49 lines
1.4 KiB
Bash
Executable file
49 lines
1.4 KiB
Bash
Executable file
#!/bin/bash
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#
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SOURCE=/root/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9
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DEST=/sys/firmware/efi/efivars/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9
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needs_nvram_reset="no"
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# Colors
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CLEAR='\033[0m'
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RED='\033[31m'
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GREEN='\033[32m'
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YELLOW='\033[33m'
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ORANGE='\033[31;1m'
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BLUE='\033[34m'
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# Check for current variables
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for prefix in gfx gpu; do
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for var in /sys/firmware/efi/efivars/${prefix}*; do
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# The test below is to avoid empty or nonexistent paths
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if [[ -e "${var}" ]]; then
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echo -e "${YELLOW}Detected:${CLEAR} $var"
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needs_nvram_reset="yes"
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fi
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done
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done
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echo ""
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if [[ ! -e "/sys/firmware/efi/efivars" ]]; then
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# Probably booted legacy
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echo -e "${RED}ERROR:${CLEAR} EFIVARS not found"
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elif cmp "$SOURCE" "$DEST" >/dev/null 2>&1; then
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# EFI var matches desired state
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echo -e "${GREEN}Discrete GPU already disabled${CLEAR}"
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elif [[ "$needs_nvram_reset" == "yes" ]]; then
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# One or more gfx/gpu EFI vars detected
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echo -e "${RED}ERROR:${CLEAR} Detected the above EFIVARS"
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echo -e "Please reboot and reset the NVRAM"
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else
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# No gfx/gpu EFI vars detected so we can apply the fix
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cp "$SOURCE" "$DEST"
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chattr +i "$DEST"
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sync
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umount /sys/firmware/efi/efivars
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echo -e "${GREEN}Discrete GPU successfully disabled${CLEAR}"
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mount -t efivarfs efivarfs /sys/firmware/efi/efivars
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fi
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echo ""
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read -p "Press Enter to poweroff the system... " -r unusedvar
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poweroff
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