Eu não posso acreditar que ninguém tenha mencionado isso, então eu vou. Eu tive exatamente o mesmo problema agora com Remmina.
O comando:
sudo apt-cache show remmina
dá
Package: remmina
Priority: optional
Section: gnome
Installed-Size: 362
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Luca Falavigna <[email protected]>
Architecture: amd64
**Version: 1.0.0-4ubuntu2**
Replaces: remmina-common (<= 1.0.0-1ubuntu8), remmina-gnome, remmina-xfce
Depends: libappindicator3-1 (>= 0.4.90), libc6 (>= 2.15), libgcrypt11 (>= 1.4.5), libgdk-pixbuf2.0-0 (>= 2.22.0), libglib2.0-0 (>= 2.35.9), libgtk-3-0 (>= 3.0.0), libssh-4 (>= 0.3.91), libvte-2.90-9 (>= 1:0.27.2), libx11-6, remmina-common (= 1.0.0-4ubuntu2), dbus-x11
Recommends: remmina-plugin-rdp, remmina-plugin-vnc
Breaks: remmina-common (<= 1.0.0-1ubuntu8), remmina-plugin-data (<= 0.9)
Filename: pool/main/r/remmina/remmina_1.0.0-4ubuntu2_amd64.deb
Size: 132012
MD5sum: ca69666bd3ccbdf97f542a2b28c823c6
SHA1: 86f26b764ef4d24c378629b42a30cba2511e75f9
SHA256: 6a58cf5f5a8c53a5285108c4aa07dcc10f31abeaef21cf8c9bc63e2997004d14
Description-en: remote desktop client for GNOME desktop environment
Remmina is a remote desktop connection client able to display and control a
remote desktop session.
.
It supports multiple network protocols in an integrated and consistant user
interface. Currently RDP, VNC, NX, XDMCP and SSH protocols are supported.
Homepage: http://remmina.sourceforge.net/
Description-md5: ede6e83246f1eea7dfe2191738034796
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 9m
Task: ubuntu-desktop, ubuntu-usb, edubuntu-desktop, edubuntu-usb
O que de fato mostra que a versão instalada é = > 1.0
apt-cache é uma pequena joia de um comando:
sudo apt-cache search remmina
Fornecerá todos os pacotes nos repositórios aos quais você está inscrito que contêm o termo remmina:
remmina - remote desktop client for GNOME desktop environment
remmina-common - common files for remmina remote desktop client
remmina-plugin-rdp - RDP plugin for remmina remote desktop client
remmina-plugin-vnc - VNC plugin for remmina remote desktop client
remmina-plugin-gnome - GNOME plugin for remmina remote desktop client
remmina-plugin-nx - NX plugin for remmina remote desktop client
remmina-plugin-telepathy - Telepathy plugin for remmina remote desktop client
remmina-plugin-xdmcp - XDMCP plugin for remmina remote desktop client
O comando show fornecerá detalhes exatos para qualquer pacote em particular. Muito útil.