NCM865 - Linux - Incredibly poor performance

[Baochen Qiang]

On 10/14/2025 6:55 PM, Ross Brown wrote:
> The NCM865 chipset suffers INCREDIBLY poor performance on Linux -
> usually about 1/10th of what adaptors from other vendors are able to
> achieve from the same AP and same machine, in the same location.
> 
> Fastfetch output:
>              .',;::::;,'.                 crystalyne at ross-framework-13
>          .';:cccccccccccc:;,.             ----------------------------
>       .;cccccccccccccccccccccc;.          OS: Fedora Linux
> 42.20251014.0 (Silverblue) x86_64
>     .:cccccccccccccccccccccccccc:.        Host: Laptop (AC)
>   .;ccccccccccccc;.:dddl:.;ccccccc;.      Kernel: Linux 6.16.11-200.fc42.x86_64

since you are using 6.16.11, can you try reverting 4b66d18918f8 ("wifi: ath12k: Fix
missing station power save configuration")?

>  .:ccccccccccccc;OWMKOOXMWd;ccccccc:.     Uptime: 33 seconds
> .:ccccccccccccc;KMMc;cc;xMMc;ccccccc:.    Packages: 1521 (rpm), 57 (flatpak)
> ,cccccccccccccc;MMM.;cc;;WW:;cccccccc,    Shell: bash 5.2.37
> :cccccccccccccc;MMM.;cccccccccccccccc:    Display (NE135A1M-NY1):
> 2880x1920 @ 120 Hz (as 1440x960) in 14" [Built-in]
> :ccccccc;oxOOOo;MMM000k.;cccccccccccc:    DE: GNOME 48.5
> cccccc;0MMKxdd:;MMMkddc.;cccccccccccc;    WM: Mutter (Wayland)
> ccccc;XMO';cccc;MMM.;cccccccccccccccc'    WM Theme: Adwaita
> ccccc;MMo;ccccc;MMW.;ccccccccccccccc;     Theme: Adwaita [GTK2/3/4]
> ccccc;0MNc.ccc.xMMd;ccccccccccccccc;      Icons: Adwaita [GTK2/3/4]
> cccccc;dNMWXXXWM0:;cccccccccccccc:,       Font: Adwaita Sans (11pt) [GTK2/3/4]
> cccccccc;.:odl:.;cccccccccccccc:,.        Cursor: Adwaita (24px)
> ccccccccccccccccccccccccccccc:'.          Terminal: Ptyxis 48.5
> :ccccccccccccccccccccccc:;,..             Terminal Font: Adwaita Mono (11pt)
>  ':cccccccccccccccc::;,.                  CPU: 11th Gen Intel(R)
> Core(TM) i7-1185G7 (8) @ 4.80 GHz
>                                           GPU: Intel Iris Xe Graphics
> @ 1.35 GHz [Integrated]
>                                           Memory: 2.61 GiB / 15.40 GiB (17%)
>                                           Swap: 0 B / 8.00 GiB (0%)
>                                           Disk (/): 21.36 MiB / 21.36
> MiB (100%) - overlay [Read-only]
>                                           Disk (/etc): 34.72 GiB /
> 491.06 GiB (7%) - btrfs
>                                           Local IP (wlp170s0): 192.168.8.191/24
>                                           Battery (Framewo): 44% (56
> mins remaining) [Discharging]
>                                           Locale: en_GB.UTF-8
> 
> AP Used for speedtest: GL-iNet Spitz AX X3000 (Performance degradation
> seen on all APs, not just this one)
> 
> NCM865 speedtest:
> speedtest-cli
> Retrieving speedtest.net configuration...
> Testing from toob (145.40.178.183)...
> Retrieving speedtest.net server list...
> Selecting best server based on ping...
> Hosted by YouFibre (London) [111.02 km]: 90.277 ms
> Testing download
> speed................................................................................
> Download: 35.88 Mbit/s
> Testing upload speed......................................................................................................
> Upload: 64.41 Mbit/s
> 
> Intel AX210 speedtest:
> speedtest-cli
> Retrieving speedtest.net configuration...
> Testing from toob (145.40.178.183)...
> Retrieving speedtest.net server list...
> Selecting best server based on ping...
> Hosted by YouFibre (London) [111.02 km]: 8.698 ms
> Testing download
> speed................................................................................
> Download: 551.98 Mbit/s
> Testing upload speed......................................................................................................
> Upload: 605.40 Mbit/s
> 
> Mediatek RZ616 speedtest:
> speedtest-cli
> Retrieving speedtest.net configuration...
> Testing from toob (145.40.178.183)...
> Retrieving speedtest.net server list...
> Selecting best server based on ping...
> Hosted by YouFibre (London) [111.02 km]: 8.932 ms
> Testing download
> speed................................................................................
> Download: 582.44 Mbit/s
> Testing upload speed......................................................................................................
> Upload: 618.28 Mbit/s
>