Ubuntu 20.04 Focal Fossa LTS still only has darktable 2.6.3 in the official repositories.
darktable 3.0.0 was released Dec 24, 2019, and darktable 3.0.1 was released March 09 2020.
( darktable feature releases are traditionally released each Christmas. )
Please note that darktable 3.x is NOT backward compatible with darktable 2.6.3. So there is no way for a user of a more current version of darktable to even use darktable 2.6.3. A supplement problem is that running 2.6.3 when you have a 3.0.x db (eg. if upgrading Ubuntu to 20.04 in place) results in a totally silent fail at load. Only if run from a terminal do you see the '... db is too new ... Aborting ...' message.
I'll submit a post to <email address hidden> re this
Ubuntu 20.04 Focal Fossa LTS still only has darktable 2.6.3 in the official repositories.
darktable 3.0.0 was released Dec 24, 2019, and darktable 3.0.1 was released March 09 2020.
( darktable feature releases are traditionally released each Christmas. )
Please note that darktable 3.x is NOT backward compatible with darktable 2.6.3. So there is no way for a user of a more current version of darktable to even use darktable 2.6.3. A supplement problem is that running 2.6.3 when you have a 3.0.x db (eg. if upgrading Ubuntu to 20.04 in place) results in a totally silent fail at load. Only if run from a terminal do you see the '... db is too new ... Aborting ...' message.
I'll submit a post to <email address hidden> re this