This post serves mostly as a note to myself in case I need to reinstall FreeBSD on my Zenbook. Hopefully it can be of help to someone else on how to get FreeBSD working on their Asus Zenbook UX32VD. Some settings here are based on my own preference, such as keyboard layout and so on.

Graphics / video

The Zenbook has two graphics card, the integrated Intel card and a discrete nVidida GeForce 620M.

The discrete graphics card

I don’t use the discrete graphics card, and since FreeBSD dosen’t support Optimus, I shut it down to save battery power. This gives me roughly double the battery power.

The acpi_call program is needed and installed with pkg install acpi_call. Then we need a small script to shut down the GPU. The script is called Fetch it with fetch

Make it executable and place it in /etc/rc.local. If no /etc/rc.local exist, create it and make it executable.

Also make sure to put this line in /boot/loader.conf:


The Intel graphics card

The Intel card “just works”, after installing the xf86-video-intel package for Xorg. Install it with pkg install xf86-video-intel.

To get a higher resolution in the console, and enable some power savings, place these two lines in /boot/loader.conf:


Screen & keyboard backlight

Start with adding these lines to /boot/loader.conf:


Reboot your machine and the keyboard backlight should be adjustable with the keys Fn+F3 and Fn+F4. The keys to adjust the screen backlight dosen’t work however, but there is a small program for this, called intel_backlight at Github.

Download it (Clone or download zip-file) and run the following commands as root.

cd intel_backlight_fbsd
make install

A setuid’d program called intel_backlight is now installed and can be executed as a regular user to adjust the screen backlight with intel_backlight 35 to set the screen brightness to 35%. To always start at 35% I placed this in /etc/rc.local:

/usr/local/bin/intel_backlight 35

Getting two-finger scroll to work

As of FreeBSD 11.1-RELEASE there is support for the Elantech touchpad which is the touchpad that’s in the Zenbook. Add this line to /boot/loader.conf:


I noticed that you’ll also need to run the moused daemon to get the touchpad to work correctly so add this line to /etc/rc.conf:


Now you can reboot once again and two-finger scrolling among other things should now be working correctly.

More power savings

Add the following two lines to /etc/rc.conf to active powerd daemon and to enable power saving features on the Intel WLAN card. Note: change or skip the WLAN country settings to your own preference. The important keyword for create_args_wlan0 is powersave. This saves about 2W on my computer.

create_args_wlan0="country SE regdomain ETSI powersave"

All in all FreeBSD gives me about an extra hour of battery power compared to Debian Linux.

Suspend / resume

Suspend and resume works out of the box on my Zenbook, even with the Zz button (Fn+F1). If you want to suspend your laptop when you close the lid, you need to add the following to /etc/rc.conf:

hw.acpi.lid_switch_state: S3

I personally don’t use this, since I like to be able to close the lid without interupting the network and my VPN-tunnels.

Issues with suspend / resume

Even though suspend/resume works out of the box (FreeBSD 11.1), there is an issue I haven’t yet been able to resolve. Once I have resumed my laptop, the power consumption goes up about 5W, which is much. At first I thought it was the discrete graphics card that woke up, so I’ve tried running again and again, but to no avail.

Update 2017-08-04

The problem described above was in fact caused by the discrete graphics card waking up after a resume. But to be able to turn it off again I first had to turn it on and then off again with acpi_call. I also noticed another problem; after a resume the display brightness went up to 100%. This was fixed along with the above problem.

If you have already run take a look at the saved method in .gpu_method. The file most likely resides in either /root or / dependning on whatever you have run it interactive as root or from /etc/rc.local. Copy the method from that file, which is everything after the equal sign. Then in /etc/rc.resume add these lines just before the exit 0.

sleep 4
/usr/local/bin/intel_backlight 35
/usr/local/sbin/acpi_call -p "\_SB.PCI0.PEG0.PEGP._ON" -o i
sleep 2
/usr/local/sbin/acpi_call -p "\_SB.PCI0.PEG0.PEGP._OFF" -o i

The first sleep is so that all devices has a chance to turn on. Then I lower the screen backlight to 35. The last three lines are to turn turn off the discrete graphics card (on and then off again).

Summary of all my config files




ifconfig_wlan0="WPA DHCP"
ifconfig_wlan0_ipv6="inet6 accept_rtadv"
create_args_wlan0="country SE regdomain ETSI powersave"
ifconfig_ue0_ipv6="inet6 accept_rtadv"


/usr/local/bin/intel_backlight 35


# At the end of the file (leave original content as is)

sleep 4
/usr/local/bin/intel_backlight 35
/usr/local/sbin/acpi_call -p "\_SB.PCI0.PEG0.PEGP._ON" -o i
sleep 2
/usr/local/sbin/acpi_call -p "\_SB.PCI0.PEG0.PEGP._OFF" -o i

exit 0

For swedish users

I live in Sweden and use UTF-8 as the default charset. In my /etc/login.conf I have added these two lines at the bottom of the default class:


You need to run cap_mkdb /etc/login.conf for these changes to have any effect, and either do a reboot and logout/login.

I use the Mate desktop and start X from the console with startx. This is what’s in my .xinitrc to set my keyboard layout to swedish and start Mate:

setxkbmap se &


I am really happy with this setup, and I hope this can help someone else to get FreeBSD running on their own Zenbook.

Update 2017-08-15

I’ve just ordered a new battery for my Asus Zenbook, since my old one had degraded to about 65% capacity. My new battery has a 99.9% capacity which is really good for a replacement battery!

With FreeBSD, the power saving options and my new battery, I get a whopping 6:43 hours of battery time! That’s the longest battery time I’ve ever had on my Zenbook. With Debian Linux, when my laptop was brand new, I got about 4:45 hours of battery life. Almost two hours longer on FreeBSD!

jake@elektra:~$ acpiconf -i0
Design capacity:       48248 mWh
Last full capacity:    48181 mWh
Technology:            secondary (rechargeable)
Design voltage:        7400 mV
Capacity (warn):       4824 mWh
Capacity (low):        481 mWh
Low/warn granularity:  481 mWh
Warn/full granularity: 481 mWh
Model number:          UX32-65
Serial number:		 
Type:                  LIon
OEM info:              ASUSTeK
State:                 discharging
Remaining capacity:    100%
Remaining time:        6:43
Present rate:          7170 mW
Present voltage:       7400 mV