Very slow connection speed with wireless RTL8812AE

[zacps]

This card is transplanted from a desktop running Windows 10, have previously gotten speeds of ~150Mb/s.
On Proxmox getting around 6Mb/s. Configured using the wpa_supplicant instructions on the wiki.

Any ideas what could be causing this?

Happy to post more information, just need to know what's useful.

$ lspci -v
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8812AE 802.11ac PCIe Wireless Network Adapter (rev 01)
    Subsystem: Realtek Semiconductor Co., Ltd. RTL8812AE 802.11ac PCIe Wireless Network Adapter
    Flags: bus master, fast devsel, latency 0, IRQ 41
    I/O ports at d000 [size=256]
    Memory at fb300000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: [40] Power Management version 3
    Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [70] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Device Serial Number 00-12-88-fe-ff-4c-e0-00
    Capabilities: [150] Latency Tolerance Reporting
    Capabilities: [158] L1 PM Substates
    Kernel driver in use: rtl8821ae
    Kernel modules: rtl8821ae

 

[Alwin]

It greatly depends on the driver support in Linux. You may need to install additional firmware as well.