blob: 4e1ddd2a667c551b860a461ad88ae57ed621c1be (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#!/bin/bash
# -------------------------------------------------------------------------
# GPU-SWITCH: Discrete Graphics Power & Bus Management
# Target: Razer Blade Stealth 13 (Late 2019) | Void Linux
# -------------------------------------------------------------------------
# Configuration: Static PCI Identifier for Turing dGPU
# We use a static ID because the device disappears from the bus when disabled.
DEVICE_ID="57:00.0"
PCI_PATH="/sys/bus/pci/devices/0000:$DEVICE_ID"
REQUIRED_MODULES=("nvidia_drm" "nvidia_modeset" "nvidia_uvm" "nvidia")
if [[ $EUID -ne 0 ]]; then
echo "[ERROR] Elevated privileges required. Please execute with sudo."
exit 1
fi
check_status() {
echo "--- System Graphics Status ---"
if [ -d "$PCI_PATH" ]; then
echo "Hardware State: [ ONLINE ] at $DEVICE_ID"
if lsmod | grep -q "nvidia"; then
echo "Driver State: [ LOADED ]"
else
echo "Driver State: [ UNLOADED ]"
fi
else
echo "Hardware State: [ OFFLINE ] (Device removed from PCI bus)"
echo "Driver State: [ UNLOADED ]"
fi
echo "------------------------------"
}
disable_gpu() {
echo "[INFO] Initializing dGPU shutdown sequence..."
# 1. Unload Kernel Modules
echo "[STEP 1/2] Terminating NVIDIA kernel modules..."
for mod in "${REQUIRED_MODULES[@]}"; do
if lsmod | grep -q "$mod"; then
modprobe -r "$mod" 2>/dev/null
if [ $? -ne 0 ]; then
echo "[WARN] Module $mod is currently in use. Ensure Xorg/i3 is not using the dGPU."
fi
fi
done
# 2. Physical Bus Removal
if [ -d "$PCI_PATH" ]; then
echo "[STEP 2/2] Detaching device from PCI bus..."
echo 1 > "$PCI_PATH/remove"
echo "[SUCCESS] dGPU has been isolated and powered down."
else
echo "[SKIP] Device is already detached from the bus."
fi
}
enable_gpu() {
echo "[INFO] Initializing dGPU activation sequence..."
# 1. Trigger PCI Rescan
echo "[STEP 1/2] Scanning PCI bridge for hardware changes..."
echo 1 > /sys/bus/pci/rescan
# Allow firmware-level handshake
sleep 2
# 2. Validate and Load Drivers
if [ -d "$PCI_PATH" ]; then
echo "[STEP 2/2] Hardware detected at $DEVICE_ID. Loading modules..."
for mod in "nvidia" "nvidia_uvm" "nvidia_modeset" "nvidia_drm"; do
modprobe "$mod"
done
echo "[SUCCESS] dGPU is now online and available for Prime Offload."
else
echo "[FATAL] Hardware failed to initialize at $DEVICE_ID."
echo "[DEBUG] Check 'dmesg | tail' for PCI link training errors."
fi
}
case "$1" in
on) enable_gpu ;;
off) disable_gpu ;;
status) check_status ;;
*) echo "Usage: gpu-switch {on|off|status}" ;;
esac
|
