Hello,
I’m using a Quectel modem RM520N-EU on Ubuntu (with qmi_wwan), and encountering persistent issues when trying to start a data session. The error i am getting
error: couldn't start network: QMI protocol error (14): 'CallFailed'
call end reason (1): generic-unspecified
verbose call end reason (2,241): [internal] interface-in-use-config-match
[/dev/cdc-wdm0] Client ID not released:
Service: 'wds'
CID: '18'
Even after resetting the modem using replugging, and cleaning up WDS clients, the error persists. Moreover, In gnb logs it got the PDU
[NR_PHY] [o-du 0][rx 1131786240 pps 798720 kbps 6384025][tx 140022392 pps 98816 kbps 3342790][Total Msgs_Rcvd 1131786240]
[NR_PHY] [o_du0][pusch0 278593536 prach0 4353024]
[NR_PHY] [o_du0][pusch1 278593536 prach1 4353024]
[NR_PHY] [o_du0][pusch2 278593536 prach2 4353024]
[NR_PHY] [o_du0][pusch3 278593536 prach3 4353024]
[NR_MAC] Frame.Slot 256.0
UE RNTI e671 CU-UE-ID 1 in-sync PH 38 dB PCMAX 24 dBm, average RSRP -81 (32 meas)
UE e671: CQI 10, RI 2, PMI (0,1)
UE e671: dlsch_rounds 1227/0/0/0, dlsch_errors 0, pucch0_DTX 0, BLER 0.00000 MCS (1) 9
UE e671: ulsch_rounds 553445/6/3/1, ulsch_errors 1, ulsch_DTX 9, BLER 0.00000 MCS (0) 25 (Qm 6 deltaMCS 0 dB) NPRB 5 SNR 19.0 dB
UE e671: MAC: TX 533751 RX 47227560 bytes
UE e671: LCID 1: TX 2333 RX 16451 bytes
UE e671: LCID 2: TX 0 RX 0 bytes
UE e671: LCID 4: TX 0 RX 0 bytes
I have also tried disabling ModemManager to avoid conflicts, but the issue still persists.