http://lists.altlinux.org/pipermail/community/2008-November/643981.html и далее:

--------------------------------------------
$ apt-get install qsynaptics
Reading Package Lists... Done
Building Dependency Tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  qsynaptics: PreDepends: synaptics
E: Broken packages
---------------------------------------------
$ apt-get install synaptics
Reading Package Lists... Done
Building Dependency Tree... Done
Selecting xorg-x11-drv-synaptics for 'synaptics'
The following packages will be REMOVED:
  xorg-drv-synaptics
The following NEW packages will be installed:
  xorg-x11-drv-synaptics
0 upgraded, 1 newly installed, 1 removed and 0 not upgraded.
Need to get 55.1kB of archives.
After unpacking 33.1kB of additional disk space will be used.
...
---------------------------------------
> Скажите, чем отличаются друг от друга  xorg-drv-synaptics и
> xorg-x11-drv-synaptics? Мне кажется, что последний -- просто старая
> версия.
Если верить sisyphus.ru, xorg-drv-synaptics собирается из иксов, а
xorg-x11-drv-synaptics - из пакета synaptics (и у него меньше версия и в
сизифе его нет). Багу на qsynaptics, чтоб не просил, видимо. А то и на
xorg-x11-drv-synaptics, чтоб убрали.