Get a Wacom Intuos CTL-490 Working in Ubuntu Crouton?

Question

I installed Ubuntu on my Acer Chromebook via crouton, and am having a hell of a time getting my Wacom Intuos CTL-490 working.

It's not recognized at all, either for cursor movement or for clicking, so I started following the instructions here, however the very first step is giving me problems.

sudo apt-get install linux-headers-$(uname -r) build-essential

Outputs the following:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package linux-headers-3.18.0-17554-g9194949d4df2
E: Couldn't find any package by glob 'linux-headers-3.18.0-17554-g9194949d4df2'
E: Couldn't find any package by regex 'linux-headers-3.18.0-17554-g9194949d4df2'

It's shown above, but just to be clear, the output of uname -r is:

3.18.0-17554-g9194949d4df2

I tried editing my /etc/apt/sources.list such that it looks like this:

deb http://archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse contrib non-free
deb-src http://archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse

I added contrib non-free to the end of the first line.

I went ahead and tried to continue following the instructions linked above, but eventually after running the following:

if test -x ./autogen.sh; then ./autogen.sh; else ./configure; fi && make && sudo make install || echo "Build Failed"

I got the following build error (at the end of other output that looks to be successful):

checking for kernel source/headers... not found
configure: WARNING: Unable to find build config in any of:
      [/lib/modules/3.18.0-17554-g9194949d4df2/source],
      [/lib/modules/3.18.0-17554-g9194949d4df2/build],
      [/usr/src/linux],
      [/usr/src/linux-3.18.0-17554-g9194949d4df2],
      [/usr/src/linux-2.6]


configure: WARNING: Kernel directory does not appear to have needed config files
checking kernel version... 
configure: WARNING: Spcified '3.18.0-17554-g9194949d4df2' kernel, but found '' instead
configure: error: We could not find the development environment to build modules for the '3.18.0-17554-g9194949d4df2' kernel within the '' directory. Please install the kernel source or the kernel development package and try again.
Build Failed

Which I'm assuming is because I was unable to install the linux-headers... dependency from above.

If anyone has any insight on this it would be greatly appreciated, this is so frustrating all I want to do is draw pictures.

Answer 1

NOTE: I don't own a Chromebook and hence I've not tested any of the below steps. Attempt this after making a backup of your important data

---

Step 1 :: Build Kernel Headers

All commands to be performed in the chrooted Ubuntu Shell

a) Get Kernel Sources

Install the following packages to get kernel sources:

sudo apt-get install git-core make kernel-package bc

Now pull chromeos-3.18 from the kernel repo:

git clone https://chromium.googlesource.com/chromiumos/third_party/kernel -b chromeos-3.18

Now there are possibly multiple versions of kernels that can be under the 3.18 version (which is what the numbers after 3.18 specify in uname - r

So perform the following steps:

cd kernel
./chromeos/scripts/prepareconfig chromeos-intel-pineview
make oldconfig
make kernelrelease

If the version from the uname command above does not match what is displayed, and is instead a later version, you need to figure out the right commit from which your kernel was built, to do that

git reset --hard origin/chromeos-3.18
git checkout HEAD~[commits-before]
./chromeos/scripts/prepareconfig chromeos-intel-pineview
make oldconfig
make kernelrelease

Replace [commits-before] with a number. You might have to do this multiple times until you get to the right kernel version specified by uname -r

b) Make the kernel image and headers

Disable halting on warnings by:

cd kernel && sed -i s/CONFIG_ERROR_ON_WARNING=y/CONFIG_ERROR_ON_WARNING=n chromeos/config/base.config

Now make the kernel by

./chromeos/scripts/prepareconfig chromeos-intel-pineview
make oldconfig

Now we must create deb packages of the kernel-image and headers by using

sudo make-kpkg --rootcmd fakeroot kernel_image kernel_headers

Ensure that the .debs are made by using ls ~/linux-*.deb

Do not install them yet as that will lead to ChromeOS becoming unbootable as /lib/modules is still mounted within the chroot

Create the following /etc/rc.local or add this to your /etc/rc.local if you already have one.

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

# umount bindmounts /lib/modules from enter-chroot
for m in `cat /proc/mounts | /usr/bin/cut -d ' ' -f2 | grep /lib/modules| grep -v "^/$" `; do
        umount "$m"
done
# try to load wacom drivers
if [ `find /sys/module/ -name "wacom*" -type d` ]; then
    # check if module_locking is disabled
    if ! grep -q "module_locking=0" /proc/cmdline; then
        exit 2
    fi
    modprobe wacom
    modprobe wacom_w8001
fi

exit 0

Mark it as an excecutable by sudo chmod +x /etc/rc.local and logout and log back in. Check if everything in /lib/modules is umounted so we can install our two deb files:

cat /proc/mounts | grep /lib/modules

Now install our debs by

sudo dpkg -i linux-*.deb

Reboot and proceed

---

Step 2 :: Install wacom drivers

Download the sources for the wacom driver:

git clone https://github.com/linuxwacom/input-wacom

Now install the drivers:

cd input-wacom && if test -x ./autogen.sh; then ./autogen.sh; else ./configure; fi && make && sudo make install || echo "Build Failed"

The updated driver should automatically load after rebooting the system.

---

Sources: Installing VirtualBox on Crouton

Installing Wacom modules for old linux kernels