118 lines
2.9 KiB
Bash
Executable File
118 lines
2.9 KiB
Bash
Executable File
#!/bin/bash
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# Purpose: Remove Realtek out-of-kernel USB WiFi adapter drivers.
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#
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# Supports dkms and non-dkms removals.
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SCRIPT_NAME="remove-driver.sh"
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SCRIPT_VERSION="20221204"
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MODULE_NAME="8821cu"
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DRV_VERSION="5.12.0.4"
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OPTIONS_FILE="${MODULE_NAME}.conf"
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KVER="$(uname -r)"
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KARCH="$(uname -m)"
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KSRC="/lib/modules/${KVER}/build"
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MODDESTDIR="/lib/modules/${KVER}/kernel/drivers/net/wireless/"
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DRV_NAME="rtl${MODULE_NAME}"
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DRV_DIR="$(pwd)"
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# Some distros have a non-mainlined, patched-in kernel driver
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# that has to be deactivated.
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BLACKLIST_FILE="rtw88_8821cu.conf"
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# check to ensure sudo was used
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if [[ $EUID -ne 0 ]]
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then
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echo "You must run this script with superuser (root) privileges."
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echo "Try: \"sudo ./${SCRIPT_NAME}\""
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exit 1
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fi
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# support for the NoPrompt option allows non-interactive use of this script
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NO_PROMPT=0
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# get the script options
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while [ $# -gt 0 ]
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do
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case $1 in
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NoPrompt)
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NO_PROMPT=1 ;;
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*h|*help|*)
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echo "Syntax $0 <NoPrompt>"
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echo " NoPrompt - noninteractive mode"
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echo " -h|--help - Show help"
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exit 1
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;;
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esac
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shift
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done
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# displays script name and version
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echo "Running ${SCRIPT_NAME} version ${SCRIPT_VERSION}"
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# check for and remove non-dkms installation
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if [[ -f "${MODDESTDIR}${MODULE_NAME}.ko" ]]
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then
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echo "Removing a non-dkms installation."
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rm -f ${MODDESTDIR}${MODULE_NAME}.ko
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/sbin/depmod -a ${KVER}
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fi
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# information that helps with bug reports
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# kernel
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echo "Linux Kernel=${KVER}"
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# architecture - for ARM: aarch64 = 64 bit, armv7l = 32 bit
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echo "CPU Architecture=${KARCH}"
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# determine if dkms is installed and run the appropriate routines
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if command -v dkms >/dev/null 2>&1
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then
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echo "Removing a dkms installation."
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# 2>/dev/null suppresses the output of dkms
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dkms remove -m ${DRV_NAME} -v ${DRV_VERSION} --all 2>/dev/null
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RESULT=$?
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#echo "Result=${RESULT}"
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# RESULT will be 3 if there are no instances of module to remove
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# however we still need to remove various files or the install script
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# may complain.
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if [[ ("$RESULT" = "0")||("$RESULT" = "3") ]]
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then
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if [[ ("$RESULT" = "0") ]]
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then
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echo "${DRV_NAME}/${DRV_VERSION} has been removed"
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fi
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else
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echo "An error occurred. dkms remove error = ${RESULT}"
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echo "Please report this error."
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exit $RESULT
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fi
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fi
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echo "Removing ${BLACKLIST_FILE} from /etc/modprobe.d"
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rm -f /etc/modprobe.d/${BLACKLIST_FILE}
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echo "Removing ${OPTIONS_FILE} from /etc/modprobe.d"
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rm -f /etc/modprobe.d/${OPTIONS_FILE}
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echo "Removing source files from /usr/src/${DRV_NAME}-${DRV_VERSION}"
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rm -rf /usr/src/${DRV_NAME}-${DRV_VERSION}
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make clean >/dev/null 2>&1
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echo "The driver was removed successfully."
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echo "You may now delete the driver directory if desired."
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# if NoPrompt is not used, ask user some questions to complete removal
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if [ $NO_PROMPT -ne 1 ]
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then
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read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r
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echo
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if [[ $REPLY =~ ^[Yy]$ ]]
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then
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reboot
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fi
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fi
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exit 0
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