[Chakra/Linux]把弄A卡開源驅動 Radeon 的 Power Management
            使用Udev開機是開啓,先新建:
sudo kate /etc/udev/rules.d/30-radeon-pm.rules`
 然後填入:
`KERNEL=="card0", SUBSYSTEM=="drm", DRIVERS=="radeon", ATTR{device/power_method}="profile",  ATTR{device/power_profile}="low"
完成:)
