= How to report Ubuntu crashes
{wiki}
Their crash system does not have an amazing user interface.
Tested on <Ubuntu 21.10>.
After something crashes, look under `/var/crash` for a crash file, which helps to determine which package to report under on <Launchpad (website)>.
E.g. a file `/var/crash/_usr_sbin_gdm3.0.crash` makes you want to file the bug under gdm at: https://bugs.launchpad.net/ubuntu/+source/gdm/+filebug
Then, while reporting the bug, you want to give the developpers access to that `.crash` file. But you can't publicly upload it because it contains memory dumps and could contain secret information. The way to do it is to look at the ID under:
``
sudo cat /var/crash/_usr_sbin_gdm3.0.uploaded
``
Ubuntu's crash report system has already uploaded the `.crash` for you, so you just have to confirm it and give the ID on the ticket.
You can view a list of all your uploaded errors at:
``
xdg-open https://errors.ubuntu.com/user/$(sudo cat /var/lib/whoopsie/whoopsie-id)
``
and each of those contain a link to:
``
https://errors.ubuntu.com/oops/<.uloaded error id>
``
which you yourself cannot see.
https://askubuntu.com/questions/434431/how-can-i-read-a-crash-file-from-var-crash asks how to read the `.crash` files.
Running:
``
sudo apport-unpack /var/crash/_usr_sbin_gdm3.0.crash /tmp/app
``
splits it up into a few files, but does not make any major improvements.
`apport-retrace`
``
sudo apt install apport-retrace
sudo chmod 666 /var/crash/_usr_sbin_gdm3.0.crash
apport-retrace -g /var/crash/_usr_sbin_gdm3.0.crash
``
opens GDB with the core dump. Debug symbols are supplied as separate packages, which is a really cool idea: so you should be able to download them after the crash to see symbols. https://askubuntu.com/questions/487222/how-to-install-debug-symbols-for-installed-packages mentions how to install them. Official docs at: https://wiki.ubuntu.com/DebuggingProgramCrash\#Debug_Symbol_Packages
Tried:
``
echo "deb http://ddebs.ubuntu.com $(lsb_release -cs) main restricted universe multiverse" | sudo tee -a /etc/apt/sources.list.d/ddebs.list
echo -e "deb http://ddebs.ubuntu.com $(lsb_release -cs)-updates main restricted universe multiverse\ndeb http://ddebs.ubuntu.com $(lsb_release -cs)-proposed main restricted universe multiverse" | sudo tee -a /etc/apt/sources.list.d/ddebs.list
sudo apt install ubuntu-dbgsym-keyring
``
but then `sudo apt update` fails with:
``
E: The repository 'http://ddebs.ubuntu.com impish-security Release' does not have a Release file.
``