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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64 views

Is Ubuntu LTS running a DEBUG kernel?

I found this in my system log: [ 14.845195] ********************************************************** [ 14.845196] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE ** [ 14.845196] ** ...
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53 views

dynamic debug permission issue (k5.0.0)

When I attempt to read or modify the kernel dynamic_debug settings, I encounter a permissions issue. root@roberto:/sys/kernel/debug/dynamic_debug# cat control cat: control: Operation not permitted I'...
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186 views

How to enable IPTABLES tracing on ubuntu 18.04 server

Ive found this simple straightforward way to trace what Iptables is doing on my kubernetes/calico cluster https://www.opsist.com/blog/2015/08/11/how-do-i-see-what-iptables-is-doing.html Nor ipt_LOG, ...
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27 views

My session automatically closes when starting a certain type of App

I am new to Ubuntu. I just did an install of Ubuntu alongside Windows. Everything works perfectly except for one thing: Ubuntu crashes. It's not a regular event, but it happens when I open ...
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36 views

Cannot install qt5core debug symbols

After following the instruction ot activate the debug repositories here, I have tried to install the debug symbols for libQtCore5 but without success. Here is my log: sudo apt-get install ...
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1answer
237 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 ...
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593 views

How to solve warnings from GDB?

I need help about debugging GIMP 2.10.10 O.S. Ubuntu 18.04.2 LTS GDB Version (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git I get this message from GDB when i try to generate a backtrace inside flatpak ...
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93 views

usb 1-1: device descriptor read/64, error -71 [duplicate]

I cannot connect my phone to the computer. I accidentally erased the operating system of the mobile and I need to debug it. It's not reconized on windows. On linux using dmesg | grep -i usb, showed ...
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56 views

Reset debug/verbose mode logging in bash script

I use a cronjob as root to check via lsof if some remote machines have established an ssh tunnel to the main server (root, otherwise lsof and netstat won't show the username and sshd pid). Then for ...
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0answers
621 views

Stop the “System program problem detected.” pop-up without disabling error reporting

everytime I login on my computer, a pop-up appear containing: System program problem detected. And no further informations, I mean I don't have any clues on what's wrong I can just report it or ...
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377 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 ...
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2answers
2k views

Ubuntu 18.04 on Acer Spin 5 with \EFI\BOOT\mmx64.efi not found

I attempted to reinstall Ubuntu 18.04.1 on my Acer Spin 5. Installation appeared to go fine, but then when I restarted: Failed to open \EFI\BOOT\mmx64.efi - Not Found Failed to load image \EFI\BOOT\...
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2answers
3k 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 ...
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0answers
135 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 ...
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338 views

Kernel custom building not working due to missing “binary-generic” recipe

I am on Ubuntu 18.04 and I am trying to build my own kernel by this guide and this guide. Unfortunately the command: AUTOBUILD=1 fakeroot debian/rules binary-headers binary-generic binary-perarch ...
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0answers
395 views

How to have logs from a Lutris launched game?

I am trying to play fortnite with wine, but I have disconnection issues so I would like to have a closer look at what is happening. I have already tried to launch the launcher exe from the terminal ...
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443 views

How to fix random mouse jumping?

For some reason, a couple days ago my Ubuntu 16.04 partition started acting up. When I am typing or moving the mouse or clicking the mouse, every few seconds the mouse will randomly jump and click ...
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1answer
170 views

Which packages to install to get debugging symbols for Xorg server

Sometimes when resuming from suspend, my screen goes black, no input is accepted, and I'm forced to hard reboot. I discovered a core file, so I ran sudo gdb --core=/core which output: Core was ...
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0answers
244 views

Gnome shell segfaults - how to debug?

Gnome shell randomly segfaults: gnome-session[1703]: gnome-session-binary[1703] WARNING: Application 'org.gnome.Shell.desktop' killed by signal 11 I'm guessing it's some extensions' fault but i ...
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1answer
165 views

Why does dynamic debug control not print any variables?

I have checked the outputs of dynamic debug functions (more specifically netdev_dbg) in sys/kernel/debug/dynamic_debug/control file. The output has all static characters in formatting string (like %d ...
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0answers
737 views

“Error: No space left on device” when booting ubuntu

How would I repair the graphical OS from the terminal tty1? I'm given the error: Error: No space left on device. Even though there is enough space. Detailed description of the system: df -h ...
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0answers
225 views

gnome-shell freezing after opening lid/logging in

gnome-shell freezes almost every time I open the lid of my laptop, and once that happens there's nothing to do but to hard reboot from the power button. It also freezes sometimes after logging in ...
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1answer
220 views

Ubuntu 16.04 LTS randomly freezes

just freshly installed Ubuntu on my ASUS Aspire E15. It's alongside a Windows installation. Roughly 10 minutes into my boot (maybe longer), everything will just freeze. I can move the mouse but no ...
1
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1answer
859 views

cannot find - No such file or directory - libusb - Ubuntu 32 & 64 bit

I'm trying to write a program that transfers data to my device. I'm using libusb. I had many problems to install its package in both 32 & 64 bit edition of Ubuntu 16 LTS. Commands for ...
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1answer
2k views

Step-by-step booting with systemd

It may be duplicate of someone's question. If so I'm sorry, couldn't find answer. I'm mastering a very specific OS, based on Ubuntu server. I couldn't install OS on this hardware, so I set all system ...
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1answer
567 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 ...
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1answer
1k views

How one may enable debug/verbose mode during installation of Lubuntu?

Installation hangs on splash screen without indication what happened. Maybe it really working slowly on something and one should wait, maybe it is dead and something should be changed to make ...
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0answers
147 views

Interpret verbose output for ssh login

I have an ubuntu virtual machine running within my ubuntu desktop. The desktop is running an OpenSSH server and I am trying to ssh into it with an RSA key from the virtual machine's OpenSSH client. I ...
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1answer
7k 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, ...
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0answers
2k views

Genymotion no sound after virtualbox update [closed]

I have an old android virtual machine on Genymotion. I use it regularly and I have my apps on it. After a recent virtualbox update the audio had issues. Now I almost can't hear any sound. I can hear ...
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3answers
17k 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 ...
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0answers
99 views

14.04 update screwed my computer: relocation error everywhere!

I am running Xubuntu in an old PC. When I upgrade I got a few error messages but I didn't payed attention to them (I'm used to such things). Now, I have lot's of bugs. Basically, from what I was ...
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1answer
475 views

how to fix error creating a bootable USB stick of ubuntu-16.04 iso image?

Could you please help me to fix the bug (An uncaught exception was raised: invalid version string 'fn\x81\xe6\xe1\x8b\xef\xa3\xa861\xa6\xef') getting on creating a bootable USB stick of ubuntu 16.04 ...
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1answer
154 views

How do I debug a system crash probably caused by Chrome?

I have an issue on my Dell XPS 13 9343 laptop. I have used 14.04 15.04 and 15.10 on this machine and each one has been a fresh install (deleted the partition and made a new one of a slightly different ...
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0answers
36 views

upgraded to 16.04 LTS and everything is lost [duplicate]

everything is lost, my settings, half of my programs even plugins in browsers and their cookies.... also unity doesnt start when booting... after I log into my account I can see only the wallpaper (...
2
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1answer
1k views

Ubuntu freezes a few minutes after login

I use Ubuntu 15.10 (running from 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 ...
2
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1answer
217 views

How to receive a desktop notification on a kernel lockup or bug/warning?

Apport doesn't react at all on any segfaults/problems warnings that happen in kernel [modules], the only way I know of to see them is to check kernel log (dmesg). I'd like to receive a notification ...
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1answer
819 views

How to download dbgsym kernel for 15.10?

I have an issue trying to find the dbgsym kernel from the ww repositories. Unfortunately i cannot find it. My system crashes when running wine and chrome and i am trying to read the crash dump. ...
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1answer
352 views

booting debugging kernel for perf

I am trying to do some performance tests, I found out that most overhead is insde the kernel (kernel.kallsyms). So I need kernel with debuging symbols and extracted vmlinuz in order to run perf ...
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1answer
354 views

How to use DBG with a shell script program?

I'm having some problems with Ardour 4 in Ubuntu Studio 14.04 (it crashes in plugin search with the message 'segmentation fault (core dumped)'. So I’m trying to create a backtrace with DBG for it (in ...
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0answers
450 views

How do I disable the automatic fade to black on lock? (15.04)

I have an issue where I lock my desktop, and it will fade to black almost immediately. It does not always resume correctly when "waking up", so I'd like to disable the fading entirely. I have tried ...
1
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1answer
36 views

How to debug a process developed in C running as a Wi-Fi Access Point?

I have two processes developed in C. The first one is running as a WiFi Access Point in Ubuntu machine and the second is running as a controller in another Ubuntu machine in the ethernet network. This ...
0
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1answer
57 views

Should I install debug tools?

I've been a long time user of Ubuntu (Warty) Now I wonder if I should install debug tools for various installed software? I don't really understand how they work; for instance (have to be activated or ...
2
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1answer
575 views

How can I use --gdk-debug with GTK2 programs?

I want to view the GDK events received by a GTK 2 program (Xournal) for debugging purposes, which should be possible by passing the option --gdk-debug=events). However, the option apparently is passed ...
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1answer
583 views

Where to put “-p” for solving “pptpd is not running”?

I'm working with pptpd on 14.04 and got a problem that when run /etc/init.d/pptpd start and /etc/init.d/pptpd status, it states that /use/sbin/pptpd is not running. I'm searching for a reason and ...
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1answer
2k views

Can I debug PHP scripts running in Apache on Ubuntu?

Coming from the Microsoft world, where Visual Studio, Windows, and IIS seemingly play nice together, I can attach the Visual Studio debugger to the IIS process and debug code in play. When a web ...
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0answers
119 views

c++ debug jump back netbeans and eclipse

All the latest netbean ide and eclipse ide for c++ open some project and then rebuild and debug, it will somehow jump back to somewhere when I press step over,like this (from 44 to 40): Can someone ...
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1answer
5k views

How to debug initramfs scripts?

For my Ubuntu 14.04 setup, I have 4 LUKS partitions that work as backing block devices form my BTRFS root partition. Using the default settings I could not get the 4 encrypted partitions unlocked at ...
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1answer
1k views

Grub2 mutual dependency issue

For various reasons I am installing .deb dependencies for grub2 using dpkg directly (rather than apt-get). root@ubuntu:/dl# dpkg -i grub-gfxpayload-lists_0.6_amd64.deb Selecting previously ...
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1answer
4k 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 ...