ath12k wrong MCS rate in monitor-mode

[Jeff Johnson]

On 11/28/2025 12:02 AM, Frank Lindner wrote:
> Hi,
> 
> I am using ath12k devices, QCN9274 from Compex.
> In monitor-mode, all captured data-frames are saved with MCS3. 
> A parallel capture of ath10k device shows MCS7 or 15. 
> The captured data is a wifi4 or wifi5 traffic. 
> 
> Is there a fix available or is this firmware? 
> 
> Ubuntu 24.04
> Kernel 6.16.9-061609-generic
> 
> modinfo ath12k
> filename:       /lib/modules/6.16.9-061609-generic/kernel/drivers/net/wireless/ath/ath12k/ath12k.ko.zst
> license:        Dual BSD/GPL
> description:    Driver support for Qualcomm Technologies 802.11be WLAN devices
> srcversion:     555B1DBC205393C0C841332
> alias:          of:N*T*Cqcom,ipq5332-wifiC*
> alias:          of:N*T*Cqcom,ipq5332-wifi
> alias:          pci:v000017CBd00001107sv*sd*bc*sc*i*
> alias:          pci:v000017CBd00001109sv*sd*bc*sc*i*
> depends:        mac80211,cfg80211,qmi_helpers,mhi,qcom-scm
> intree:         Y
> name:           ath12k
> retpoline:      Y
> vermagic:       6.16.9-061609-generic SMP preempt mod_unload modversions
> sig_id:         PKCS#7
> signer:         Build time autogenerated kernel key
> sig_key:        5F:BC:19:FA:0D:D1:EC:87:49:67:38:43:F0:7C:3F:CA:9C:FE:51:03
> sig_hashalgo:   sha512
> signature:      6A:FF:EF:E1:BE:C6:46:C3:73:B3:15:B1:4A:B0:FB:9F:46:9F:BA:99:
>                 83:11:47:2B:7E:8F:88:36:B9:0B:BD:B9:6F:E1:53:6E:9C:BE:B5:AA:
>                 E0:FD:FA:98:62:DE:92:D1:7C:76:3E:FA:89:E0:7F:06:02:E4:F3:5F:
>                 D8:D7:85:17:D2:42:D8:21:45:7A:5E:C0:7A:FB:8C:38:14:44:32:9F:
>                 D9:C3:D2:1B:B1:60:9E:50:32:2A:B3:DA:36:C6:E4:06:29:D4:F2:58:
>                 0D:5D:98:08:A6:F6:D6:98:31:C9:AA:41:2A:80:7E:6B:46:0E:91:21:
>                 31:7C:2F:8E:77:78:02:72:72:17:61:17:46:F2:7E:D5:79:EC:5C:AA:
>                 29:04:51:83:75:A6:3F:66:6D:5D:4B:79:0F:CC:94:DF:F3:C1:94:CF:
>                 BE:A2:A4:5D:D2:C7:ED:68:3A:76:50:D4:BC:EF:17:02:AA:94:A4:DC:
>                 09:98:5F:5D:D0:60:55:64:F4:16:CC:B6:7B:18:DF:7F:8B:29:84:36:
>                 E6:88:5F:1F:DE:4D:40:EF:FE:A4:C1:C7:D5:EF:3C:59:BF:BF:47:70:
>                 03:DD:74:26:9F:03:7C:37:05:5A:DC:15:02:FF:40:E4:FE:E7:73:B0:
>                 DC:2A:EB:E1:43:2C:77:AC:53:BD:B7:80:C4:C7:E6:96:EB:A4:AD:FE:
>                 DF:25:DB:23:57:F0:3D:17:6B:7F:16:4C:4C:B7:1A:7A:EE:60:B0:B4:
>                 54:E6:C4:EC:EF:8C:0C:88:7E:6D:3D:D5:75:A5:6A:5D:AD:E6:53:6A:
>                 AE:5C:0B:DC:9A:24:1E:43:B4:15:1A:55:86:7C:0B:77:E6:1D:25:DD:
>                 37:E3:A9:81:D1:C5:0A:39:71:30:D1:05:3D:B9:75:66:33:9C:48:02:
>                 CD:B2:A1:8C:2C:64:4D:43:DC:AA:90:63:A6:D1:C6:24:28:8E:65:2F:
>                 5E:48:98:A0:05:2D:A3:3C:CE:48:E0:26:C3:E2:86:BC:37:2D:C2:70:
>                 BE:FF:56:50:94:92:48:AA:82:B0:C5:36:EF:9B:79:4E:2B:06:54:22:
>                 37:B6:F4:D8:48:21:41:33:83:89:E1:D5:FE:8F:78:EF:B7:65:48:3D:
>                 14:75:EB:82:96:FD:D0:FD:29:4D:5C:96:B1:1B:F4:E7:40:CA:FC:18:
>                 F5:39:89:7A:EC:76:E0:DC:84:3C:3A:C2:A7:CD:97:9B:2D:59:A5:67:
>                 A6:4A:F0:F5:B5:B9:C9:E9:AD:23:0B:36:22:62:E2:14:A6:3D:98:C1:
>                 A2:D6:DD:D9:43:05:5F:85:CE:36:D1:9E:20:94:47:24:E3:0D:51:D8:
>                 C2:55:11:CF:DC:B4:36:54:A4:60:71:91
> parm:           debug_mask:Debugging mask (uint)
> parm:           ftm_mode:Boots up in factory test mode (bool)

Can you please open a Bugzilla ticket per the guidance at:
https://wireless.docs.kernel.org/en/latest/en/users/drivers/ath12k/bugreport.html

Then we can assign the issue to an appropriate engineer.

Thanks!
/jeff