#VMware：修复 Ubuntu LInux “piix4_smbus Host SMBus controller not enabled”错误

在VMware虚拟机上安装的ubuntu在启动时，可能会出现一个错误：piix4_smbus 0000:00:007.3: Host SMBus controller not enabled!错误原因在Kernel driver i2c-piix4 中我们可以看到一段话：The PIIX4 (properly known as the 82371AB) is an Intel chip with

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3466人浏览 · 2021-04-27 13:02:36

WWWzq_ · 2021-04-27 13:02:36 发布

在VMware虚拟机上安装的ubuntu在启动时，可能会出现一个错误：

piix4_smbus 0000:00:007.3: Host SMBus controller not enabled!

错误原因

在Kernel driver i2c-piix4 中我们可以看到一段话：

The PIIX4 (properly known as the 82371AB) is an Intel chip with a lot of functionality. Among other things, it implements the PCI bus. One of its minor functions is implementing a System Management Bus. **This is a true SMBus - you can not access it on I2C levels. ** The good news is that it natively understands SMBus commands and you do not have to worry about timing problems. The bad news is that non-SMBus devices connected to it can confuse it mightily. Yes, this is known to happen…

piix4 的一个次要功能是实现SMBus，而我门不能在I2C级别上访问SMbus。
错误原因VMware实际上并没有为CPU访问提供那个级别的接口，但是Ubuntu试图加载该内核模块（piix4）。所以会报错，但是这个错误对系统没有影响。