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⇱ Linux 6.19 To Add Support For The Realtek RTL8125K - Phoronix


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Linux 6.19 To Add Support For The Realtek RTL8125K

Written by Michael Larabel in Linux Networking on 21 November 2025 at 09:58 AM EST. 11 Comments
The upcoming Linux 6.19 kernel cycle is set to introduce support for the Realtek RTL8125K as a forthcoming Ethernet ASIC.

The Realtek RTL8125K doesn't appear to have been formally announced yet or at least isn't showing up anywhere prominent online. The Linux enablement patches coming for the Linux 6.19 kernel put the RTL8125K as an extension of the Realtek RTL8125D 2.5G Ethernet ASICs already launched and supported by the mainline Linux kernel last year.

Queued recently into the networking subsystem's "net-next" code of new material coming for the Linux 6.19 merge window is this patch adding the RTL8125K support to the existing r8169 networking driver. Besides a new device ID, the only other driver-side difference with this new chip is also needign a different firmware binary.

👁 RTL8125K Linux driver enabling


The Realtek RTL8125K firmware was merged last week to the linux-firmware.git repository.

Long story short, once the Realtek RTL8125K 2.5G chip starts appearing in devices, the Linux support is ready to go with Linux 6.19+.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.