Toshiba Satellite R830
Wi-Fi & Ethernet
Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) and Intel Corporation 82579V Gigabit Ethernet with kernel 3.8 work out of the box.
Brightness
xbacklight from xorg-xbacklight works fine.
Brightness control after Suspend and resume
Brightness control works until sleep but after resume it does not.
In the past, adding acpi_osi=Linux acpi_backlight=vendor
to kernel-line (see Kernel Parameters[broken link: invalid section]) helped me.
A better solution that works on all DEs I've tested (XFCE,Gnome, Cinnamon) is using the video.disable_backlight_sysfs_if=1
kernel paramater. This should not be combined with the previously-mentioned kernel parameters.
There is another solution here: https://bbs.archlinux.org/viewtopic.php?id=132044
Another possibility is using a custom xorg configuration file. (Ignored by Gnome 3.16+)
In a terminal type:
sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf
Now edit this file:
sudo xdg-open /usr/share/X11/xorg.conf.d/20-intel.conf
Type the following code:
Section "Device" Identifier "card0" Driver "intel" Option "Backlight" "intel_backlight" BusID "PCI:0:2:0" EndSection
Save the file; log out and in again.
As of Kernel version 4.4, there is no need to change kernel boot parameters or or create xorg.conf files.