Hi,
you get stuck because qgis 3.4.6 from qgis.org is built against GRASS
7.6.0 from the ubuntugis-unstable ppa, but that ppa has upgraded to
Grass 7.6.1 in the meantime.
This should be resolved by the next QGIS point release.
Alternatively, you can remove the qgis.org stuff from your sources list,
purge and autoremove the 3.4.4 packages, and install QGIS 3.4.6 from the
ubuntugis-unstable ppa only.
HTH,
Andre Joost
Am 23.04.19 um 05:13 schrieb Zhang Qun:
Hi
I know Ubuntu16.04 is a bit old for QGIS now but since our software is all
built on Ubuntu16.04 so I tried to install QGIS 3.x on it. Below is my
tries but with no luck. Any help?
*1. using https://qgis.org/ubuntugis <https://qgis.org/ubuntugis>
repository*
$ sudo apt install qgis python3-qgis qgis-plugin-grass
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package python3-qgis
$ sudo apt install qgis python-qgis qgis-plugin-grass
The following packages have unmet dependencies:
qgis-plugin-grass : Depends: +grass760 but it is not installable
E: Unable to correct problems, you have held broken packages.
*2. using http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu
<http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu>*
$ sudo apt install qgis python3-qgis qgis-plugin-grass
Setting up qgis-providers (3.4.6+dfsg-1~xenial1) ...
/usr/lib/qgis/crssync:
/usr/local/cuda-8.0/targets/x86_64-linux/lib/libOpenCL.so.1: no version
information available (required by /usr/lib/libqgis_core.so.3.4.6)
/usr/lib/qgis/crssync:
/usr/local/cuda-8.0/targets/x86_64-linux/lib/libOpenCL.so.1: no version
information available (required by /usr/lib/libqgis_core.so.3.4.6)
/usr/lib/qgis/crssync:
/usr/local/cuda-8.0/targets/x86_64-linux/lib/libOpenCL.so.1: no version
information available (required by /usr/lib/libqgis_core.so.3.4.6)
/usr/lib/qgis/crssync: relocation error: /usr/lib/libqgis_core.so.3.4.6:
symbol clCreateCommandQueueWithProperties, version OPENCL_2.0 not defined
in file libOpenCL.so.1 with link time reference
dpkg: error processing package qgis-providers (--configure):
subprocess installed post-installation script returned error exit status
127
$ sudo apt install qgis python-qgis qgis-plugin-grass
The following packages have unmet dependencies:
python-qgis : Depends: python-qgis-common (= 2.18.28+dfsg-1~xenial1) but
it is not going to be installed
E: Unable to correct problems, you have held broken packages.
Best regards,
Zhang Qun
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