Synaptics TouchPad on Panasonic CF-MX4

This wulf7 [1] is a really nice guy that helped me run full featured Synaptics TouchPad with FreeBSD on Panasonic Toughbook CF-MX4 [2][3]. Now it works for moused and libinput with all multitouch gestures like two or three finger scroll, scale, etc! The problem was in detection mechanism as device is connected over multiplexer with both PS/2 and SMBus but multitouch works only over SMBus. Although fix requires change and rebuild of FreeBSD Kernel I hope it gets quickly to the upstream [4]. I had a chance to exercise building whole FreeBSD distribution into the USB memstick image, so I could test driver fix on a target computer without even touching its hard drive contents :-)

/* psm has a special support for GenMouse + SynTouchpad combination */
if (active_ports_count >= 2) {
    for (port = 0; port < KBDC_AUX_MUX_NUM_PORTS; port++) {

That 2 above had to be changed into 1 in /usr/src/sys/dev/atkbdc/psm.c. Nice? That’s what I call a one-bit-fix :-)

In addition, when you work with Synaptics Touchpad in Xorg and you want to use its all features like tap-to-click, natural (swapped) two finger scroll, two and three finger gestures, don’t use moused,xmodmap, or xinput as this will produce inconsistent behavior in applications based on different toolkits (i.e. GTK will scroll up while Qt will scroll down etc), instead use the new way of input based on libinput and modify MatchIsTouchpad section of /usr/local/share/X11/xorg.conf.d/40-libinput.conf like:

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event5"
        Option "NaturalScrolling" "on"
        Option "Tapping" "on"
        Option "ClickMethod" "clickfinger"
        Driver "libinput"
EndSection

[1] https://github.com/wulf7/iichid
[2] https://github.com/wulf7/iichid/issues/51
[3] https://github.com/wulf7/iichid/issues/53
[4] https://reviews.freebsd.org/D28502

FreeBSD on a Hybrid Graphics Laptop

If you happen to get a nice laptop with a powerful graphics card, such as polish HYPERBOOK SL502VR [1], it is highly probable that you will use UEFI boot mode. In that case you need to use SCFB [2] driver instead of VESA. Use the xf86-video-scfb package to get Xorg running.

Hybrid Graphics at first used MUX device that did a LCD connect to a selected video card on boot. Nowadays both cards use common Video Framebuffer [3] to draw over a screen. The simple video card (Intel in my case) is always active, while the more powerful and power consuming video card is started on-demand (nVidia in my case). This however requires a dedicated DMA BUF implementation, which is not yet available on FreeBSD, so none of the cards can see any monitor connected, resulting in “No Screens Found Error” from Xorg.

I have already reported a bug/feature request to nVidia. Also developers of FreeBSD are working on the Hybrid Graphics implementation.

[1] http://sklep.hyperbook.pl/hyperbook-sl502-vr-p651rp6g-gtx-1060-p-25965.html
[2] https://wiki.freebsd.org/Graphics/SCFB
[3] https://en.wikipedia.org/wiki/Framebuffer