CentOS-7.9.md

CentOS 7.9

• Kernel version: 3.10.0-1160.21.1.el7.x86_64
• Download Link: http://isoredirect.centos.org/centos/7/isos/x86_64/

Prerequisite

• Update system packages to latest version

yum distro-sync

• Install packages

# install kernel devel and header packages
yum install "kernel-devel-$(uname -r)"
yum install "kernel-headers-$(uname -r)"
yum install gcc

• After installing the kernel packages, you can find all the kernel headers files in /usr/src/kernels directory using following command.

ls /lib/modules/$(uname -r)
ls /usr/src/kernels/$(uname -r)

Issue: Device or resource busy when load gpio-it87 driver

• Add acpi_enforce_resources=lax on boot parameter

# Edit grub config
vi /etc/default/grub
GRUB_CMDLINE_LINUX="[...] acpi_enforce_resources=lax"

# If you change this file, run 'grub2-mkconfig' afterwards to update
grub2-mkconfig -o /etc/grub2.cfg
grub2-mkconfig -o /etc/grub2-efi.cfg

Enforce to use it87 series driver instead of iTCO driver (if needed)

vi /lib/modprobe.d/iTCO-blacklist.conf

blacklist iTCO_wdt
blacklist iTCO_vendor_support

Build necessary drivers (please refer to product page)

Product Pages Link

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LTE cellular module dial up on CentOS 7.9 (Telit LE910C4 modules)

Telit/LE910C4

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Wi-Fi dial up on CentOS 7.9

Sparklan/WPEQ-261ACNI