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.
xbacklight fromworks fine.
Suspend and resume
Brightness controls works until sleep. After resume brightness does not work.
Adding to kernel
acpi_osi=Linux acpi_backlight=vendor bootloaders kernel-line (see Kernel Parameters) helped me.
There is another solution here: https://bbs.archlinux.org/viewtopic.php?id=132044