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I am trying to install vulkan from
https://launchpad.net/%7Ecanonical-x/+archive/ubuntu/vulkan

Everything works fine until entering this line:

sudo apt install vulkan-utils mesa-vulkan-drivers

cannot find vulkan-utils

cannot find mesa-vulkan-drivers

I am using Xubuntu 14.04 with Intel 3rd gen, does anyone know what's going wrong??

Unfortunately it looks as if this PPA does not have much joy for Trusty Tahr:

This ppa contains bits and pieces needed to test Vulkan BUT ONLY FOR XENIAL

(and maybe 14.04 in the future).

If you filter for Trusty Tahr only you will see that all that is there for Trusty is the 355 and 364 NVidia drivers.

Please try it to install first by typing:

sudo apt-add-repository ppa:canonical-x/vulkan

sudo apt update

sudo apt install vulkan-utils mesa-vulkan-drivers

OutPut:

$ sudo apt install vulkan-utils mesa-vulkan-drivers

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following packages were automatically installed and are no longer    required:

checkbox-ng gstreamer1.0-clutter iproute libarmadillo5 libarmadillo6 libarpack2

libatk-wrapper-java libatk-wrapper-java-jni libbind9-90 libblas-common libblas3

libcamel-1.2-52 libck-connector0 libcolamd2.8.0 libdap17v5 libdapclient6v5

libdbd-mysql-perl libdbi-perl libdns100 libebook-contacts-1.2-1 libecal-1.2-18

libedata-cal-1.2-27 libedataserver-1.2-20 libepsilon1 libfreexl1 libgdal1i

libglew1.10 libglewmx1.10 libgnutls-deb0-28:i386 libgtop2-10 libimobiledevice4

libisc95 libisccc90 libisccfg90 libisl13 libkmlbase1 libkmldom1 libkmlengine1

liblapack3 libllvm3.6v5 libllvm3.6v5:i386 liblouis2 liblwgeom-2.1.8 liblwres90

libminizip1 libmysqlclient18:i386 libmysqlclient20 libmysqlcppconn7v5

libnetcdf11 libnl-route-3-200 libntdb1 libogdi3.2 libopenjp2-7 libpoppler52

libproj9 libpth20 libqpdf13v5 libraw10 libsctp1 libspatialite7 libsuperlu4

libterm-readkey-perl liburiparser1 libusbmuxd2 libvpx2 libvsqlitepp3v5

linux-headers-4.2.0-16 linux-headers-4.2.0-16-generic linux-headers-4.2.0-36

linux-headers-4.2.0-36-generic linux-image-4.2.0-16-generic

linux-image-4.2.0-36-generic linux-image-extra-4.2.0-16-generic

linux-image-extra-4.2.0-36-generic lksctp-tools mysql-utilities

mysql-workbench-data proj-bin proj-data python-cffi python-characteristic

python-dbus-dev python-mysql.connector python-ntdb python-pexpect python-ply

python-ptyprocess python-pycparser python-pyodbc python-pysqlite2 python3-cffi

python3-checkbox-ng python3-ply python3-pycparser qml-module-qtquick-dialogs

qml-module-qtquick-localstorage qml-module-qtquick-privatewidgets

qtdeclarative5-localstorage-plugin qtdeclarative5-qtfeedback-plugin

qtdeclarative5-ubuntu-web-plugin telepathy-indicator unity-scope-audacious

unity-scope-clementine unity-scope-gmusicbrowser unity-scope-gourmet

unity-scope-guayadeque unity-scope-musique

Use 'sudo apt autoremove' to remove them.

The following additional packages will be installed:

libvulkan1



The following NEW packages will be installed:

libvulkan1 mesa-vulkan-drivers vulkan-utils

0 upgraded, 3 newly installed, 0 to remove and 33 not upgraded.

Need to get 2,988 kB of archives.

After this operation, 15.6 MB of additional disk space will be used.

Do you want to continue? [Y/n]

it worked for me @ "Ubuntu 16.04" !