Known issues and solutions
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Discord might not work due to ‘opera-ffmpeg-codecs’ update
You may want to ignore the opera-ffmpeg-codecs update or use the flatpak version of Discord until upstream adopts to the changes made.
nvidia 455.28 is incompatible with linux >= 5.9
2020-10-21 - Sven-Hendrik Haase
nvidia is currently partially incompatible with linux >= 5.9 [1] [2]. While graphics should work fine, CUDA, OpenCL, and likely other features are broken. Users who’ve already upgraded and need those features are advised to switch to the linux-lts kernel for the time being until a fix for nvidia is available.
https://www.archlinux.org/news/nvidia-45528-is-incompatible-with-linux-59/
libtraceevent>=5.9-1 update requires manual intervention
2020-10-23 - Sébastien Luttringer
The libtraceevent package prior to version 5.9-1 was missing a soname link. This has been fixed in 5.9-1, so the upgrade will need to overwrite the untracked files created by ldconfig. If you get any of these errors
libtraceevent: /usr/lib/libtraceevent.so.1 exists in filesystemwhen updating, use
pacman -Syu --overwrite /usr/lib/libtraceevent.so.1to perform the upgrade.
https://www.archlinux.org/news/libtraceevent59-1-update-requires-manual-intervention/
Older Issues
PAM and PAMBASE got updated, which might prevent you from login
Due to updates from pambase and pam you might take care about any .pacnew files in /etc/pam.d as for example pam_tally, pam_tally2 and pam_cracklib got deprecated. Read in the ArchWiki about managing those files.
Typical issue:
For recovery, it is enough to boot with kernel option “systemd.unit=rescue.target”, then proceed into /etc/pam.d and merge “system-auth” and “system-auth.pacnew”
System takes a long time to boot
If you’ve got errors like Failed to start Network Manager Wait Online. you can try removing systemd from passwd and group in /etc/nsswitch.conf as described here
Update: If you can see the line
dbus-daemon[1453]: [system] Connection has not authenticated soon enough, closing it (auth_timeout=30000ms, elapsed: 45146ms)
in in your dbus log ( journalctl -b -u dbus ), the new/better workaround is to switch cups from service to socket as described here:
systemctl disable org.cups.cupsd.service
systemctl enable org.cups.cupsd.socket
I think I’ve some font problems
With the update of fontconfig some major rules how fonts get applied changed. Make sure that your system has ttf-dejavu installed. A more in depth explanation can be found here.
Gnome-shell-extension-pop-shell is currently incompatible with wayland
… and causes the system to freeze when the first window is tiled and can render it unbootable. Solution is a hard reset and disabling either pop shell or wayland. If the system becomes unbootable, use a live USB to edit /etc/gdm/custom.conf to disable wayland and reboot.