Arch Linux

barbas

Member

Registered: 2015-01-16

Posts: 3

Discrete graphics card not switching off - kernel 3.18

Hi there,

I'm currently running Archlinux on an Acer 4820TG laptop with two graphics card: Intel (onboard) and AMD Radeon HD 6550M.

After upgrade to kernel version 3.18.2-2-ARCH, the command echo OFF > /sys/kernel/debug/vgaswitcheroo/switch that I've been using doesn't switch the discrete graphics card off.

This way battery drains rather rapidly

Additional info:
Intel driver: xf86-video-intel 2.99.917-1
Radeon driver: xf86-video-ati 1:7.5.0-1

Help would be appreciated. Thanks!