ASUS Zenbook UX31E

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This page contains instructions, tips, pointers, and links for installing and configuring Arch Linux on the ASUS Zenbook UX31E Ultrabook. (There is probably little/no difference with his 11" little brother, the UX21E)

Installation issues

If you get an error trying to format partitions when installing Arch try adding this line to the kernel parameters


UEFI Booting

As of 21-Feb-2012 Grub2 seems to disagree with Asus UEFI, halting at "Loading inital ramdisk", use BIOS instead.


For best user experience, use the latest mainline kernel (linux-mainlineAUR).

The following article refers to at least kernel 3.2.rc6

Touch Pad

There are different versions of the UX31, some have Sentelic and some have Elenatec - Touch pads.

Elenatec Touch pads

Touch & Scroll works out of the box. Clickpad functionality does not. (However, using two and three finger touches for right an middle click works fine).

If higher pressure must be applied to your touchpad in order to function properly, tweak the following properties according to your needs [1]

synclient FingerLow=5
synclient FingerHigh=15

Alternatively, edit your /etc/X11/xorg.conf.d/10-synaptics.conf

Section "InputClass"
       Identifier "touchpad catchall"
       Driver "synaptics"
       MatchIsTouchpad "on"
       MatchDevicePath "/dev/input/event*"
       Option "TapButton1" "1"
       Option "TapButton2" "3"
       Option "TapButton3" "2"
       Option "VertTwoFingerScroll" "1"
       Option "HorizTwoFingerScroll" "1"
       Option "FingerLow" "5"
       Option "FingerHigh" "15"

Tip : Multifinger taps; two finger for middle click, three fingers for right click.

Sentelic Touchpads

Note: The Sentelic Touchpad drivers have been added to the 3.2 kernel, so it should work out of the box by now.

Some kind of driver seems to be available here. In fact, ReubenBond has made contact with a sentelic representative who has provided him with official documentation on putting the device into absolute positioning mode. The latter can be accessed here:

This looks very promising and ReubenBond is committed to developing a driver in the next few weeks. This is all referenced in the forum

Another even more advanced progress on driver is available here:

Please document any findings here.


Works out of the box


Works fine with the ath9k driver, included in the kernel since 2.6.27. Edit rc.conf as root and add ath9k to the MODULES array.

Warning: Do not forget to install the wireless_tools and wpa_suppliant packages during the installation since you will get stuck with no internet access if you don't!

Unstable Wireless when using Network Manager

Some users experience connection drops when using wireless. For some users this can be fixed by setting the wireless connection's BSSID (usually the router's MAC address). This only works if your wireless connection only has one access point as the BSSID is unique for each access point.

Ethernet - USB adapter

Note: The Asix USB ethernet drivers are included in the current (3.2.2-1) kernel, so it should work out of the box now

The Ethernet USB adapater which comes with the ASUS UX31 and UX21 models is the Asix "USB to Fast Ethernet" adapter, model AX88772B. At the present, the device is not recognized by the currently available kernels. However, the source for the driver for Linux Kernels 2.6.38 and later can be downloaded at the following link: AX88772B Linux Driver v4.2.0:

Once downloaded, the source needs to be compiled. First unzip the file as follows:


Next, go into the unzipped directory and compile the source as follows:

cd AX88772B_772A_760_772_178_LINUX_Driver_v4.1.0_Source

Install the just compiled module:

sudo make install

Finally load the module:

sudo modprobe asix

That's it. You should be able to connect using a wired connection now.

Solid State Drive

Check Solid_State_Drives

Power Management

Suspend to RAM

The USB modules must be unloaded or the laptop won't come out of sleep mode.


SUSPEND_MODULES="xhci_hcd ehci_hcd uhci_hcd"



The USB 3.0 module needs to be unloaded before suspending and X needs to disable/enable DPMS to get the screen back on on resume.

This can be done by creating a script in /etc/pm/sleep.d/ Pm-utils#Advanced_Configuration

This works with kernel >= 3.1.8-1 :

EHCI_BUSES="0000:00:1a.0 0000:00:1d.0"
case "${1}" in
       # Disable touch-to-tap on Zenbook Sentelic touchpad
       # I don't know if this is needed
       echo -n 0x90 0x80 > /sys/devices/platform/i8042/serio4/setreg
       echo -n c > /sys/devices/platform/i8042/serio4/flags
       # Hacky workaround to fix display after suspend
       export DISPLAY=":0"
       export XAUTHORITY="/home/YOURUSER/.Xauthority"
       xset dpms force off
       xset dpms force on

Don't forget to make the script executable :

# chmod +x /etc/pm/sleep.d/95usbscreen


Do not add the following option to the kernel line



dmesg | grep -i "acpi fadt"


ACPI FADT declares the system doesn't support PCIe ASPM, so disable it.


Enabling i915_enable_rc6 will improve battery perfomance significatively but might also cause sudden shutdowns. To enable it, add the following option to your kernel line.


To check the current state of all i915 parameters execute as root (bash)

for i in /sys/module/i915/parameters/*;do echo ${i}=`cat $i`;done

Module parameter details

modinfo i915

For sudden shutdowns you can try fixing DSDT part of ACPI.

Additional powersavings

Configure Laptop_Mode_Tools and don't forget to check CPU_Frequency_Scaling

Additional ressources