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Kian Maleki
Asked: 2020-12-16 09:00:06 +0800 CST

Why do I have "Unassigned class [ff00]: Realtek Semiconductor"?

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It seems that everything in my Ubuntu is working properly. I just noticed that when I use

lspci

The last three lines are,

01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter (rev 01)

05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller (rev 07`)

06:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader (rev 01)

Why does the last line say "Unassigned class [ff00]" ? Is there anything that I need to install or assign?

realtek lspci

2 Answers

  1. There is nothing to worry about. This PCI device is a Card reader.

    There is no special class for these devices in PCI, so it is shown as Unassigned class.

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  2. Try something as simple as:

    modprobe -r rtsx_pci
modprobe rtsx_pci

    This is because rtsx_pci module manages the card reader. Sometimes it doesn't work properly on boot.

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