rmmod nvidia-current if lsmod | grep -q nvidia; then echo "Error: could not unload nvidia module, leaving card turned on" exit fi modprobe acpi_call if ! lsmod | grep -q acpi_call; then echo "Error: acpi_call module not loaded" exit fi acpi_call () { echo "$*" > /proc/acpi/call result=$(cat /proc/acpi/call) case "$result" in Error*) echo "Disabling nVidia card failed ($result)." ;; *) echo "Disabling nVidia card succeeded." ;; esac } echo _DSM $(acpi_call "\_SB.PCI0.PEG0.PEGP._DSM {0xF8,0xD8,0x86,0xA4,0xDA,0x0B,0x1B,0x47,0xA7,0x2B,0x60,0x42,0xA6,0xB5,0xBE,0xE0} 0x100 0x1A {0x1,0x0,0x0,0x3}") echo _PS3 $(acpi_call "\_SB.PCI0.PEG0.PEGP._PS3")