacement ...
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1answer
37 views

Nginx failing to reload - how to track down why?

Hi I've had my Nginx server running great on Ubuntu server 12.04 for a while. I've been gradually bolting on various bits, and got as far as optimising load times on my wordpress page. After making ...
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25 views

“Code 126: Permission Denied” when using GDB Debugger

I have written a piece of C++ code and am trying to debug that using GDB Debugger. The code uses bunch of libraries, so I am using a make-file to compile and link all the required libraries, which I ...
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0answers
16 views

How can I debug a bug in gedit and GTK+?

I tried to debug a bug in gedit and GTK+ but encountered a problem. What command should I put the console that it gives me the sources of both two projects? I tried apt-get source gedit ./configure ...
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113 views

Help debugging string descriptor 0 read error on boot [closed]

I've installed Ubuntu 14.04 on my Acer aspire v5 laptop. I would like some help debugging a boot error. What information should I provide when asking questions? How do I isolate and diagnose a ...
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2answers
90 views

How to change Firefox debugger font size

It's too little to read. Bug report is https://bugzilla.mozilla.org/show_bug.cgi?id=143119 Notice: it's not about Firebug.
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0answers
14 views

What is the purpose of libstdc++-dbg?

The Synaptics package manager says that: This package contains the shared library of libstdc++ compiled with debugging symbols. But I can successfully print the contents of std members in the ...
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0answers
25 views

jdb not starting up

I am having a wierd problem. I manually installed the newest JDK from Oracle just about an hour ago. Now when I try running jdb through the command jdb DocumentListing1.java the output reads: The ...
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2answers
88 views

Confusing input error

During general use my laptop (Lenovo Thinkpad Edge 15 running Ubuntu 12.10) will suddenly mute its volume and stall for a few seconds, seemingly for no reason. At the same time if I'm in a terminal ...
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1answer
63 views

What is the role of a Bug reporter?

What is the role of a Bug reporter in reporting bugs and after reporting bugs? When and how can he get out of the bug-related problem? Most people get the benefits of the bug report after the bug is ...
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0answers
154 views

Can't use RStudio any more after trying to set up an ODBC connection to a postgreSQL database

I tried to Setup an odbc connection from R to my PostgreSQL database located on a server (package RODBC). When trying to connect the connection failed because I entered a wrong Username in the DSN ...
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1answer
71 views

Multiply 2 array index variables shell programming [closed]

How do i multiply 2 array index variables given the following foo=(1 2) bar=(0.1 0.2) foobar=$((foo[1]*price[1])) # this is wrong echo "$foobar" Current output : 0 Correct/Expected output : 0.4
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1answer
156 views

weird shell script error: invalid option return: usage: return [n]

This programme checks if a certain book title exist by matching user input of book title and book author. function removebook_option() { echo -n "Title : " read title_input2 echo -n ...
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7 views

What should I do after reset?

In addition to the popular question What should I do when Ubuntu freezes? . Lately my laptop had to be rebooted a couple of times. And I don't know why. What is the standard procedure to debug a ...
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0answers
32 views

K3b problem burning cd

I can't make audio cds with K3b although in the past I could... Anyone who has a clue about it is welcome... This is my debugging output: Devices HL-DT-ST DVD+-RW GT10N A109 (/dev/sr0, CD-R, CD-RW, ...
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1answer
71 views

Where are the missing build files for performing a kernel bisection?

I am attempting my first-ever kernel bisection to try and help debug a regression that occurred somewhere between 13.04 and 13.10. I am trying to follow the instructions listed at ...
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42 views

Itellij debug problem with maven

When I try to make a debug with intellij in a maven project in Ubuntu 13.04 i get this error, I try with another ports, remote debug, and check the host file, have the same result. Tested in a clean ...
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1answer
119 views

Debugging PHP in Ubuntu (Xdebug)

PHP Vim Debugger: Configuring Apache I am trying to install Vdebug to debug PHP in Vim. Unfortunately, when I press F5 this message appears after a few seconds Waiting for a connection (Ctrl-C to ...
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1answer
40 views

How to get the output (stdout/stderr) of a click application?

I have a click application installed on Ubuntu Touch, and I need to be able to read its standard output in order to debug it. Is the output captured somewhere, or is it possible to see it on the ...
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34 views

Alter Netbeans Debug options

I would start with specifications first. 1)Ubuntu 12.04 x86 2)NetBeans IDE 7.3.1 3)fuzzylite 3.1 My Query: The image in the above link the order of the debug option is incorrect as flag ...
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1answer
93 views

How to upgrade or downgrade the Kernel in Ubuntu (to any stable or testing release)

When I report a bug I may be asked to "try out the latest upstream Kernel", how do I do that? I see a lot of version specific answers to this question here on ask ubuntu, what are the general ...
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1answer
101 views

Get Rhythmbox debugging info

I'm having a weird problem with Rhythmbox that no one else seems to have. When I pause on any audio CD, I can't get Rhythmbox to play it again. I've tried various workarounds including trying to play ...
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0answers
32 views

How do I debug the .NET library from monodevelop?

Sometimes the .NET libraries do not do what I expect them to do. The fault is probably mine, most of the times, but it would be really nice, if I could delve into the actual implementation by "Step ...
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3answers
322 views

Debugging PHP apps with Kdevelop

I am using kdevelop 4.5.1 and I would like to debug php apps. I made a search and I found this article: http://nikosams.blogspot.com.es/2010/02 ... ugger.html which is from 2010 but I don't know how ...
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67 views

Online Accounts auth over and over again without success

I just added my Google account to the "Online Accounts" in Gnome. Before my last restart the account couldn't be added for unknown reason. I authorized Gnome access to my Google Account, the window ...
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2answers
187 views

Juju debug-hooks, how to run hook in debug terminal or get more information?

I'm having trouble deploying the Havana Openstack charms on precise for cinder, nova-cloud-controller, and quantum-gateway. I'm using MaaS running Virsh managed KVM machines. I'm getting errors with ...
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100 views

How to increase the debugging level of an already running `wpa_supplicant` instance?

How to increase the debugging level of an already running wpa_supplicant instance? Every attempt of using wpa_cli level result in a FAIL error message (even after pre-selecting the interface with -i ...
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1answer
62 views

system crash reason

One of our server recently get frequently crash....I am pasting some of the syslog here, anyone familar with system would give me a hint what caused this? Much appreciated. I am using Ubuntu 12.10. ...
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84 views

ptrace(attach) failing while attaching a thread from another thread (of same process)

1 #include <stdio.h> 2 #include <pthread.h> 3 #include <sys/ptrace.h> 4 #include <sys/types.h> 5 #include <sys/wait.h> 6 #include <unistd.h> 7 #include ...
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1answer
797 views

GDB crashes with: ImportError: No module named libstdcxx.v6.printers

I have a problem with GDB. Whenever I try to debug any C++ program, just after running it, GDB gives this error: (gdb) run Starting program: /home/errikos/Workspaces/tests/a.out Traceback (most ...
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146 views

is it possible for checking package of Ubuntu 13.10 in 13.04 or 12.04?

I most often do shift between home Ubuntu 13.04 and my Organization Ubuntu 12.04. So to test the packages in development mode I cant move for Ubuntu 13.10 everytime. is there any environment where I ...
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58 views

Lenovo y500 jerky mouse

My mouse jitters to anywhere within an inch of it original position as soon as i lift my finger of the touchpad. Its petty annoying to say the least with these small buttons. I have a lenovo Y500 with ...
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2answers
132 views

Why debug packages don't include sources?

I was expecting that after installing the package libgtk-3-0-dbg I would get DDD to show the source code when stepping into gtk+, however I had to download the source package myself (from here) and ...
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96 views

Why is the libindicator reporting all scroll event signals as UP?

I am trying to investigate this bug; the gist is, if you have a Unity application indicator, and you scroll over it, the scroll event is always 'up', even if you scroll down. Here is a sample ...
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0answers
47 views

Erroneous Character Input

Summary: With default install of 12.04LTS on a Dell XT2 the g key activates g5, G% with uppercase. H and " present the same issue. With xev I can see 4 codes for each physical keystroke of these ...
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68 views

how to get the address with /proc/kallsyms

cat /proc/kallsyms | grep "\ doexecve$" i run this command in ubuntu 13.04 in virtual box in order to get address. However, no result. How to get the address for kprobe debug
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2answers
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How do I troubleshoot boot problems when stuck at the Ubuntu splash screen?

I was tweaking some settings on my Ubuntu 12.04 install. Specifically I was altering the default color scheme of the terminal, following these instructions Now whenever I boot Ubuntu, I get stuck in ...
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1answer
62 views

How to debug executable (using gdb) that reads another file?

I have a small application let's call it program. In general to use this application I need to stream a file into it: ./program < file_with_data.txt How do I debug such program using dbg? I ...
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1answer
235 views

KDbg on Ubuntu 10.04 LTS [closed]

I wanted a good debugger gui for gdb and found that KDbg is the best one. When I tried searching for it in Synaptic Package Manager I could not found it, then after a bit of googling found out that it ...
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54 views

How can I use debugging symbols for wxwidgets in gdb?

The debugging packages for wxwidgets install separate libraries named e.g. libwx_gtk2ud_core-2.8.so, where the ud part indicates debugging builds, rather than debugging symbols for the standard ...
0
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1answer
46 views

Glade GUI in Python 2.7 crashes

I created a simple program using a glade .xml file and it, whenever I run the program, it crashes! Here's the Python code: #!/usr/bin/env python import pygtk pygtk.require("2.0") import gtk class ...
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0answers
109 views

ACPI: EC: Input buffer not empty aborting transsaction

Everytime I boot up Ubuntu, after a few hours, when I press Ctrl+Alt+F2 I get a flood of this messaage! I have this error since I first started to use Ubuntu a few years ago. It's frustrating! When I ...
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1answer
313 views

Is there a virus active in my Ubuntu? [closed]

I m Using Ubuntu 13.04. Whenever I insert any external memory card or pan drive, a new folder Trash is generated there, which uses huge space of it.. The most important thing is that it is not ...
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3answers
1k views

Choosing C++ debugger on linux

I recently changed from Windows where I was using Qt Creator to Ubuntu. The problem is that Qt Creator in Ubuntu can't properly debug due to some problem attaching ptrace to the program which was ...
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95 views

Inner object properties are not shown in Qt Creator in debugging mode

I'm using Qt Creator 2.6.82 on Ubuntu 12.10. I wanted to figure out if some properties are correctly set, but I can't see them. This is the deepest I can get (I can't even open the QObject node) ...
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1answer
43 views

Graphical Bug: how to debug?

I have been experiencing a strange graphical bug which I'd like to report on Launchpad. The bug occurs randomly when pressing mouse buttons in some applications, like for example when I resize ...
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73 views

Which component has a bug which causes only some TGA files to have working thumbnails in Nautilus, Eye-of-Gnome and Grub Customizer?

How to reproduce: install 12.04 sudo apt-get install grub2-splashimages navigate Nautilus to /usr/share/images/grub2 observe that only two of the TGA files have thumbnails. install Grub Customizer ...
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2answers
3k views

Asking all remaining processes to terminate… fail

Ubuntu 12.10 64 bits with Unity. When I restart or shutdown the PC, it takes too long to do it. It shows the line Asking all remaining processes to terminate... [fail] and after Killing all remaining ...
5
votes
1answer
1k views

How can I debug my wireless problem?

How can I get started with debugging my wireless problem? How can I tell whether or not Linux has recognized my wireless hardware at all? What are the main programs/daemons associated with wireless ...
0
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1answer
62 views

Problem with jdb debugger

I am trying to use Ubuntu 12.04 lts on a system76 box. when I try to run the java debugger, jdb, i get a timeout after i attempt to run the application. i have tried several things and I think the ...