openSUSE Leap 42.1

Release Notes

openSUSE Leap is a free and Linux-based operating system for your PC, Laptop or Server. You can surf the web, manage your e-mails and photos, do office work, play videos or music and have a lot of fun!

Publication date: 2017-04-27, Version: 42.1.20170427.0449218

If you upgrade from an older version to this openSUSE Leap release, see previous release notes listed here: (

1 Installation

This section contains installation-related notes. For detailed upgrade instructions, see the documentation at

1.1 Minimal System Installation

In order to avoid some big recommended packages from being installed, the pattern for minimal installations uses another pattern that creates conflicts with undesired packages. This pattern, patterns-openSUSE-minimal_base-conflicts, can be removed after installation.

Note that the minimal installation has no firewall by default. If you need one, install SuSEfirewall2.

1.2 UEFI—Unified Extensible Firmware Interface

Prior to installing openSUSE on a system that boots using UEFI (Unified Extensible Firmware Interface), you are urgently advised to check for any firmware updates the hardware vendor recommends and, if available, to install such an update. A pre-installed Windows 8 is a strong indication that your system boots using UEFI.

Background: Some UEFI firmware has bugs that cause it to break if too much data gets written to the UEFI storage area. Nobody really knows how much "too much" is, though. openSUSE minimizes the risk by not writing more than the bare minimum required to boot the OS. The minimum means telling the UEFI firmware about the location of the openSUSE boot loader. Upstream Linux kernel features that use the UEFI storage area for storing boot and crash information (pstore) have been disabled by default. Nevertheless, it is recommended to install any firmware updates the hardware vendor recommends.

1.3 UEFI, GPT, and MS-DOS Partitions

Together with the EFI/UEFI specification, a new style of partitioning arrived: GPT (GUID Partition Table). This new schema uses globally unique identifiers (128-bit values displayed in 32 hexadecimal digits) to identify devices and partition types.

Additionally, the UEFI specification also allows legacy MBR (MS-DOS) partitions. The Linux boot loaders (ELILO or GRUB2) try to automatically generate a GUID for those legacy partitions, and write them to the firmware. Such a GUID can change frequently, causing a rewrite in the firmware. A rewrite consist of two different operation: removing the old entry and creating a new entry that replaces the first one.

Modern firmware has a garbage collector that collects deleted entries and frees the memory reserved for old entries. A problem arises when faulty firmware does not collect and free those entries; this may end up with a non-bootable system.

The workaround is simple: convert the legacy MBR partition to the new GPT to avoid this problem completely.

2 System Upgrade

This section lists notes related to upgrading the system. For detailed upgrade instructions, see the documentation at

2.1 Network Interface Names

When upgrading a remote machine from openSUSE 13.2, make sure your network interfaces are named correctly.

openSUSE 13.2 used so-called predictable network interface names (for example, enp5s0), whereas openSUSE Leap 42.1 uses persistent interface names (eth0). After upgrading and rebooting, the network interface names may therefore change. This could lock you out of the system. To avoid interfaces from being renamed, run the following command for each of your network interfaces before you reboot the system:

/usr/lib/udev/udev-generate-persistent-rule -v -c enp5s0 -n enp5s0 -o /etc/udev/rules.d/70-persistent-net.rules

Replace enp5s0 with the name of your network interface.

2.2 Btrfs: Disk Space Leak after System Rollbacks

By default, openSUSE 13.2 used a Btrfs partition layout that allowed for disk space to become permanently occupied with stale, inaccessible contents after the first system rollback was executed. This layout issue was fixed in openSUSE Leap 42.1. However, the fix can only be applied to newly installed systems.

If you are upgrading from openSUSE 13.2, you cannot convert the file system to the new layout, but you can reclaim the lost disk space.

Warning: Data Loss with Non-Standard Settings or No Rollbacks

The following procedure will only work properly on installations set up using the default proposal created by the openSUSE 13.2 installer.

Additionally, you must have previously made a system rollback.

If you have set up your Btrfs file system with a non-standard configuration or have not previously made a system rollback, executing the following procedure can incur data loss.

  1. Mount the initial root filesystem:

    mount /dev/<ROOT_FILE_SYSTEM> -o subvolid=5 /mnt
  2. Remove all files below /mnt that are not in a subvolume:

    find /mnt -xdev -delete
  3. Umount the filesystem again:

    umount /mnt

3 General

3.1 Non-Oss Repository

After the installation, the non-oss repository is disabled.

Enable the openSUSE-Leap-42.1-Non-Oss repository using YaST or on the command line using zypper:

zypper mr -e repo-non-oss

4 Technical

4.1 Printing System: Improvements and Incompatible Changes

CUPS Version Upgrade to 1.7

The new CUPS version introduced some major changes compared to 1.5 that may require manual configuration adjustments.

5 Miscellaneous

5.1 KDE and Network Authentication

When using the KDE display manager SDDM with an authentication method that provides a high number of users, SDDM becomes unusable. Additionally, if the automounter is used, SDDM may block for a long time on startup trying to mount every user's home.

Modify /etc/sddm.conf to contain the following entries:



See ( for details.

5.2 No Screensaver Support in KDE Plasma

KDE Plasma does not support screensavers by default. If you prefer to have a screensaver, install the package xscreensaver.

Set xscreensaver to start with the desktop session by selecting K › Settings › Configure Desktop, then choose Startup and Shutdown › Autostart. Click Add Program, type xscreensaver and click OK.

To configure the screensaver, use xscreensaver-demo.

6 More Information and Feedback

  • Read the README documents on the medium.

  • View a detailed changelog information about a particular package from its RPM:

    rpm --changelog -qp FILENAME.rpm

    Replace FILENAME with the name of the RPM.

  • Check the ChangeLog file in the top level of the medium for a chronological log of all changes made to the updated packages.

  • Find more information in the docu directory on the medium.

  • ( contains additional or updated documentation.

  • Visit ( for the latest product news from openSUSE.

Copyright © 2015 SUSE LLC

Thanks for using openSUSE.

The openSUSE Team.

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