@steve echo 4 > /proc/acpi/video/IGD/DOS bash: /proc/acpi/video/IGD/DOS: Permission denied andrew@msiu:~$ sudo echo 4 > /proc/acpi/video/IGD/DOS bash: /proc/acpi/video/IGD/DOS: Permission denied
@steve video/IGD/ DOS video/IGD/ DOS: Permission denied video/IGD/ DOS video/IGD/ DOS: Permission denied
echo 4 > /proc/acpi/
bash: /proc/acpi/
andrew@msiu:~$ sudo echo 4 > /proc/acpi/
bash: /proc/acpi/