Discord's dependencies on Debian based distros (includes Ubuntu based distros which also includes Mint):
libc6, libasound2, libatomic1, libgconf-2-4, libnotify4, libnspr4, libnss3, libstdc++6, libxss1, libxtst6, libappindicator1, libc++1
glibc, alsa-lib, gcc-libs, gconf, libnotify, nspr, nss, libxss, libxtst, libc++ (libc++ is installed from the AUR)
libatomic, glibc, alsa-lib, GConf2, libnotify, nspr >= 4.13, nss >= 3.27, libstdc++, libX11 >= 1.6, libXtst >= 1.2, libappindicator, libcxx, libXScrnSaver
libatomic1, glibc, alsa, gconf2, libnotify, mozilla-nspr >= 4.13, mozilla-nss >= 3.27, libstdc++6, libX11 >= 1.6, libXtst >= 1.2, libappindicator, libc++1, libXScrnSaver
If Discord crashes before it loads, most times this is caused by the user missing libc++1/libc++/libcxx. Having too old of a version of libc++1/libc++/libcxx can also cause Discord to crash before it loads. A couple of examples of Discord's output in a terminal when this happens are shown below:
DiscordCanary[7645]: segfault at 0 ... error 4 in libc-2.23.so ...
exception_ptr not yet implemented
Steps to solve this issue:
Debian/Ubuntu/Mint:
sudo apt-get install libc++1
Arch Linux:
See the AUR page for libc++ for install instructions
Fedora:
sudo dnf install libcxx
openSUSE:
sudo zypper install libc++1
CentOS/Others:
If the user is running a distribution such as CentOS which has too old of a version of libc++1/libc++/libcxx, they will not be able to run Discord without either adding an additional repository to update their libc++1/libc++/libcxx version or they can use the AppImage builds of Discord which contain all of the necessary dependencies for Discord to run (including an up to date libc++1/libc++/libcxx).
If a red banner shows at the top of the Discord client on Linux saying that the install is corrupt, this is almost always caused by the user missing libatomic1/libatomic. Some users have also reported that voice chat does not work properly without libatomic1/libatomic installed.
Steps to solve this issue:
Ubuntu/Debian/Mint:
sudo apt-get install libatomic1
Arch Linux:
sudo pacman -S gcc-libs
Fedora/CentOS:
sudo dnf install libatomic
openSUSE:
sudo zypper install libatomic1
If the user is not running a notification daemon (such as notify-osd, notification-daemon, dunst, etc), Discord will appear to freeze for a few seconds every time that the Discord client tries to send a desktop notification (when the user gets a mention, DM, etc). This can be solved by either disabling notifications in Discord's settings or by installing a notification daemon.
Steps to solve this issue:
There are multiple notification daemons that the user may choose to install. If a user is not running a notification daemon, it is usually because they are not running a Desktop Environment which would provide one for them. Both dunst and notify-osd are lightweight notification daemons that are commonly installed without a Desktop Environment. The examples below show how to install notify-osd
Ubuntu/Debian/Mint:
sudo apt-get install notify-osd
Arch Linux:
sudo pacman -S notify-osd
Fedora:
sudo dnf install notify-osd
openSUSE:
sudo zypper install notify-osd
Sometimes, the app refuses to start even if all dependencies are satisfied. If you decide to try reinstalling Discord, make sure the Discord's config folder is deleted (for Arch Linux, this config is located on ~/.config/discord) as there might be some corrupted/edited file that prevents Discord from loading successfully.
Discord uses a setting that only works with GNOME based Desktop Environments, so any user who is running a different Desktop Environment (such as KDE Plasma, LXDE, LXQt, etc) will not be able to disable having Discord launch on startup after it has been enabled the first time. To fix this, the user can just delete Discord's .desktop file in ~/.config/autostart, but this issue will reappear if the user ever touches the setting within the client again.
Recently, Discord's voice chat has stopped working if the user does not have pulseaudio installed. Users have reported that notification sounds work fine, but Discord does not detect any input or output devices for voice chat. To fix this, the user can install pulseaudio. As an alternative, the user may also be able to use apulse, but some users have reported that apulse does not work.