Comment 10 for bug 1956294

I still can not set to 50Mb/s with 5.13 kernel which has these 2 patches. Is there any other physical condition needed?

$ uname -a
Linux scobee-kernel 5.4.0-107-generic #121-Ubuntu SMP Thu Mar 24 16:07:22 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
$ sudo ethtool -s enp189s0f0 speed 50
Cannot advertise speed 50
$ sudo ethtool enp189s0f0 | grep Speed
 Speed: 1000Mb/s

$ uname -a
Linux scobee-kernel 5.13.0-39-generic #44~20.04.1-Ubuntu SMP Thu Mar 24 16:47:35 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
$ sudo ethtool -s enp189s0f0 speed 50
Cannot advertise speed 50
$ sudo ethtool enp189s0f0 | grep Speed
 Speed: 1000Mb/s