Questions tagged [debug]

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

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21 votes
2 answers
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How do I debug when the system freezes or when it crashes back to login?

I am fairly new to Ubuntu and I was wonder what a good way is to debug when something crashes? For example: I installed 11.04 and the default media player banshee makes my laptop crash after a few ...
Pickels's user avatar
  • 495
45 votes
7 answers
49k views

How can I diagnose/debug "maximum number of clients reached" X errors?

I'm hitting a problem whereby X prevents processes from creating windows, uttering something like the following into ~/.xsession-errors: cannot open display: :0.0 Maximum number of clients reached ...
jmtd's user avatar
  • 926
74 votes
2 answers
88k views

after upgrade gdb won't attach to process

I just recently upgraded from 10.04 to 11.04 and gdb won't allow me to attach to processes anymore I get the error Attaching to process 10144 Could not attach to process. If your uid matches ...
Andrew Redd's user avatar
  • 2,157
15 votes
1 answer
13k 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 ...
fouric's user avatar
  • 4,588
4 votes
1 answer
13k views

How do I get rid of /sys/kernel/debug/tracing?

I have two Ubuntu 16.04.1 servers providing DHCP and DNS services on my network. Today, on one of my servers, I discovered a new filesystem mounted at /sys/kernel/debug/tracing. The other server, ...
William Jackson's user avatar
3 votes
1 answer
1k views

Identify element requesting sound chip to sleep

Since a few months the sound is suddenly stopping on my laptop after some time. My computer is a Toshiba Satellite L755 with a Conexant CX20585 sound chip, running Ubuntu 17.04. I found out that this ...
dohseven's user avatar
3 votes
2 answers
2k views

What is wrong with ddebs.ubuntu.com

Did something expire that should not have? I am using debug symbols on my Ubuntu 20.10 install, and now I get this when I run the apt-get update command. W: An error occurred during the signature ...
Bram's user avatar
  • 2,469
29 votes
4 answers
31k views

bash: set -x logs to file

I have a shell script with set -x to have verbose/debug output: #!/bin/bash set -x command1 command2 ... The output looks like this: + command1 whatever output from command1 + command2 whatever ...
redseven's user avatar
  • 716
8 votes
1 answer
2k views

What are -dbg packages for?

1- What are -dbg packages really for? 2- Is it a good/bad idea to install them for, at least, my preferred applications/packages? 3- Does installing them for my preferred applications/packages helps ...
malhobayyeb's user avatar
  • 1,422
6 votes
1 answer
1k views

Missing fonts cause LibreOffice Impress to mess up the layout of the slides

I have reported a LibreOffice Impress bug here. In that bug, the text of a slide went beyond the page margin Although it looked fine in Microsoft PowerPoint Now I cannot reproduce the bug anymore. ...
robertspierre's user avatar
6 votes
3 answers
2k views

How can I find out what is causing my gnome-panel to freeze? [closed]

About once a day my gnome-panel freezes. How can I produce some sort of debug information to: Figure out what is causing the freeze or File a bug or see if its an existing bug When gdb is attached ...
Niall Murphy's user avatar
5 votes
1 answer
5k views

How can I debug why gnome-settings-daemon-localeexec is not started on login?

I am using Ubuntu Gnome 14.04 and gnome-settings-daemon-localeexec is not started on login. How can I debug why this is happening? I've found this question: gnome-settings-daemon not starting when I ...
adosaiguas's user avatar
5 votes
2 answers
846 views

Where are the debug symbols for plasmashell (Kubuntu 19.04)?

I'm having an issue with plasmashell crashing anytime I leave the computer alone for more than an hour or two. I've tried installing debugging symbols to generate a useful crash report, but keep ...
Jonathan Watts's user avatar
4 votes
0 answers
1k views

PlayOnLinux: Microsoft Office 2013 Please wait while the virtual drive is being created

I recently faced a bug while trying to install Microsoft Office 2013 though PlayOnLinux on Ubuntu 18.04. The installation did a kind of infinite loop during the following step: Please wait while ...
Ced's user avatar
  • 823
3 votes
1 answer
2k views

Ubuntu freezes a few minutes after login

I use Ubuntu 15.10 (running from the disk) I run diagnostics and the disk doesn't seem to have any problems nor my drive should have (it and "expensive" bd-r DVD-r drive from a big brand and never had ...
papajo's user avatar
  • 2,977
1 vote
2 answers
4k views

Slack 3.3.3 crash on Ubuntu 18.10

I have installed the latest Slack 3.3.3 from the official website. Downloaded the deb package, but when i start it, it simply crash and nothing happens. It was working fine on Ubuntu 18.04. Is there a ...
Dimitar's user avatar
  • 474
0 votes
0 answers
603 views

How to troubleshoot application crashes (find a minidump or stacktrace)

I just installed Ubuntu 18.04.1 on a server, and compiled Povray v3.8.0-alpha.9861167+av620. It works nicely with some test scenes, but it seems to have a memory leak when rendering my particular ...
Louis Somers's user avatar
0 votes
0 answers
1k views

FAHClient cannot connect on Ubuntu 19.10

I've been running FAHClient successfully for one day now, and hence been contributing to the protein folding project. ... Well, I was until I recently booted my system. Now, the client won't connect, ...
Jayaguru-Shishya's user avatar