SRU: https://lists.ubuntu.com/archives/kernel-
team/2021-February/117452.html
** Description changed:
+ [SRU Justification]
+
+ [Impact]
+
+ Missing firmware for Realtek RTL8125B 2.5Gb Ethernet-NIC, which
+ is supported by linux-oem-5.10 kernel.
+
+ [Fix]
+
+ Two upstream commit necessary:
+ * commit 3890db36665d ("rtl_nic: add firmware for RTL8125B")
+ * commit 69c7f0bdc76e ("rtl_nic: update firmware for RTL8125B")
+
+ [Test Case]
+
+ Without firmware, drive probe would fail with:
+
+ $ dmesg | grep -i r8169
+ r8169 0000:06:00.0: unknown chip XID 641
+
+ With firmware, it should then succeed:
+
+ $ dmesg | grep -i r8169
+ r8169 0000:07:00.0 eth0: RTL8125B, b4:2e:99:ef:c6:82, XID 641, IRQ 66
+ r8169 0000:07:00.0 eth0: jumbo features [frames: 9194 bytes, tx
checksumming: ko]
+ r8169 0000:07:00.0 eno1: renamed from eth0
+ RTL8125B 2.5Gbps internal r8169-700:00: attached PHY driver [RTL8125B
2.5Gbps internal] (mii_bus:phy_addr=r8169-700:00, irq=IGNORE)
+
+ [Where problems could occur]
+
+ While this introduces new firmware blobs and enabled devices supported
+ by new kernels, it should have little effect on existing systems, but
+ with new devices up and running, it may still affect power consumptions,
+ ability to enter deep suspend, etc.
+
+ [Other Info]
+
+ RTL8125B is supported by Linux kernel since v5.9 and on, so only Focal
+ is nominated specifically for linux-oem-5.10 kernel.
+
+ ========== original bug description ==========
+
https://askubuntu.com/questions/1259947/cant-get-rtl8125b-working-
on-20-04
$ lspci -knn | grep Eth -A3
06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125
2.5GbE Controller [10ec:8125] (rev 04)
Subsystem: ASUSTeK Computer Inc. RTL8125 2.5GbE Controller [1043:87d7]
Kernel modules: r8169
07:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1002:67df] (rev
e7)
$ dmesg | grep -i r8169
[ 0.911236] r8169 0000:06:00.0: unknown chip XID 64
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https://bugs.launchpad.net/bugs/1916558
Title:
Possible missing firmware /lib/firmware/rtl_nic/rtl8125b-2.fw for
module r8169
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