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.
Suspend and resume
Brightness control works until sleep but after resume it does not.
Adding acpi_osi=Linux acpi_backlight=vendor
to kernel-line (see Kernel Parameters) helped me.
There is another solution here: https://bbs.archlinux.org/viewtopic.php?id=132044