Ugreen 5G (35921) reports as 2500 maximum on v2.20.1 though good on 2.21.4 #615
Description
Description of the problem
Updated my synology DS423+ to drivers v2.20.1 (2025/05/13), works fine on 2.5G globally
Tested a Ugreen 5G (35921), ethtool report 2500 max
On my own linux with v2.21.4 (2025/10/28), it reports 5000 max (Linux 6.8.0-51-generic #52-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec 5 13:09:44 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux)
Description of your products
DS423+
Linux NAS 4.4.302+ #86009 SMP Wed Nov 26 18:19:17 CST 2025 x86_64 GNU/Linux synology_geminilake_423+
DSM 7.3.2-86009 Update 1
Ugreen 5G (35921)
Output of lsusb command on Linux
Bus 002 Device 009: ID 0bda:8157 Realtek Semiconductor Corp. USB 10/100/1G/2.5G/5G LAN
Output of dmesg command on DS423+
r8152 2-1:1.0 eth2: v2.20.1 (2025/05/13)
r8152 2-1:1.0 eth2: This product is covered by one or more of the following p
atents:
US6,570,884, US6,115,776, and US6,327,625.
r8152 2-1:1.0 eth2: chip rev 14
r8152 2-1:1.0 eth2: carrier on
Output of dmesg command on Linux
[10659.892484] usb 2-7: New USB device strings: Mfr=1, Product=2, SerialNumber=6
[10659.892491] usb 2-7: Product: USB 10/100/1G/2.5G/5G LAN
[10659.892496] usb 2-7: Manufacturer: Realtek
[10659.892501] usb 2-7: SerialNumber: 0F03000001
[10659.921835] cdc_ncm 2-7:2.0: MAC-Address: 6c:1f:f7:5b:96:d3
[10659.921852] cdc_ncm 2-7:2.0: setting rx_max = 16384
[10659.921930] cdc_ncm 2-7:2.0: setting tx_max = 16384
[10659.922724] cdc_ncm 2-7:2.0 eth0: register 'cdc_ncm' at usb-0000:00:14.0-7, CDC NCM (NO ZLP), 6c:1f:f7:5b:9
6:d3
[10659.925513] cdc_ncm 2-7:2.0 eth0: unregister 'cdc_ncm' usb-0000:00:14.0-7, CDC NCM (NO ZLP)
[10660.063516] r8152-cfgselector 2-7: reset SuperSpeed USB device number 9 using xhci_hcd
[10660.209244] r8152 2-7:1.0 eth0: v2.21.4 (2025/10/28)
[10660.209261] r8152 2-7:1.0 eth0: This product is covered by one or more of the following patents:
US6,570,884, US6,115,776, and US6,327,625.
[10660.363619] r8152-cfgselector 2-7: reset SuperSpeed USB device number 9 using xhci_hcd
[10660.485755] r8152 2-7:1.0 eth0: v2.21.4 (2025/10/28)
[10660.485769] r8152 2-7:1.0 eth0: This product is covered by one or more of the following patents:
US6,570,884, US6,115,776, and US6,327,625.
[10660.727217] r8152 2-7:1.0 enx6c1ff75b96d3: renamed from eth0
[10664.101745] r8152 2-7:1.0 enx6c1ff75b96d3: carrier on
[10664.112974] IPv4: martian source 192.168.86.126 from 192.168.86.1, on dev enx6c1ff75b96d3