Bug: QCA9880 hw2.0: TX-Rate Display in Wireshark

Lindner, Frank Frank.Lindner at ghmt.de
Tue Feb 16 06:33:55 PST 2016


Hi there,

I'm using QCA980 hw2.0 (Compex WLE900VX5) in monitor mode. Using Linux Kernel 4.3.3 and ath10k firmware 10.2.4.70.19-2.
When capturing 2.4 GHz WIFI operating in 802.11g (1 to 54 Mbit/s), Wireshark displays only 1, 2, 5.5 or 11 Mbit/s as TX rate for the frames. When capturing in parallel with Airpcap on Windows or a Ralink-based card in monitor mode, frame TX rate is displayed correctly with 1 to 54 Mbit/s.
I also tried older firmware versions. Same issue.
Also when trying to capture with tcpdump, only up 11 Mbit/s is shown.
Is this a known issue?
Is there any fix for this?

iw phy phy0 info
Wiphy phy0
        Band 1:
                Capabilities: 0x19e3
                        RX LDPC
                        HT20/HT40
                        Static SM Power Save
                        RX HT20 SGI
                        RX HT40 SGI
                        TX STBC
                        RX STBC 1-stream
                        Max AMSDU length: 7935 bytes
                        DSSS/CCK HT40
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: 8 usec (0x06)
                HT TX/RX MCS rate indexes supported: 0-23
                Frequencies:
                        * 2412 MHz [1] (20.0 dBm)
                        * 2417 MHz [2] (20.0 dBm)
                        * 2422 MHz [3] (20.0 dBm)
                        * 2427 MHz [4] (20.0 dBm)
                        * 2432 MHz [5] (20.0 dBm)
                        * 2437 MHz [6] (20.0 dBm)
                        * 2442 MHz [7] (20.0 dBm)
                        * 2447 MHz [8] (20.0 dBm)
                        * 2452 MHz [9] (20.0 dBm)
                        * 2457 MHz [10] (20.0 dBm)
                        * 2462 MHz [11] (20.0 dBm)
                        * 2467 MHz [12] (20.0 dBm)
                        * 2472 MHz [13] (20.0 dBm)
                        * 2484 MHz [14] (disabled)
                Bitrates (non-HT):
                        * 1.0 Mbps
                        * 2.0 Mbps (short preamble supported)
                        * 5.5 Mbps (short preamble supported)
                        * 11.0 Mbps (short preamble supported)
                        * 6.0 Mbps
                        * 9.0 Mbps
                        * 12.0 Mbps
                        * 18.0 Mbps
                        * 24.0 Mbps
                        * 36.0 Mbps
                        * 48.0 Mbps
                        * 54.0 Mbps
        Band 2:
                Capabilities: 0x19e3
                        RX LDPC
                        HT20/HT40
                        Static SM Power Save
                        RX HT20 SGI
                        RX HT40 SGI
                        TX STBC
                        RX STBC 1-stream
                        Max AMSDU length: 7935 bytes
                        DSSS/CCK HT40
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: 8 usec (0x06)
                HT TX/RX MCS rate indexes supported: 0-23
                Frequencies:
                        * 5180 MHz [36] (20.0 dBm)
                        * 5200 MHz [40] (20.0 dBm)
                        * 5220 MHz [44] (20.0 dBm)
                        * 5240 MHz [48] (20.0 dBm)
                        * 5260 MHz [52] (23.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5280 MHz [56] (23.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5300 MHz [60] (23.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5320 MHz [64] (23.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5500 MHz [100] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5520 MHz [104] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5540 MHz [108] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5560 MHz [112] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5580 MHz [116] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5600 MHz [120] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5620 MHz [124] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5640 MHz [128] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5660 MHz [132] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5680 MHz [136] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5700 MHz [140] (30.0 dBm) (passive scanning, no IBSS, radar detection)
                        * 5720 MHz [144] (30.0 dBm) (radar detection)
                        * 5745 MHz [149] (30.0 dBm)
                        * 5765 MHz [153] (30.0 dBm)
                        * 5785 MHz [157] (30.0 dBm)
                        * 5805 MHz [161] (30.0 dBm)
                        * 5825 MHz [165] (30.0 dBm)
                Bitrates (non-HT):
                        * 6.0 Mbps
                        * 9.0 Mbps
                        * 12.0 Mbps
                        * 18.0 Mbps
                        * 24.0 Mbps
                        * 36.0 Mbps
                        * 48.0 Mbps
                        * 54.0 Mbps
        max # scan SSIDs: 16
        max scan IEs length: 195 bytes
        Coverage class: 0 (up to 0m)
        Supported Ciphers:
                * WEP40 (00-0f-ac:1)
                * WEP104 (00-0f-ac:5)
                * TKIP (00-0f-ac:2)
                * CCMP (00-0f-ac:4)
                * CMAC (00-0f-ac:6)
        Available Antennas: TX 0x7 RX 0x7
        Configured Antennas: TX 0x7 RX 0x7
        Supported interface modes:
                 * managed
                 * AP
                 * AP/VLAN
                 * monitor
        software interface modes (can always be added):
                 * AP/VLAN
                 * monitor
        valid interface combinations:
                 * #{ AP } <= 8,
                   total <= 8, #channels <= 1, STA/AP BI must match
        Supported commands:
                 * new_interface
                 * set_interface
                 * new_key
                 * new_beacon
                 * new_station
                 * new_mpath
                 * set_mesh_params
                 * set_bss
                 * authenticate
                 * associate
                 * deauthenticate
                 * disassociate
                 * join_ibss
                 * join_mesh
                 * remain_on_channel
                 * set_tx_bitrate_mask
                 * action
                 * frame_wait_cancel
                 * set_wiphy_netns
                * set_channel
                 * set_wds_peer
                 * Unknown command (84)
                 * Unknown command (87)
                 * Unknown command (85)
                 * Unknown command (89)
                 * Unknown command (92)
                 * connect
                 * disconnect
        Supported TX frame types:
                 * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
                 * Unknown mode (10): 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
        Supported RX frame types:
                 * IBSS: 0x40 0xb0 0xc0 0xd0
                 * managed: 0x40 0xd0
                 * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
                 * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
                 * mesh point: 0xb0 0xc0 0xd0
                 * P2P-client: 0x40 0xd0
                 * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
                 * Unknown mode (10): 0x40 0xd0
        Device supports RSN-IBSS.
        Device supports AP-side u-APSD.
        HT Capability overrides:
                 * MCS: ff ff ff ff ff ff ff ff ff ff
                 * maximum A-MSDU length
                 * supported channel width
                 * short GI for 40 MHz
                 * max A-MPDU length exponent
                 * min MPDU start spacing
        Device supports TX status socket option.
        Device supports HT-IBSS.


dmesg:
[    4.135577] ath10k_pci 0000:11:00.0: qca988x hw2.0 (0x4100016c, 0x043202ff) fw 10.2.4.70.19-2 api 5 htt-ver 2.1 wmi-op 5 htt-op 2 cal otp max-sta 128 raw 0 hwcrypto 1 features no-p2p,raw-mode
[    4.135582] ath10k_pci 0000:11:00.0: debug 0 debugfs 1 tracing 1 dfs 0 testmode 0
[    4.280056] ath: EEPROM regdomain: 0x0
[    4.280058] ath: EEPROM indicates default country code should be used
[    4.280059] ath: doing EEPROM country->regdmn map search
[    4.280065] ath: country maps to regdmn code: 0x3a
[    4.280065] ath: Country alpha2 being used: US
[    4.280066] ath: Regpair used: 0x3a
[    4.402764] cfg80211: Current regulatory domain intersected:
[    4.402769] cfg80211:  DFS Master region: unset
[    4.402770] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[    4.402771] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[    4.402773] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[    4.402778] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz), (N/A, 2300 mBm), (0 s)
[    4.402779] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 3000 mBm), (0 s)
[    4.402780] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 3000 mBm), (N/A)

Best Regards,
Frank



Vorstandsvorsitzender: Dipl.-Ing. Dirk Wilhelm
Aufsichtsratsvorsitzender: Dr.-Ing. Peter Hasse
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