Per Felix Miata:
|Maybe if we saw your sources.list we might be able to suggest a reason. I just
|booted 14.04.5 (with DE KDE only) and updated sources. Subsequently, aptitude
|was unable to locate protonmail*.
# deb cdrom:[Kubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20120820.1)]/ dists/trusty/main/binary-i386/
# deb cdrom:[Kubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20120820.1)]/ dists/trusty/restricted/binary-i386/
# deb cdrom:[Kubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20120820.1)]/ trusty main restricted
# newer versions of the distribution.
## Major bug fix updates produced after the final release of the
## distribution.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
## Trinity Desktop Environment
## DVD styler
|Maybe what you need is to let go of 14.04. What does it have that you can't have
|from 16.04 LTS, Jessie or Stretch, from which you should expect less trouble
|with QT4 or QT5 issues?
when i upgraded from 12.04 LTS to 14.04, i asked here if there were a problem with 16.04 and was told that there was a problem with 16.04 and TDE. has this gotten better? i'd be very happy to make the upgrade!
|What source provides protonmail?
the protonmail service is from protonmail.com, and the protonmail bridge, which is what i'm trying to install, is an encryption/decryption application that allows protonmail to work with a normal mail client. while it has existed for windows and mac for some time, it is in beta for linux, and this is what i'm trying to install.
https://protonmail.com/support/knowledge-base/bridge-for-linux/
dep
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