The Asus Zenbook UX31E/UX21E works well with Ubuntu 12.04 LTS and 11.10, but does need some post installation configuration. 12.04 LTS will need less of configuration as many issues have already been solved there, so it's recommended to install a beta of 12.04 LTS rather than 11.10.

You can check what is your model with the command:

sudo dmidecode -s system-product-name

For further discusion and to seek help, see Ubuntu and the Asus Zenbook thread in the Ubuntu Forums.

Asus Zenbook and Ubuntu 12.04 LTS

This page aims to describe the steps needed to fully enable all features of the Asus Zenbook.

Overview

Anything not mentioned here should work out of the box.

(works out-of-the-box) (works, with remarks) (needs manual work) (won't currently work (completely)) (not yet documented)

BIOS Update

You can download the newest BIOS here:

UX21E: http://support.asus.com/download/download_item_mkt.aspx?model=UX21E

UX31E: http://support.asus.com/download/download_item_mkt.aspx?model=UX31E

You can update the BIOS from the BIOS menu itself, without any additional utilities.

Copy the BIOS file onto a memory-stick. Reboot and press the esc button to enter the BIOS menu. Then select "Enter Setup". From the Advanced tab, choose the Easy Flash option and then select the BIOS file to update.

Basic Installation Instructions

LCD Panel

Current Xorg-server overwrites, by default, display dpi setting to 96dpi. UX31E have ~138dpi. It make font and every thing looks really small. You can try use this option to overwrite defaults.

xrandr --dpi 138/eDP1

Also this two bug reports should get more attention: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/589485 https://bugs.freedesktop.org/show_bug.cgi?id=41115

Suspend, Hibernate, Shut-down and Reboot

The kernel USB 3.0 (and sometimes 2.0) modules needs to be unloaded before suspending, and in kernels prior to 3.1 X also needs to disable/enable DPMS to get the screen back on resume. Save the following script as /etc/pm/sleep.d/20_zenbook (and make it executable):

For kernel 3.1 or newer (Ubuntu 12.04 LTS):

EHCI_BUSES="0000:00:1a.0 0000:00:1d.0"
case "${1}" in
    hibernate|suspend)
        # Switch USB buses off
        for bus in $EHCI_BUSES; do
            echo -n $bus > /sys/bus/pci/drivers/ehci_hcd/unbind
        done
        ;;
    resume|thaw)
        # Switch USB buses back on
        for bus in $EHCI_BUSES; do
            echo -n $bus > /sys/bus/pci/drivers/ehci_hcd/bind
        done
        ;;
esac

Keyboard functions (Brightness,volume,...)

Works fine out of the box.

Extra information for tweaking below.

Toggle internal/external screen: ?

Volume up, down, mute: Works.

Brightness up, down: Works.

Switch screen on/off: Works.

Sleep: Works.

Switch Network connection on/off: Works.

Context menu key: Works.

Fn + C (Launch1): Works, but not bound by default.

Fn + Space (Launch6): Works, but not bound by default.

Fn + V (Web Cam): Works, but not bound by default.

Example binding:

sudo apt-get install cheese
gconftool-2 -s /desktop/gnome/keybindings/custom0/name -t string 'Web Cam'
gconftool-2 -s /desktop/gnome/keybindings/custom0/binding -t string 'XF86WebCam'
gconftool-2 -s /desktop/gnome/keybindings/custom0/action -t string 'cheese'

Touchpad

Summary

Works fine out of the box.

Use System Settings -> Mouse and Touchpad to change several settings including enabling two finger scrolling.

Extra tweaking

This section is only for advanced users and requires usage of command line.

The Zenbook comes with one of two types of touchpads: Sentelic or Elantech. To determine which touchpad you have use this command:

cat /proc/bus/input/devices | grep -i pad

Sentelic Touchpad

Works out of the box. Currently multi-touch doesn't work, but see Bugs & Issues below for current status. To disable tap-to-click on boot, add the following to /etc/rc.local (and to the resume section of the suspend/resume script above, if necessary):

        echo -n 0x90 0x80 > /sys/devices/platform/i8042/serio4/setreg
        echo -n c > /sys/devices/platform/i8042/serio4/flags

Elantech Touchpad

Works out of the box. Multi-touch works in Ubuntu 12.04 LTS (kernel 3.2). Changes made in 3.2 were that the whole pad is the left button, there is thus no right button*. Click and drag is done by clicking anywhere on the pad and moving the finger. Right mouse is available as two-finger tap. Middle button is available as three finger tap.

* A revision to the synaptics driver restores click-pad functionality. See here for the Ubuntu package and instructions.

With the 3.2 kernel, there is a very simple solution to the very low sensitivity problem. You can just use synclient to setup the sensitivity you want (and many other things).

Here is an example script from Aurélien Jacobs and Marcus Möller. You can save it e.g. as ~/bin/touchpad_settings and add it as Unity startup script using gnome-session-properties.

# higher sensitivity
synclient FingerLow=9 FingerHigh=12

# faster speed and acceleration
synclient MinSpeed=1.5 MaxSpeed=3.5 AccelFactor=0.1

# 2 fingers scroll (can be also enabled in System Settings)
synclient VertTwoFingerScroll=1 HorizTwoFingerScroll=1

# faster coasting
synclient CoastingSpeed=10

# enable tap to click (2 fingers for middle click, 3 fingers for right click)
synclient TapButton1=1 TapButton2=3 TapButton3=2

# continue dragging movement when reaching the edge of the touchpad
synclient EdgeMotionMinZ=30 EdgeMotionMaxZ=40 EdgeMotionMinSpeed=100 EdgeMotionMaxSpeed=400

Alternatively

Only the first line is required to increase sensitivity. Other lines make the touchpad much more useful, but may not fit your needs. It is highly recommend to spend some time playing with synclient to find a setup that you really like (see 'man synaptics').

For kernel 3.3-rc5 on Ubuntu 12.04 LTS is Elantech drivers is working very good.

Wireless

Many users report that this works out of the box. Seems to work flawlessly, several megabytes per second.

USB Ethernet

Works out of the box. (kernel 3.2-rc7 and later, commit)

Bluetooth

Works out-of-the-box in Ubuntu 12.04 LTS.

Sound

Works perfectly out of the box, both internal and through HDMI.

Microphone

Internal mic

Works perfectly out of the box.

External mic

By default, the headphone/microphone combo jack (TRRS) does not switch automatically to the external microphone when one is plugged in. Bug report here

To resolve this, add the following line to /etc/modprobe.d/alsa-base.conf

options snd-hda-intel model=laptop-dmic

(Note that if you already have a line starting with "options snd-hda-intel" then you should modify it to include the extra option.)

External Monitor

HDMI

HDMI works out of the box (with audio). If you wish to use the laptop display at the same time as an external display, you must plug in the HDMI cable after X has started (also after resuming from suspend).

VGA

VGA works out of the box. But the internal screen has only one resolution setting (1600x900). This can be changed for the current session using e.g.

xrandr --newmode "1280x900_60.00"   95.00  1280 1360 1488 1696  900 903 913 934 -hsync +vsync
xrandr --addmode eDP1 1280x900_60.00

xrandr --newmode "1024x768_60.00"   63.50  1024 1072 1176 1328  768 771 775 798 -hsync +vsync
xrandr --addmode eDP1 1024x768_60.00

xrandr --newmode "1024x576_60.00"   46.50  1024 1064 1160 1296  576 579 584 599 -hsync +vsync
xrandr --addmode eDP1 1024x576_60.00

xrandr --newmode "800x600_60.00"   38.25  800 832 912 1024  600 603 607 624 -hsync +vsync
xrandr --addmode eDP1 800x600_60.00

You can copy these commands into a file, make it executable, and run it when you need to connect an external monitor:

#In your home dir:
nano xprofile
#Copy the commands into the file (shift+ctrl+V), and save (Ctrl+X)
chmod 0766 xprofile
./xprofile

This could be automated even more by producing an xorg.conf-file.

Note that if you want to use the internal and external screen at the same time the same rule applies as for the HDMI slot: plug in after system booted up. In case the user is "ready" pressing Fn+F8 before GRUB appears should solve the dual screen problem as well (according to reports on Ubuntu and the Asus Zenbook thread).

Ref.: https://wiki.ubuntu.com/X/Config/Resolution

SD card slot

Works perfectly out of the box.

Fan Control

Works perfectly out of the box.

Sensors (temps & fans)

Works by default however to (optionally) read the sensor data requires the package lm-sensors which is installed by:

sudo aptitude install lm-sensors
sudo tee -a /etc/modules <<-EOF
        coretemp
EOF

Power Saving Optimizations

Power saving on Asus Zenbook is pretty good out-of-the-box on Ubuntu 12.04 LTS, although not as perfect as it could be if Asus was shipping/certifying Ubuntu itself. This section gives a couple of hints to perfect it.

The biggest improvement - the Intel graphics RC6 power saving - is enabled by default in Ubuntu 12.04 LTS and is not needed to be specified separately anymore like in earlier Ubuntus. Likewise, Frame Buffer Compression is enabled by default in 12.04 LTS.

After enabling also the optimizations below, one should get circa 5W idle power usage with screen on but brightness to minimum, with WLAN connected.

Kernel parameters to use

Enabling ASPM saves a meaningful amount of power when idle according to powerstat. It's recommended. The pcie_aspm=force parameter is however required on Zenbook because the Zenbook BIOS gives Ubuntu wrong information. Therefore, add the following to the file /etc/default/grub, after the text quiet splash but within the same quotes:

pcie_aspm=force

There are a couple of optional kernel parameters which save some power and have not shown any problems with Zenbook, but are not enabled by default. Instead of the above, you may also use the following:

pcie_aspm=force drm.vblankoffdelay=1 i915.semaphores=1

ALPM

Enabling ALPM may save a meaningful amount of power when idle according to powerstat.

Read more and also the warnings on page ALPM. So far it has worked without problems for people, for example the Zenbook users, but has not been enabled by default in Ubuntu yet.

Bugs and issues

Not yet solved

USB 3 / XHCI runtime PM disables port

In "auto" suspend setting for the Fresco controller causes the USB3-port on the right to disable, although cellphones etc still can be charged with it.

Status: Awaiting kernel developer feedback. [add link!]

USB 2 / EHCI module needs to be unbound on suspend

The module needs to be unbound or the machine won't suspend, bound on resume.

Status: Awaiting kernel developer feedback.

https://bugzilla.kernel.org/show_bug.cgi?id=42728 https://bugs.launchpad.net/linux/+bug/962798

Improved support for Sentelic touchpad synaptics/multitouch

Reuben Bond has begun work on a synaptics driver for the Sentelic touchpad on https://github.com/ReubenBond/sentelic-multitouch but is awaiting further documentation from Sentelic regarding the multi touch.

Also, Oskari Saarenmaa has managed to get two finger scrolling working in his git repo at https://github.com/saaros/sentelic/, which Chris D aims to refine further in his fork at https://github.com/thaelim/sentelic.

Status: Work in progress.

Machine won't boot with UEFI

As of 21-Feb-2012 Grub2 seems to have problems booting Asus machines using UEFI, so use BIOS.

Solved

VT-d setting in BIOS (Solved)

Earlier VT-d feature was recommended to be disabled in Zenbook BIOS. To disable VT-d, reboot your Zenbook, holding down the Esc-button while it starts up. Locate the VT-d setting in the BIOS menus and toggle it to disabled.

Nowadays with the shipping kernel in Ubuntu 12.04 LTS, VT-d has not shown problems, even if i915.semaphores is used.

pcie_aspm=force doesn't work (Solved)

Bug report at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/962038

Machine check events (MCE) errors reported in kernel log

power limit notification MCE errors have been confirmed to be harmless (see here

Status: Specific issue noted above may be safely ignored.

Intel RC6 causes sudden shutdowns (Solved)

Kernel developers are aware and working on an issue with DMAR+RC6.

However, Zenbboks experience sudden shutdowns with RC6 on and Intel IOMMU off.

The most stable configuration is to enable semaphores and turn off VTd in BIOS, see above.

However, this needs to be properly fixed in the kernel once RC6 gets enabled by default.

Status: Solved in kernels 3.3-rc6 or newer, and Ubuntu 12.04 LTS.

Kernel 3.2 KMS (Solved)

Commit dc22ee6fc18ce0f15424e753e8473c306ece95c1 in 3.2-rc1 causes the KMS to fail on the Zenbook graphics. 3.2-rc1 to 3.2-rc5 will therefore not boot without supplying kernel parameter i915.modeset=0, in which mode hardware acceleration is disabled.

Status: Solved in 3.2-rc6 with commit ed4a51842a9d9e618d4f4c31349b15b974dba5df

EHCI power savings preventing shutdown (Solved)

Status: Solved in kernels 3.0.11, 3.1.3 or newer.

Appendix: Older information

The following parts are kept for historical reasons.

• New Zenbook users should install Ubuntu 12.04 LTS, even Beta. Ubuntu 11.10 users may find information still below.
• Power saving scripts should be near optimal in 12.04 LTS without changes, and the other power optimization topics above are much more relevant for saving power.
• With the Bluetooth fix in the kernel, most users shouldn't have a need to compile their own anymore, although of course that always can be done if wanted.

Ubuntu 11.10

This section includes special instructions for Ubuntu 11.10 that are not anymore needed in Ubuntu 12.04 LTS. If some section is not included here at all, the situation in 11.10 was similar to 12.04 LTS ie. most things work out of the box.

Suspend, Hibernate, Shut-down and Reboot

The kernel USB 3.0 (and sometimes 2.0) modules needs to be unloaded before suspending, and in kernels prior to 3.1 X also needs to disable/enable DPMS to get the screen back on resume. Save the following script as /etc/pm/sleep.d/20_zenbook (and make it executable):

For kernel 3.0 (Ubuntu 11.10):

EHCI_BUSES="0000:00:1a.0 0000:00:1d.0"
XHCI_BUSES="0000:03:00.0"
case "${1}" in
    hibernate|suspend)
        # Switch USB buses off
        for bus in $EHCI_BUSES; do
            echo -n $bus > /sys/bus/pci/drivers/ehci_hcd/unbind
        done
        for bus in $XHCI_BUSES; do
            echo -n $bus > /sys/bus/pci/drivers/xhci_hcd/unbind
        done
        ;;
    resume|thaw)
        # Switch USB buses back on
        for bus in $EHCI_BUSES; do
            echo -n $bus > /sys/bus/pci/drivers/ehci_hcd/bind
        done
        for bus in $XHCI_BUSES; do
            echo -n $bus > /sys/bus/pci/drivers/xhci_hcd/bind
        done
        # Hacky workaround to fix display after suspend, not needed for kernels 3.1 or newer
        export DISPLAY=":0"
        export XAUTHORITY=`ps aux | grep X | grep auth | awk '{sub( /^.*-auth / ,""); sub( / .*/,"");print }'`
        xset dpms force off
        xset dpms force on
        ;;
esac

Wireless

Many users report that this works out of the box.

Many users have also reported bad signal strengths, or random disconnections with low signal levels in Ubuntu 11.10.

For some, frequent disconnections are shown in dmesg but are not visibly indicated. If you are getting poor wireless performance run dmesg to check or run tail -f /var/log/kern.log.

Possible workaround: run sudo killall wpa_supplicant after booting (see here)

Possible workaround: patch network-manager (see here)

Possible workaround: set the BSSID for your single access-point network (see here)

Possible workaround: remove network-manager and install wicd. You'll have to manually enable the tray icons in Unity (see here)

See this bug report also, and mark yourself as affected.

USB Ethernet

For Ubuntu 11.10 and earlier kernels, or if you still experience instability, download the asix-driver from http://www.asix.com.tw/FrootAttach/driver/AX88772B_772A_760_772_178_LINUX_Driver_v4.2.0_Source.zip

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

Then download essentials:

sudo apt-get install build-essential linux-headers-`uname -r`

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

cd AX88772B_772A_760_772_178_LINUX_Driver_v4.2.0_Source

make

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.

For 3.2 kernels, the following patch has to be applied:

--- a/asix.c    2011-03-10 13:46:05.000000000 +0100
+++ b/asix.c    2011-11-26 09:39:48.000000000 +0100
@@ -829,7 +829,7 @@
        .ndo_do_ioctl           = ax8817x_ioctl,
        .ndo_set_mac_address            = ax8817x_set_mac_addr,
        .ndo_validate_addr              = eth_validate_addr,
-       .ndo_set_multicast_list = ax8817x_set_multicast,
+       .ndo_set_rx_mode        = ax8817x_set_multicast,
 };
 #endif
 
@@ -1522,7 +1522,7 @@
        .ndo_get_stats          = axusbnet_get_stats,
        .ndo_set_mac_address    = ax8817x_set_mac_addr,
        .ndo_validate_addr              = eth_validate_addr,
-       .ndo_set_multicast_list = ax88772b_set_multicast,
+       .ndo_set_rx_mode = ax88772b_set_multicast,
 };
 #endif

Bluetooth

The bluetooth module is the Atheros AR3012, which requires loading a firmware before it can be used. For now, patching the kernel is required to recognize this module as AR3012 one.

The patch, and it's upstream progress, can be seen here: http://thread.gmane.org/gmane.linux.bluez.kernel/18801

More info: http://ubuntuforums.org/showthread.php?t=1867447&highlight=zenbook

Reported to Ubuntu kernel Team http://bugs.launchpad.net/ubuntu/+source/linux/+bug/916319

Power Saving Optimizations

Kernel parameters

To get the most power efficient system with longer battery life and cooler CPU temperatures, the configuration recommended so far is to disable VT-d in the BIOS and boot kernel 3.2-rc6 or newer with the boot options:

i915.i915_enable_rc6=1 i915.semaphores=1 pcie_aspm=force

RC6 and semaphores are disabled by default in final kernel 3.2, so they should be forced on. FBC should not be enabled and has not shown any improvements. LVDS downclock does not have any effect on the ZenBook since it's eDP.

To disable VT-d, reboot your Zenbook, holding down the Esc-button while it starts up. Locate the VT-d setting in the BIOS menus and toggle it to disabled.

Occasional shutdowns still occur but the cause it yet unknown - it might be the ath9k driver or something related to RC6 or ASPM. (This was fixed on kernel 3.3.0-rc6)

Note that this configuration trades off a bit of stability (unexpected shutdowns) for power efficiency. Without these RC6 settings, you will have less battery life etc., but the system will be perfectly stable (or so it seems).

possible patch: modifying the DSDT table seems to fully stabilize the system with RC6 active, acording to http://files.benesovi.eu/ux31e/ (This patch is not necessary since kernel 3.3.0-rc6) - Note: Patch does not solve the problem. system still shuts down sometimes (MM)

Power saving scripts

To apply all recommendations by powertop when on battery, put the following in a script (the name does not matter) in /etc/pm/power.d:

# Powertop tunables

case $1 in
        true)
                ## VM writeback timeout
                echo 1500 > /proc/sys/vm/dirty_writeback_centisecs

                ## Autosuspend for USB devices

                ### USB2.0-CRW (Generic)
                echo auto > /sys/bus/usb/devices/1-1.7/power/level

                ### Bluetooth USB Host Controller (Atheros Communications)
                echo auto > /sys/bus/usb/devices/1-1.8/power/level

                ## Runtime PM for PCI devices

                ### Atheros Communications Inc. AR9485 Wireless Network Adapter
                echo auto > /sys/bus/pci/devices/0000:02:00.0/power/control

                ### Fresco Logic Device 1009
                #echo auto > /sys/bus/pci/devices/0000:03:00.0/power/control
                # Currently this turns the USB3 port off, awaiting response

                ### Intel Corporation 6 Series/C200 Series Chipset Family
                ### 6 port SATA AHCI Controller
                echo auto > /sys/bus/pci/devices/0000:00:1f.2/power/control

                ### Intel Corporation 6 Series/C200 Series Chipset Family
                ### USB Enhanced Host Controller #1
                # echo auto > /sys/bus/pci/devices/0000:00:1d.0/power/control
                # Causes machine to freeze on shutdown, should work with kernels 3.0.11, 3.1.3 or newer

                ### Intel Corporation 2nd Generation Core Processor Family
                ### DRAM Controller
                echo auto > /sys/bus/pci/devices/0000:00:00.0/power/control

                ### Intel Corporation 6 Series/C200 Series Chipset Family
                ### MEI Controller #1
                echo auto > /sys/bus/pci/devices/0000:00:16.0/power/control

                ### Intel Corporation 6 Series/C200 Series Chipset Family
                ### High Definition Audio Controller
                echo auto > /sys/bus/pci/devices/0000:00:1b.0/power/control

                ### Intel Corporation 6 Series/C200 Series Chipset Family
                ### PCI Express Root Port 1
                echo auto > /sys/bus/pci/devices/0000:00:1c.0/power/control

                ### Intel Corporation 6 Series/C200 Series Chipset Family
                ### PCI Express Root Port 2
                echo auto > /sys/bus/pci/devices/0000:00:1c.1/power/control

                ### Intel Corporation 6 Series/C200 Series Chipset Family
                ### PCI Express Root Port 4
                echo auto > /sys/bus/pci/devices/0000:00:1c.3/power/control

                ### Intel Corporation 2nd Generation Core Processor Family
                ### Integrated Graphics Controller
                echo auto > /sys/bus/pci/devices/0000:00:02.0/power/control

                ## SATA link power management
                echo min_power > /sys/class/scsi_host/host0/link_power_management_policy

                # 50% screen brightness on battery
                echo 5 > /sys/bus/pci/devices/0000:00:02.0/backlight/acpi_video0/brightness

                # Set powersave CPU governor
                for i in 0 1 2 3; do
                    echo powersave > /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
                done
        ;;
        false)
                # 90% screen brightness on AC
                echo 9 > /sys/bus/pci/devices/0000:00:02.0/backlight/acpi_video0/brightness

                # Set ondemand CPU governor
                for i in 0 1 2 3; do
                    echo ondemand > /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
                done
        ;;
esac

exit 0

How to upgrade kernel

WARNING: This is a long operation and not usually recommended if you don't know what you're doing.

If you want to upgrade to the newest kernel, which improves power use, wlan and a number of other issues which are solved from time to time, do the following:

1. Set kernel options

Edit the kernel options in grub (using nano, vi, gedit or any other editor):

sudo nano /etc/default/grub

And change the line starting with GRUB_CMDLINE_LINUX_DEFAULT to:

GRUB_CMDLINE_LINUX_DEFAULT="pcie_aspm=force quiet splash"

save and run update-grub:

update-grub

2. Download the kernel

Browse to http://kernel.ubuntu.com/~kernel-ppa/mainline/ to find the latest kernel (e.g. 'v3.2.2-precise', which is kernel version 3.2.2 and works also on Oneiric), and from that folder download 3 files:

linux-headers-<version>-<other stuff>_amd64.deb
linux-headers-<version>-<other stuff>_all.deb 
linux-image-<version>-<other stuff>_amd64.deb

3. Install the kernel

Open a terminal and change to the directory where you downloaded these files, and run

sudo dpkg -i linux-*.deb

(if you have older linux-*.deb files laying around in that folder, you should specify the new files explicitly instead of using wildcards). Reboot to run the new kernel. You can verify the kernel version from the grub menu selection, or by running

uname -a

How to recompile kernel for Ubuntu 12.04 LTS and ux31e

1.Install some tools to compile: Code:

sudo su -
apt-get install fakeroot build-essential
apt-get install crash kexec-tools makedumpfile kernel-wedge
apt-get build-dep linux-image-$(uname -r)
apt-get install git libncurses5 libncurses5-dev libnewt-dev
exit

2. Create some directory somewhere where you'd like to store the source files you'll want to compile, I'm calling it "kernel". Cd into that directory and get the kernel sources via git. Code:

git clone git://kernel.ubuntu.com/ubuntu/ubuntu-oneiric.git  source

3. Download kernel last source from http://www.kernel.org/ and uncompress it.

http://www.kernel.org/pub/linux/kernel/v3.0/testing/linux-3.3-rc5.tar.bz2

4. Donwload felsi's bluetooth patch

wget http://fenski.pl/zenbook/bluetooth.patch

and apply patch on 3.3-rc5 folder.

patch -p1 < ./bluetooth.patch

note that within the patch the paths are still linking to kernel version 3.2.5. You have to enter the respetive path to where you have downloaded and unpacked the kernel (e.g. linux-3.3-rc6/drivers/bluetooth/).

5. Now you'll actually have to compile the source. This takes commands: Code:

make menuconfig
fakeroot make-kpkg clean
fakeroot make-kpkg --jobs=4 --initrd --append-to-version=-ux31custom --revision=`date +'%Y%m%d%H%M'` kernel_image kernel_headers modules_image

6. the compiled kernel packages will be in the parent folder. So make a "cd .." and install: Code:

sudo dpkg -i linux-*.deb

7. Just for safety, update grub Code:

sudo update-grub