synaptic не показывает подробное описание пакетов

Вместо этого используйте драйвер scfb.

Как в/usr/local/etc/X11/xorg.conf.d/xorg.conf:

Section "Device"
    Driver      "scfb"
EndSection

Изhttps://wiki.freebsd.org/Graphics/SCFB

If an accelerated graphics driver is not available for your FreeBSD system, an alternative is to use the scfb driver. At the time of writing, this is a common option for laptops with Broadwell or Skylake chipsets from Intel with integrated graphics, until the Intel DRM driver is updated to include support. Whilst the scfb driver does not provide accelerated graphics, and is missing some features like brightness adjustment and support for external displays, it works fine on built-in laptop displays for simple desktop use and even playing videos.

The system must be using the new vt(4) (aka Newcons) console for the scfb driver to work. This is the default if the system was booted with UEFI, but not if it was booted using (legacy) BIOS mode. Some laptops must be booted using UEFI mode for the scfb driver to work (booting in legacy BIOS mode but with that sysctl manually set to use vt(4) may not work).