Problem with QMOD, Telit Modem and ofono

Hello list, I seem to be hitting a strange problem trying to use a sysmoQMOD with Ofono and a Telit Modem (HE910) There seems to be a window of around 30 seconds after starting osmo-remsim-client-st2 whereby ofono cannot talk to the modem. There is no response to any AT commands on either the Modem or the Aux port. After about 30 to 40 secs AT commands start working again and I can enable the modem. It seems that switching from physical SIM to remote SIM causes the modem to lock-up for a while. Anyone else seeing a similar issue? I've upgraded the firmware to the latest (0.5.1.24-bb9b0) but it make no difference. Regards Alan Here is a debug log of the firmware with my notes: .... *Power on board* .... ============================================================================= SIMtrace2 firmware 0.5.1.24-bb9b0 (C) 2010-2016 by Harald Welte ============================================================================= -I- Chip ID: 0x28900960 (Ext 0x00000000) -I- Serial Nr. 51203120-39513450-32303031-32333037 -I- Reset Cause: general reset (first power-up reset) -I- Detected Quad-Modem ST12 -I- VERSION_DET ADC=3731 => 3003455 uVund -I- USB init... USBD_Init Std gDesc Dev Std sAddr SetAddr(16) Std gDesc Dev Std gDesc Qua -W- Sta 0x888A8. -I- calling init of config 1... -I- 536881924: CLK activateda work-around -I- Modem 0: physical SIM -I- 0: Use local/physical SIM -I- Modem 1: physical SIM -I- 1: Use local/physical SIM -I- entering main loop... -I- 0: Card Detect Status -1 -> 0 -I- 1: Card Detect Status -1 -> 0 -I- USB is now configured -I- 1: VCC activated -I- 1: CLK activated -I- 1: CLK deactivated -I- 1: VCC deactivated -I- 1: VCC activated -I- 1: CLK activated -I- 1: CLK deactivated -I- 1: VCC deactivated -I- 0: VCC activated -I- 0: CLK activated -I- 0: CLK deactivated -I- 0: VCC deactivated -I- 0: VCC activated -I- 0: CLK activated -I- 0: CLK deactivated -I- 0: VCC deactivated ... *AT commands working fine here* ... Start osmo-remsim-client-st2 ..... Std sInterface -W- Sta 0x88828 [0] -W- _ Std cFeat Hlt Std cFeat Hlt Std cFeat D -I- Modem 0: virtual SIM -I- 0: Use remote/emulated SIM -I- 0: ATR set: 3b 00 -I- 0: Asserting modem reset -I- 0: De-asserting modem reset -I- 0: RST released -I- 0: RST asserted -I- 0: VCC activated -I- 0: CLK activated -I- 0: RST released -I- 0: computed Fi(1) Di(1) ratio: 372 -I- 0: send_tpdu_header: 00 a4 00 0c 02 -I- 0: flush_rx_buffer (5) -I- 0: flush_rx_buffer (2) ... *AT commands no longer work, no response to AT[CR]* ... NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNd -I- 0: CLK deactivated -I- 0: VCC deactivated -I- 0: RST released -I- 0: RST asserted -I- 0: VCC activated -I- 0: CLK activated -I- 0: RST released -I- 0: computed Fi(1) Di(1) ratio: 372 -I- 0: send_tpdu_header: 00 a4 00 0c 02 -I- 0: flush_rx_buffer (5) -I- 0: flush_rx_buffer (2) ... *AT commands still not working* ... NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNd -I- 0: CLK deactivated -I- 0: VCC deactivated -I- 0: RST released -I- 0: RST asserted -I- 0: VCC activated -I- 0: CLK activated -I- 0: RST released -I- 0: computed Fi(1) Di(1) ratio: 372 -I- 0: send_tpdu_header: 00 a4 00 0c 02 -I- 0: flush_rx_buffer (5) ... *AT Commands start working again here* ... NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNd