Known issues and solutions
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2023-09-27
Changes to default password hashing algorithm and umask settings
2023-09-22 - David Runge
With shadow >= 4.14.0, Arch Linux’s default password hashing algorithm changed from SHA512 to yescrypt [1].
Furthermore, the umask [2] settings are now configured in /etc/login.defs instead of /etc/profile.
This should not require any manual intervention.
Reasons for Yescrypt
The password-based key derivation function (KDF) and password hashing scheme yescrypt has been chosen due to its adoption (readily available in libxcrypt, which is used by pam [3]) and its stronger resilience towards password cracking attempts over SHA512.
Although the winner of the Password Hashing Competition [4] has been argon2, this even more resilient algorithm is not yet available in libxcrypt [5][6].
Configuring yescrypt
The YESCRYPT_COST_FACTOR setting in /etc/login.defs is currently without effect, until pam implements reading its value [7]. If a YESCRYPT_COST_FACTOR higher (or lower) than the default (5) is needed, it can be set using the rounds option of the pam_unix [8] module (i.e. in /etc/pam.d/system-auth).
General list of changes
- yescrypt is used as default password hashing algorithm, instead of SHA512
- pam honors the chosen
ENCRYPT_METHOD in /etc/login.defs and does not override the chosen method anymore
- changes in the filesystem (>=
2023.09.18) and pambase (>= 20230918) packages ensure, that umask is set centrally in /etc/login.defs instead of /etc/profile
[1] yescrypt - scalable KDF and password hashing scheme
[2] umask(1p) — Arch manual pages
[3] PAM - ArchWiki
[4] https://www.password-hashing.net/
[5] [RFC] Add argon2 backend. by ferivoz · Pull Request #113 · besser82/libxcrypt · GitHub
[6] Add support for Argon2 by maandree · Pull Request #150 · besser82/libxcrypt · GitHub
[7] pam_unix: Support reading YESCRYPT_COST_FACTOR from /etc/login.defs · Issue #607 · linux-pam/linux-pam · GitHub
[8] pam_unix(8) — Arch manual pages
– Arch Linux - News: Changes to default password hashing algorithm and umask settings
2023-09-06
filesystem and bashrc-manjaro pacnews
With the filesystem 2023.09.03-1 and bashrc-manjaro 5.1.016-3 updates there may be pacnews for the following files if you have local modifications:
/etc/shells/etc/bash.bashrc
This would be a good time to test @Ste74’s new manjaro-pacnew-checker program. See Check and manage pacnew files for more info.
2023-08-25
ansible-core >= 2.15.3-1 update may require manual intervention
2023-08-19 - Robin Candau
As of ansible-core 2.15.3, upstream moved documentation and examples to a separate dedicated repository (see the related changelogs).
This means that, starting from version 2.15.3 the ansible-core package will stop shipping documentation and a default configuration example under /etc/ansible/ansible.cfg.
Regarding the documentation, it is available online: https://docs.ansible.com/
As for the configuration file, as explained in the wiki, a base config can be generated with the following command:
ansible-config init --disabled > ansible.cfg
After updating from ansible-core <= 2.15.2-1 to >= 2.15.3-1, everyone using a custom global Ansible configuration file stored under /etc/ansible/ansible.cfg will have their configuration saved as a pacsave file.
To restore it, run the following command:
mv /etc/ansible/ansible.cfg.pacsave /etc/ansible/ansible.cfg
– Arch Linux - News: ansible-core >= 2.15.3-1 update may require manual intervention
2023-08-04
Possible glibc 2.38 posix_memalign regression
There seems a performance regression of posix_memalign in Glibc-2.38. More info here: 30723 – Poor posix_memalign performance with long free lists
Workarounds:
You can try another malloc like mimalloc or jemalloc as workaround. Install mimalloc and start mpv with:
LD_PRELOAD=/usr/lib/libmimalloc.so mpv
or
LD_PRELOAD=/usr/lib/libjemalloc.so mpv
For folks that dont want to change things too much … an apparent workaround is to set a lowish cache size:
mkdir -p ~/.config/mpv && printf '\ndemuxer-max-bytes=50MiB\ndemuxer-max-back-bytes=25MiB\n' | tee -a ~/.config/mpv/mpv.conf
budgie-desktop >= 10.7.2-6 update requires manual intervention
When upgrading from budgie-desktop 10.7.2-5 to 10.7.2-6, the package mutter43 must be replaced with magpie-wm, which currently depends on mutter. As mutter43 conflicts with mutter, manual intervention is required to complete the upgrade.
First remove mutter43, then immediately perform the upgrade. Do not relog or reboot between these steps.
pacman -Rdd mutter43
pacman -Syu
2023-07-28
Grub conflicting files
Error: Failed to commit transaction:
conflicting files:
grub: /usr/bin/update-grub already exists in filesystem (owned by grub-update)
sudo pacman -Rdd grub-update
sudo pacman -Suu grub
[1] [2] [3]
2023-07-24
One core of CPU has high IO-wait operation at 100%
[Unstable Update] 2023-05-21 - Repository changes - #199 by Zesko
Kernel 6.4.4, 6.4.5 and 6.1.39 LTS are affected:
The known issue and report:
2023-07-15
Steam crashes on startup with lib32-libgudev installed
The latest lib32-libgudev update does not cooperate with the version of the same package provided by steam, and steam seems to attempt making calls to both leading to the crash.
Details: bug report, arch task, arch forum thread.
-
Workaround #1 (causes steam to avoid making any calls to lib32-libgudev by using a different library altogether)
sudo pacman -S lib32-libnm
-
Workaround #2 (forces steam and any other application to always use the new lib32-libgudev)
sudo pacman -S lib32-libudev0-shim
-
Workaround #3 (use steam-native-runtime, which doesn’t have the issue)
sudo pacman -S steam-native-runtime
2023-06-27
possible kernel bug for amdgpu users
[Testing Update] 2023-06-27 - Kernels, Linux-Firmware, Mesa, Wine, Nvidia, KDE-git - #4 by xvin
2023-06-24
Pamac GUI theme does not match theme for Xfce
pamac-gtk 11.0.1 uses Gtk 4 that is not supported by Xfce
user can replace pamac-gtk with pamac-gtk3
pamac install pamac-gtk3
TeX Live package reorganization
2023-06-18 - Antonio Rojas
Starting from version 2023.66594-9, TeX Live packages have been reorganized to mirror upstream collections. Even though the new texlive-basic replaces the old texlive-core, many of the texlive-core contents (including language specific files) are now split between different packages. To find out which Arch package contains a specific CTAN package, you can use the tlmgr utility, eg.
$ tlmgr info euler | grep collection
collection: collection-latexrecommended
which means the euler CTAN package is contained in texlive-latexrecommended. You may also use pacman -F to query for specific files.
A new metapackage texlive-meta is available to install all subpackages (except for language specific ones), and the new texlive-doc package provides the full documentation for offline use.
– Arch Linux - News: TeX Live package reorganization
2023-06-15
The "community" repository has been merged into "extra" and is now empty
The [community] repository has been merged into [extra] and is now empty. It may take a bit of time for mirrors to catch up.
Update your system and merge the pacman pacnew /etc/pacman.conf.pacnew file.
sudo pacman -Syu "pacman>=6.0.2-11"
OpenBLAS >= 0.3.23-2 update requires manual intervention
2023-06-14 - Felix Yan
The openblas package prior to version 0.3.23-2 doesn’t ship optimized LAPACK routine and CBLAS/LAPACKE interfaces for compatibility. This decision has been reverted now, and the ability to choose a different default system BLAS/LAPACK implementation while keeping openblas installed is now provided to allow future co-installation of BLIS, ATLAS, etc.
wiki post
The default BLAS implementation will be used for most packages like NumPy or R. Please install blas-openblas and blas64-openblas to make OpenBLAS the default BLAS implementation, just like the old behavior.
Unfortunately you will get errors on updating if you currently have OpenBLAS installed as the default BLAS implementation:
error: failed to prepare transaction (could not satisfy dependencies)
:: installing openblas (0.3.23-2) breaks dependency 'blas' required by cblas
:: installing openblas (0.3.23-2) breaks dependency 'blas' required by lapack
Please append your preferred default BLAS implementation to the regular -Syu command line to get around it. For example:
sudo pacman -Syu blas-openblas
or
sudo pacman -Syu blas
– Arch Linux - News: OpenBLAS >= 0.3.23-2 update requires manual intervention
Previous testing threads:
You will need to rebuild any AUR Python packages that install files to site-packages or link to 
AUR (Arch User Repository) packages are neither supported by Arch nor Manjaro. Posts about them in Announcement topics are off-topic and will be flagged, moved or removed without warning.