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This release is no longer supported, please seeReleases
WARNING: Release reached End of Life
These release notes forUbuntu 18.04.6 LTS (Bionic Beaver) provide an overview of the release and document the known issues with Ubuntu 18.04 LTS and its flavors. For details of the changes applied since 18.04, please see the18.04.5 change summary. The release notes for18.04,18.04.1,18.04.2,18.04.3 and18.04.4 are available as well.
The 'main' archive of Ubuntu 18.04 LTS will be supported for 5 years untilApril 2023. Ubuntu 18.04 LTS will be supported for 5 years for Ubuntu Desktop, Ubuntu Server, and Ubuntu Core. Ubuntu Studio 18.04 will be supported for 9 months. All other flavors will be supported for 3 years.
Find the links to release notes for official flavorshere.
Images can be downloaded from a location near you.
You can download ISOs and flashable images from:http://releases.ubuntu.com/18.04.6/ (Ubuntu Desktop and Server)
http://cdimage.ubuntu.com/ubuntu/releases/18.04.6/release/ (Less Popular Ubuntu Images)
http://cloud-images.ubuntu.com/daily/server/bionic/current/ (Ubuntu Cloud Images)
http://cdimage.ubuntu.com/netboot/18.04.5/ (Ubuntu Netboot)
http://cdimage.ubuntu.com/kubuntu/releases/18.04.5/release/ (Kubuntu)
http://cdimage.ubuntu.com/lubuntu/releases/18.04.5/release/ (Lubuntu and Lubuntu Alternate)
http://cdimage.ubuntu.com/ubuntu-budgie/releases/18.04.5/release/ (Ubuntu Budgie)
http://cdimage.ubuntu.com/ubuntukylin/releases/18.04.5/release/ (Ubuntu Kylin)
https://ubuntu-mate.org/download/ (Ubuntu MATE)
http://cdimage.ubuntu.com/xubuntu/releases/18.04.5/release/ (Xubuntu)
To upgrade on a desktop system:
Open the "Software & Updates" Setting in System Settings.
Press Alt+F2 and type update-manager -c into the command box.
If not you can run /usr/lib/ubuntu-release-upgrader/check-new-release-gtk
To upgrade on a server system:
Install update-manager-core if it is not already installed.
Make sure thePrompt line in /etc/update-manager/release-upgrades is set to 'normal' if you want non-LTS upgrades, or 'lts' if you only want LTS upgrades.
Launch the upgrade tool with the command sudo do-release-upgrade
Note that the server upgrade will use GNU screen and automatically re-attach in case of dropped connection problems.
There are no offline upgrade options for Ubuntu Desktop and Ubuntu Server. Please ensure you have network connectivity to one of the official mirrors or to a locally accessible mirror and follow the instructions above.
For other changes since 16.04 LTS, see the17.10 Release Notes,17.04 Release Notes and16.10 Release Notes.
Thepowerpc port is not included in the 18.04 release. Seeannouncement for details.
ppc64el support support continues as previously.
Ubuntu 18.04.4 ships with a v5.3 based Linux kernel updated from the v5.0 based kernel in 18.04.3. This enables the latest hardware and peripherals available from IBM, Intel, and others. The 18.04 kernel delivers new features inherited from upstream, including:
Preliminary support forWiFi 6 (802.11ax)
We also see notable Ubuntu specific achievements with:
FurtherAppArmor and security module improvements
As well as the usual myriad of bug fixes for supported platforms.
As of 18.04.4, OpenJDK 11 is the default in 18.04.
OpenJDK 8 has moved to universe and will remain available there for the life of 18.04, to provide migration time for packages, custom applications, or scripts that can't be build with OpenJDK 11. OpenJDK 8 will be updated in 18.04 until Ubuntu 16.04 LTS reaches EOL in April 2021.
The default OpenSSL has been upgraded from 1.1.0 to 1.1.1 LTS series bringing improved performance and ability to use TLSv1.3 in select packages. Co-installable 1.0.2n series OpenSSL remains to be available as well.
In Ubuntu 18.04 LTS, gcc is now set to default to compile applications as position independent executables (PIE) as well as with immediate binding, to make more effective use of Address Space Layout Randomization (ASLR). All packages in main have been rebuilt to take advantage of this, with a few exceptions.
Mitigations are in place to protect against Spectre and Meltdown. See theSpectre and Meltdown KnowledgeBase article for more details about the remediation andconfiguration options.
bolt andthunderbolt-tools have been promoted to main to provide security controls for Thunderbolt devices.
Since 17.10, the default SMB protocol used when mounting remote CIFS filesystems viamount.cifs (from thecifs-utils package) changed to 2.1 or higher, depending on what is negotiated with the server. If no version is specified when mounting such a remote share, the following will be logged:
No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3),from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3(or SMB2.1) specify vers=1.0 on mount.
Should you encounter compatibility issues, like#1764778 or#1572132, please specifyvers=1.0 when mounting the share and please file a bug if that fixes the problem for you.
Ubuntu now allows you to generate a signing key when needed, as you install third-party (DKMS) modules. On install of a DKMS package, you will be prompted to enter a password that is used to enroll a signing key (an X509 certificate) that will then be used to sign the new kernel modules. The prompts will allow you to enter the same password twice, and describe the steps needed to enroll the new key at the next reboot. For more information, seehttps://wiki.ubuntu.com/UEFI/SecureBoot/DKMS.
netplan.io has grown support for IPv6 Privacy Extensions, DHCP overrides, improved error reporting, support for WPA Enterprise wifi and 802.1x authentication, as well as support for IP tunnels.
netplan.io now will bring up network devices even if no IP address is specified for them, as long as they are configured in a file in /etc/netplan. This allows configuring "anonymous" bridges and integration with other networked services.
Teaming support with libteam is available inNetworkManager.
The default DNS resolver is systemd-resolved.
ifupdown has been deprecated in favor ofnetplan.io and is no longer present on new installs. The installer will generate a configuration file for netplan.io in the/etc/netplan directory. This netplan.io configuration in turn renders backend-specific configuration via either systemd-networkd orNetworkManager. Desktop users will see their system fully managed viaNetworkManager as it has been the case in previous releases. Server users will now see their network devices managed via systemd-networkd. This only applies to new installations.
Given thatifupdown is no longer installed by default, the commands:ifup andifdown are also unavailable. Please use theip command to achieve similar functionality, specificallyip link set $device up andip link set $device down.
Thenetworkctl command is now available for users to see a summary of network devices.networkctl status will display the current global state of IP addresses on the system.networkctl status $device displays details specific to a network device.
Theifupdown package remains available and supported in Ubuntu main for users that find netplan does not currently meet their networking needs.
For more information about netplan.io, please refer to the manual page using theman 5 netplan command or visithttps://netplan.io/.
Scripts in/etc/network/ifup.d and/etc/network/ifdown.d no longer work in this new configuration. For the systemd-networkd backend, similar scripts can be added into subdirectories of/usr/lib/networkd-dispatcher (dormant.d,no-carrier.d,off.d,routable.d), ifnetworkd-dispatcher is installed. Later on, custom scripts can be placed in/etc/networkd-dispatcher and potentially also override the ones in/usr/lib.
Thegpg binary is provided bygnupg2
For new installs, aswap file will be used by default instead of a swap partition.
Python 2 is no longer installed by default. Python 3 has been updated to 3.6. This is the last LTS release to include Python 2 in main.
The installer no longer offers the encrypted home option using ecryptfs-utils. It is recommended to use full-disk encryption instead for this release. (1756840)
OpenSSH now refuses to use RSA keys smaller than 1024 bits.ssh-keygen -l -f /path/to/key.pub can report the length of a key.
Fixed a bug which prevented the login screen from appearing on early generation Intel GPUs (Core2 and Atom etc) (1727356)
Fixed memory leak in Nautilus (1798426)
Fixed OSK bug preventing uppercase letters being entered (1730211)
Fixed bug where two instances of an application were launched if you touched on the dock (1745888)
Updated LibreOffice to 6.0.7
Fixed a bug which caused the dock to show on the lock screen (1769383)
Fixed a bug with Livepatch notifications startup ordering causing missing notifications (1809505)
Made some performance improvements to GNOME Shell (1803271,1743976)
X is the default display server.Wayland is provided as a Technical Preview and is expected to be the default display server in 20.04 LTS. To try it out, just chooseUbuntu on Wayland from the cog on the log in screen. X.org logs may now be found at ~/.local/share/xorg
The installer offers aminimal install option for a basic desktop environment with a web browser and core system utilities. Many official 18.04 desktop flavors are using this new feature too!
Apps provided by GNOME have been updated to3.28. For more details about GNOME 3.28, see theirRelease Notes.
LibreOffice has been updated to6.0.
Emoji now show incolor in most apps. Keyboard shortcuts for the emoji input chooser are Ctrl+. or Ctrl+;
Calendar now supports weather forecasts.
Some utilities have been switched to thesnap format for new installs (Calculator, Characters, Logs, and System Monitor). Snap apps provide better isolation which allows them to be upgraded to new stable releases during the LTS lifecycle.
TheCharacters app replaces the older Character Map by default.
The Ubuntu Software app allows easy switching between differentchannels for Snap apps.
TheTo Do app has been added to the default normal install.
spice-vdagent is pre-installed for better performance for Spice clients such as the GNOME Boxes app.
The right-click method for touchpads without physical buttons has changed to atwo-finger click instead of clicking in the bottom right of the touchpad. You can use the GNOME Tweaks app (not installed by default) to change this setting.
Although libinput is the default driver for mice and touchpads, it is now possible to use thesynaptics driver with the Settings app. Support for the synaptics driver will be dropped in a future Ubuntu release.
Computers willautomatically suspend after 20 minutes of inactivity while on battery power.
GNOME Shell now supportsThunderbolt 3.
32-bit installer images are no longer provided for Ubuntu Desktop.
The Ubuntu Desktop now usesGNOME instead of Unity.
GDM has replaced LightDM as the default display manager. The login screen now uses virtual terminal 1 instead of virtual terminal 7.
Window control buttons are back on theright.
Driverless printing support is now available.
GNOME's built-inscreen keyboard is used instead of Onboard.
Calendar has a Week View and supports recurring events.
System Log has been replaced byLogs, an app to view logs from the systemd journal.
Many GNOME apps now have aKeyboard Shortcuts popup available in the app menu.
gconf is no longer installed by default since it has long been superseded by gsettings. Note that statistics and preferences for the Aisleriot card games will be reset when upgrading from 16.04 LTS or 16.10. gconf will be removed from the Ubuntu package archives in a future Ubuntu release.
TheUbuntu GNOME flavor has been discontinued. If you are using Ubuntu GNOME, you will be upgraded to Ubuntu. Choose theUbuntu session from the cog on the login screen if you would like the default Ubuntu experience.
Installgnome-session then restart your computer and chooseGNOME (orGNOME on Wayland) from the cog on the login screen if you would like to try a more upstream version of GNOME. If you'd like to also install more core apps, install thevanilla-gnome-desktop metapackage.
Only "main" component enabled after install (1783129)
/etc/default/grub.d/50-curtin-settings.cfg overwrites GRUB_CMDLINE_LINUX_DEFAULT (1527664)
Install failed on disk previously used for ZFS (1782744)
The next generationSubiquity server installer, brings the comfortable live session and speedy install of Ubuntu Desktop to server users at last.
N.B., If you require multipath you will want to continue to use the alternate installer which can be downloaded fromhttp://cdimage.ubuntu.com/releases/18.04/release/
A new feature in the server installer in 18.04.3 is that it automatically checks for a new version of the installer snap on startup and offers to update to a new version if it is available.
Also new in 18.04.3 is support for encrypted LVM volume groups and reusing existing partitions, as well as LVM, RAID, vlans, and bonds which were added in 18.04.1.
There are some known limitations in the reuse of existing partitions:
Reusing a partition that was part of an LVM volume group or RAID can fail. This can be worked around by switching to another tty and destroying the RAID or VG by hand, then restarting. If there is no other data on the same drive that you want to keep, reformatting the drive entirely also works.
The installer cannot add or remove individual partitions. You can format (or not) and mount existing partition, but not add a partition to free space or remove a single partition from a drive.
We hope to fix both of these limitations via snap updates well before the next point release.
ifupdown has been deprecated in favor ofnetplan.io and is no longer present on new installs. Backend configuration on Ubuntu Server by default is provided bysystemd-networkd.
Please see theNetwork configuration section of these release notes.
LXD is the system container manager that ships with all Ubuntu servers.
Ubuntu 18.04 includes the all new LXD 3.0 release, some of the highlights include:
To learn more about LXD 3.0, read therelease announcement.
A new external tool calledlxd-p2c is also available to turn existing systems into LXD containers.
QEMU has been updated to the 2.11.1 release.
See theChangelog for major changes since Artful.
Among many other changes, fixes aroundMeltdown/Spectre are included. Since fully utilizing these mitigations needs more than just an upgrade, it is recommended to read details at theqemu.org blog post.
QEMU in Ubuntu 18.04 now has rdma support enabled as over the past year much unification in therdma-core project has occured.
Migrations from former versions are supported just as usual. When upgrading it is always recommended toupgrade the machine types allowing guests to fully benefit from all the improvements and fixes of the most recent version.
libvirt has been updated to version 4.0. See the upstreamChangelogs for details since version 3.6 that was inArtful.
The packaging now builds libvirt storage drivers as pluggable libraries. This slims down the installation requirements but some drivers of less general interest will now be found inuniverse. (ex: gluster, sheepdog, zfs). On the other hand that means that a few formerly integrated features like rbd or zfs now might require you to install the package after upgrade e.g. in this case libvirt-daemon-driver-storage-zfs.
Ubuntu includes 17.11.x the latest stable release branch ofDPDK.
See theRelease Notes for details.
By the newStable Release exception for DPDK future stable updates to 17.11.x will be made available to Ubuntu 18.04
Open vSwitch has been updated to 2.9.
Please read therelease notes for more detail.
In Ubuntu 18.04chrony will replacentpd as the recommended server for the NTP protocol. See theupstream changelog for an overview of recent changes as well as theFAQ which will help for smooth conversions from NTP.
Thecomparison among ntp servers by the chrony maintainers may interest some users looking to see a high level reason why this change was made. It does lack the rather new and not yet completely readyntpsec, but otherwise is a fair analysis.
For simple time sync needs the base system already comes withsystemd-timesyncd. Chrony is only needed to act as a time server or if you want the advertised more accurate and efficient syncing.
Going along with this change,ntpd has been demoted frommain to universe.ntpd will continue to work but will only receive best-effort security maintenance. When upgrading to Ubuntu 18.04 it is highly recommended to migrate tochrony if you had set upntpd before.
The version was updated to18.2. Notable new features include:
New cloud support: IBMCloud andHetznerCloud now have official datasources andOpenTelekom is now recognized by cloud-id
OpenNebula: Improve network configuration support.
The version was updated to18.1. Notable features include:
Add support for installing remote sources that are a filesystem image. (1746348)
Improved device teardown of dirty devices to support re-deployment (1750519) (1743643) (1713537) (1722322) (1708052) (1718699)
Default config now automatically tars curtin logs upon error using newcurtin collect-logs command.
storage: accept filesystem mount options (1709284)
The version was updated to2.4b2. Notable features include:
For more information, please visit theMAAS website or review the2.4 Release Notes.
SSSD was updated to version 1.16.x and its secrets service is now enabled. Previously it was disabled because it required the http-parser library which lived in Universe, but a successful MIR brought it to main so SSSD could link with it.
The defaults for autofs related configuration settings changed in SSSD 1.14.0 (seehttps://pagure.io/SSSD/sssd/issue/2858). If you are upgrading from SSSD 1.13 in Xenial, you might have to explicitly specify allldap_autofs_* settings in yoursssd.conf to match your data in LDAP.
These are the defaults, based on the setting ofldap_schema:
sssd.conf setting | xenial default | bionic default |
ldap_autofs_map_object_class | automountMap | nisMap (rfc2307, autofs_provider=ad), otherwise automountMap |
ldap_autofs_map_name | ou (rfc2307), automountMapName (rfc2307bis, ipa, ad) | nisMapName (rfc2307, autofs_provider=ad), otherwise automountMapName |
ldap_autofs_entry_object_class | automount | nisObject (rfc2307, autofs_provider=ad), otherwise automount |
ldap_autofs_entry_key | cn (rfc2307), automountKey (rfc2307bis, ipa, ad) | cn (rfc2307, autofs_provider=ad), otherwise automountKey |
ldap_autofs_entry_value | automountInformation | nisMapEntry (rfc2307, autofs_provider=ad), otherwise automountInformation |
Seebug #1767886 for details.
The vfs moduleaio_linux was removed from thesamba-vfs-modules package (seeDebian bug #881239), and it's nowadays alsono longer present in upstream Samba code. The upstreamSamba bug #13128 has more details.
If you had a configuration that included this module in a share, something like this:
[someshare] ... vfs objects = aio_linux
Then when this share is accessed, the server will notice it can't find theaio_linux module and fail. You should remove theaio_linux from the list of vfs objects that are being loaded.
Note thattestparm(1) won't catch this type of error (seebug #1778860).
nginx was updated to version 1.14.0. New features includethe mirror module,HTTP/2 push, and thegRPC proxy module.
PHP was updated to version 7.2.x. For upstream guidance on migrating from PHP 7.1 (Artful's version) to 7.2:http://php.net/manual/en/migration72.php. Also of relevance might be the 7.0 to 7.1 migration documentation:http://php.net/manual/en/migration71.php.
Apache was updated to version 2.4.29. Additionally, HTTP/2 support is now enabled in 18.04.
landscape-client has been ported to Python 3 and is now available to install on the default image.
Newenable-fips-updates command to enable a special FIPS repository with non-certified updates for FIPS enabled systems.
improvements for IBM z14,z14 ZR1,LinuxONE Rockhopper II and LinuxONE Emporer II (1725260) (1736100)
s390-tools major version upgrade to v2.3.0 (1735447)
cryptsetup rebase and enhancements in support of dm-crypt (1724592)
protected key support for dm-crypt (1741904)
DASD multi-queue (1732446) support and block layer discard support (1732440)
Improved memory handling (1734120)
support for new crypto hardware CEX6S (1735437)
AP bus kernel API for KVM (1732449)
CPACF enhancements and acceleration for AES GCM (1735438) (1743750)
HiperSocket connections enhacements (1735695)
parted update for fdasd/vtoc (1737144)
openssl-ibmca rebase (1747626)
opencryptoki rebase for EP11 and ECC enhancement (1751272)
lock optimization enhancement (1747877)
libica upgrade for z14, several bug fixes (1737159) and to use PRNO-TRNG to seed SHA512-DRBG (1754617)
auto detect layer2 setting in qeth driver (1747639)
Kernel support for STHYI/LPAR (1736093)
rebase libpfm4 for z13/z13s CPU-MF hardware counters (1741905)
Ubuntu 18.04 includes the latest OpenStack release, Queens, including the following components:
OpenStack Identity - Keystone
OpenStack Imaging - Glance
OpenStack Block Storage - Cinder
OpenStack Compute - Nova
OpenStack Networking - Neutron
OpenStack Telemetry - Ceilometer, Aodh, Gnocchi, and Panko
OpenStack Orchestration - Heat
OpenStack Dashboard - Horizon
OpenStack Object Storage - Swift
OpenStack Database as a Service - Trove
OpenStack DNS - Designate
OpenStack Bare-metal - Ironic
OpenStack Filesystem - Manila
OpenStack Key Manager - Barbican
Please refer to theOpenStack Queens release notes for full details of this release of OpenStack.
OpenStack Queens is also provided via theUbuntu Cloud Archive for OpenStack Queens for Ubuntu 16.04 LTS users.
WARNING: Upgrading an OpenStack deployment is a non-trivial process and care should be taken to plan and test upgrade procedures which will be specific to each OpenStack deployment.
Make sure you read theOpenStack Charm Release Notes for more information about how to deploy Ubuntu OpenStack using Juju.
Ubuntu supports 4k page size, 64K page size has benefits to certain applications and benchmarks. Please follow this link forARM64 performance considerations that may yield similar results with 4k page size.
As is to be expected, with any release, there are some significant known bugs that users may run into with this release of Ubuntu 18.04. The ones we know about at this point (and some of the workarounds), are documented here so you don't need to spend time reporting these bugs again:
The computer suspends after 20 minutes of inactivity on battery power even if a user is logged in remotely. (GNOME:gnome-control-center#22)
Some admin utilities will not work with GNOME on Wayland since the apps have not been adapted to usePolicyKit to only use admin privileges for the specific functions needed. Also, some screenshot and screencast apps and all remote desktop server apps do not currently work on GNOME on Wayland. As a workaround, you can use the default Ubuntu session.
Exiting the live session may get stuck with a "A start job is running for " error. You may need to forcefully power off the computer if you see this. (1706939)
The Dock and Appindicator system extensions appear to be Off in tools like GNOME Tweaks. (They are on but cannot be disabled because they are system extensions for the Ubuntu session.) (1718850)
Tracker is not installed by default. When installed, you must log out and log back in for the tracker service to start (1697769)
Systems may fail to boot when connected overDisplayPort to an external screen, on NVidia graphics hardware such as the GTX970 chipset. (1723619)
When an external monitor is connected to a laptop, the login screen is only displayed on the internal one and in some case is not visible (1723025)
The warning dialog when a user force a UEFI installation does not respond to input event and the installation is then blocked at this stage (1724482) Avoid yourself some troubles and do not force a UEFI installation without a UEFI partition, grub-installer will fail anyway.
Doing an "Entire disk" installation over an existing LVM installation will fail because the installer selects the wrong boot device (1724417) Use custom partitioning instead and manually select the right boot device in the combo box.
The Files appremains at 3.26.
Upgrading via the installer (Ubiquity) is deemed not safe due to bugs in apt-clone and so is no longer supported. (1756862) UIFE - remove ubiquity upgrade option.
Setting a ulimit may cause segfaults in certain applications, especially those using webkit2gtk. Disabling the ulimit should restore normal functionality. More information in this Debian news entry:https://salsa.debian.org/webkit-team/webkit/blob/wk2/unstable/debian/NEWS
The installer can crash, especially noticeable on HiDPI screens where scaling has been applied (1751252). The workaround is to boot into the live session, change Settings > Devices > Displays > Scale = 100%, click Apply and proceed with installation by clicking "Install Ubuntu 18.04 LTS".
The installer may not use the EFI partition you expect it to use (1396379). If you've experienced this, this bug comment has advice to repair the situation:https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1396379/comments/8
LVM Entire Disk option does not use entire disk (1785321)
Partitioning step allows to configure LVM across multiple devices without requiring to setup a separate /boot partition. This may lead to failure to install the bootloader at the end of the installation, and failures to boot the resultant installations. (1680101)
LVM configuration cannot be removed when volume groups with the same name are found during installation. Partitioner does not support installation when multiple conflicting/identical volume groups have been detected. For example reinstalling Ubuntu with LVM across multiple disk drives that had individual LVM installations of Ubuntu. As a workaround, please format disk drives prior to installation, or from the built in shell provided in the installer. (1679184)
cio_ignore blacklist is no longer active after installation, because not all install-time parameters, like cio_ignore (s390x), are propagated to the installed system. Workaround is to edit /etc/zipl.conf to apply these and re-run sudo zipl to update the IPL. (1571561)
Importing ssh keys fromGitHub or Launchpad during the installation with the newsubiquity server installer currently won't work. (#1766980)
As of 18.04.4, the Raspberry Pi 4B is supported. For users upgrading to the release, please ensure all packages including the kernel are up to date on a prior supported model (e.g. 3B, 3B+) before attempting to boot the card on a 4B. If you encounter problems, verify (by booting on the older model) that you are running kernel version 5.3 or above (withuname -r), and that no updates are pending.
TheWiFi firmware present for the BCM4345/6 chipset (found on the Raspberry Pi 3A+, 3B+, and 4B) in the 18.04.4 release is out of date and results in unreliable operation when used with 5Ghz802.11acWiFi. Note that most 5GhzWiFi routers at present are802.11n or a combination of 802.11n and 802.11ac, so the expected impact is low. However, the firmware package is in the process of being updated to fix this and will be updated in 18.04 as a priority after the release of 18.04.4. (1862760)
For Ubuntu Core 18 on the Raspberry Pi, thevc4-fkms-v3d overlay is included in the default boot configuration. This is known to cause issues on the Raspberry Pi 3A+ on which the overlay allocates half the available memory, leaving insufficient memory for the system to operate correctly (1848247). The recommended workaround is to comment out thedtoverlay line inconfig.txt on thesystem-boot partition (the first partition on the card), like so:
#dtoverlay=vc4-fkms-v3d
ThePimoroni Fan Shim for the Raspberry Pi 4 re-uses the serial console pins, pins 8 and 10 (GPIO14 and GPIO15 respectively), on the GPIO header to control its RGB LED. This results in "noise" on the serial line which stops u-boot during startup (as it thinks a key has been pressed). Adding the following line toconfig.txt on thesystem-boot partition (the first partition on the card) disables the serial console permitting the boot sequence to complete:
enable_uart=0
The release notes for the official flavors can be found at the following links:
Kubuntuhttps://wiki.ubuntu.com/BionicBeaver/ReleaseNotes/Kubuntu
Ubuntu Budgiehttps://ubuntubudgie.org/blog/2019/02/15/18-04-2-lts-ubuntu-budgie-released
Ubuntu Kylinhttps://wiki.ubuntu.com/BionicBeaver/ReleaseNotes/UbuntuKylin
Ubuntu MATEhttps://ubuntu-mate.org/blog/ubuntu-mate-bionic-final-release/
Ubuntu Studiohttps://wiki.ubuntu.com/BionicBeaver/ReleaseNotes/UbuntuStudio
Your comments, bug reports, patches and suggestions will help fix bugs and improve the quality of future releases. Pleasereport bugs using the tools provided.
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If you would like to help shape Ubuntu, take a look at the list of ways you can participate at
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BionicBeaver/ReleaseNotes (last edited 2023-06-01 08:57:42 byutkarsh)
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