In order to get wireless connectivity and in order to hear audio from the audio jack on Trisquel 4.0 one needs to install updates (which include a newer kernel) and to enable wireless connectivity in the BIOS.

To get the internal microphone working I upgraded the alsa-driver code as mentioned here:

https://wiki.ubuntu.com/Audio/InstallingLinuxAlsaDriverModules

This is what needs to be done:

sudo add-apt-repository ppa:ubuntu-audio-dev/ppa
sudo aptitude update
sudo aptitude install linux-alsa-driver-modules-$(uname -r)

Then restart the computer and in gnome-alsamixer (if you don't have it install it via apt-get) set mic boost to 0%, capture to 90% and remaining controls to 100%.

To get FN keys type this command in the terminal:

sudo gedit /etc/default/grub

and replace

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

by

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"

Ubuntu's help page recommends replacing the line by the one below instead for better power management

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"

as you can see here:

https://help.ubuntu.com/community/EeePC/Fixes

Then type in the terminal

sudo update-grub

and restart the computer.

To disable the clicking sound when battery is used just type this in the terminal:

sudo hdparm -B 254 /dev/sda

In order to save this setting add the following lines to /etc/hdparm.conf:

/dev/sda {
         apm_battery = 254
 }

Note also that this netbook can be purchased without Windows preinstalled.

Here are the outputs:

lsusb

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 13d3:5702 IMC Networks 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

lspci -nnk

00:00.0 Host bridge [0600]: Intel Corporation N10 Family DMI Bridge [8086:a010]
	Kernel driver in use: agpgart-intel
	Kernel modules: intel-agp
00:02.0 VGA compatible controller [0300]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a011]
	Kernel driver in use: i915
	Kernel modules: i915
00:02.1 Display controller [0380]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a012]
00:1b.0 Audio device [0403]: Intel Corporation N10/ICH 7 Family High Definition Audio Controller [8086:27d8] (rev 02)
	Kernel driver in use: HDA Intel
	Kernel modules: snd-hda-intel
00:1c.0 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port 1 [8086:27d0] (rev 02)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1c.1 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port 2 [8086:27d2] (rev 02)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1c.3 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port 4 [8086:27d6] (rev 02)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:1d.0 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 [8086:27c8] (rev 02)
	Kernel driver in use: uhci_hcd
00:1d.1 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 [8086:27c9] (rev 02)
	Kernel driver in use: uhci_hcd
00:1d.2 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 [8086:27ca] (rev 02)
	Kernel driver in use: uhci_hcd
00:1d.3 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 [8086:27cb] (rev 02)
	Kernel driver in use: uhci_hcd
00:1d.7 USB Controller [0c03]: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller [8086:27cc] (rev 02)
	Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev e2)
00:1f.0 ISA bridge [0601]: Intel Corporation NM10 Family LPC Controller [8086:27bc] (rev 02)
00:1f.2 SATA controller [0106]: Intel Corporation N10/ICH7 Family SATA AHCI Controller [8086:27c1] (rev 02)
	Kernel driver in use: ahci
	Kernel modules: ahci
00:1f.3 SMBus [0c05]: Intel Corporation N10/ICH 7 Family SMBus Controller [8086:27da] (rev 02)
	Kernel modules: i2c-i801
01:00.0 Ethernet controller [0200]: Atheros Communications AR8132 Fast Ethernet [1969:1062] (rev c0)
	Kernel driver in use: atl1c
	Kernel modules: atl1c
02:00.0 Network controller [0280]: Atheros Communications Inc. AR2427 Wireless Network Adapter (PCI-Express) [168c:002c] (rev 01)
	Kernel driver in use: ath9k
	Kernel modules: ath9k