![]() ![]() ![]() Using udevadm info -a /dev/ will give information for each device already loaded. Udev uses aliasing of the modules to the bus/device names then loads the moduels as needed and creates device files. In practice one also wants automatic loading of modules as events and rules. The device driver than creates device nodes in DEVfs with the bus and major and minor numbers of the device but this system has major limitations. Technically bus devices notify the kernel of new devices and those devices get loaded with which ever module supports that device. In fact modules can depend on each other as well and some "drivers" exist in the kernel itself. When you get these warnings it indicates modules are installed but the current system may or may not have devices that use them.īecause drivers are actually parts of modules it gets a little involved to check a kind of driver in use per device scheme. ![]() The warning therefor is stilling you that you have modules installed for which no firmware exists and therefor no proper way to detect hardware that is compatible with it. Notice the driver firmware for aic94xx here does not have an open source license. Meaning the system has a module but some of its firmware is not installed which is the case for certain binary blobs or other distribution issues. The warning the modules may be missing firmware. ![]()
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