type
status
date
Jul 5, 2023 05:29 AM
slug
summary
tags
category
icon
password
Fix driver problems with Realtek NICs by installing r8168.
Introduction
The Linux r8169 driver for the Realtek network chips does not always work correctly up to kernel version 4.16. There can be timeouts and/or frequent link up/link down state changes, bandwidth problems and even system crashes may occur.
One solution is to use the official Realtek r8168 driver (instead of r8169). It can be installed from external repositories or compiled by yourself. As an alternative, you can upgrade the kernel to version 4.17+.
This article describes how to setup the network driver.
现象:
网卡不定时卡死
ssh 偶尔卡顿一下
Option A - Installing kmod-r8168 from elrepo.org
ELRepo is an RPM repository for Enterprise Linux packages. ELRepo supports Red Hat Enterprise Linux and its derivatives (CentOS, Scientific Linux and others). It is the easiest way to get the r8168 driver for the standard upstream kernels.
NOTE: If you are using a special kernel like Virtuozzo, OpenVZ or something similar you MUST compile the module yourself!
Import the public key:
rpm --import http://elrepo.org/RPM-GPG-KEY-elrepo.orgInstall ELRepo for RHEL 6, CentOS 6 or SL 6:
rpm -Uhv http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpmFor RHEL 7, CentOS 7 or SL 7:
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpmInstall the kmod-r8168 Realtek r8168 driver:
yum --enablerepo=elrepo install kmod-r8168After a reboot of the server the new driver will be used. It stays active even after kernel upgrades.
Option B - Installation from source
Step 1 - Prerequisites
Please make sure you are running the latest kernel available by running
yum or apt-get and then rebooting.CentOS
On CentOS the header packages of the
kernel, kernel-devel and kernel-headers, as well as the compiler, will need to be installed to replace the driver:yum install gcc gcc-c++ kernel-devel kernel-headersDebian/Ubuntu
In Debian/Ubuntu the name of the header package depends on the selected kernel. It can be for example
linux-headers-generic or linux-headers-server. All the other required packages will be installed via build-essentials:aptitude install build-essential linux-headers-`uname -r`Proxmox
In Proxmox the headers can be found in the pve-headers package
aptitude install pve-headers-`uname -r`Step 2 - Getting the sources
Step 3 - Compiling the driver
The package contains an
autorun.sh script that automatically compiles the drivers and replaces the present r8169 driver. Doing so means the network connection is lost. You should therefore start this script in a screen session and only use it if you are absolutely sure that the kernel module can be compiled without errors. You can check this beforehand through make modules.or
make allIf there are no errors with
make modules, you can replace the driver in the current system. In this case the network connection is interrupted and the r8169 driver permanently disabled!If you do not want an interruption of the system or you want to only temporarily disable the r8169 driver, you can instead compile the driver as shown below.
Step 4 - Activating the new driver
CentOS
In the file
/etc/modprobe.conf the appropriate driver for eth0 needs to be edited. To do this the linealias eth0 r8169must be changed to
alias eth0 r8168The new driver must now be activated. To do this a simple shell script can be created that does the necessary steps.
Execute that script:
sh /tmp/r8168After several seconds the server should be back online using the new network driver. The working directory can now be removed:
rm -rf /root/r8168Debian/Ubuntu
After installing the driver, update the module dependencies.
depmod -aFirst the r8169 network driver needs to be blocked, so as to prevent the kernel from loading it. Note: If additional NICs are installed in the server, the driver must not be blocked.
Ubuntu/Debian 6.0 (Squeeze):
echo "blacklist r8169" >> /etc/modprobe.d/blacklist.confNext, the kernel must be forced to include the driver in the initrd. This also ensures that if additional NICs have been installed the new r8168 module is loaded before the r8169 module.
echo "r8168" >> /etc/initramfs-tools/modulesAfterwards the initrd will be rebuilt.
update-initramfs -v -t -uNow you can reboot the server.
After a kernel update the driver might need to be recompiled.
Conclusion
Either of the two ways shown here should eliminate the problems with the Realtek network chip.
升级系统后网卡找不到的处理方法
重新安装驱动