GPRS on Ettus B210 hardware

Hello everyone, I'm trying to setup OpenBSC to use GPRS on Ettus hardware with (B210). I followed what's written here more or less: https://osmocom.org/projec ts/cellular-infrastructure/wiki/OpenBSC_GPRS however for some reason I cannot get this to work. This is the first time that I try to setup GPRS with OpenBSC and even though I have a lot of experience working with OpenBSC for 2G stuff, this time I cannot figure out what's wrong. Here's the log from osmo-bts-trx when osmo-pcu connects: <0001> oml.c:76 Sending PCU version report to BSC: 0.4.0.2-bfc5 <0009> pcu_sock.c:336 Sending data indication: sapi=BCCH arfcn=0 block=0 data=01 06 00 90 00 19 5a 6f c9 e0 84 10 ab 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b <0009> pcu_sock.c:588 Activate request received: TRX=0 TX=2 <0000> rsl.c:669 (bts=0,trx=0,ts=2,ss=0) not sending CHAN ACT ACK <0009> pcu_sock.c:588 Activate request received: TRX=0 TX=3 <0000> rsl.c:669 (bts=0,trx=0,ts=3,ss=0) not sending CHAN ACT ACK <0009> pcu_sock.c:588 Activate request received: TRX=0 TX=4 <0000> rsl.c:669 (bts=0,trx=0,ts=4,ss=0) not sending CHAN ACT ACK <0009> pcu_sock.c:588 Activate request received: TRX=0 TX=5 <0000> rsl.c:669 (bts=0,trx=0,ts=5,ss=0) not sending CHAN ACT ACK <0009> pcu_sock.c:588 Activate request received: TRX=0 TX=6 <0000> rsl.c:669 (bts=0,trx=0,ts=6,ss=0) not sending CHAN ACT ACK <0009> pcu_sock.c:588 Activate request received: TRX=0 TX=7 <0000> rsl.c:669 (bts=0,trx=0,ts=7,ss=0) not sending CHAN ACT ACK <0009> pcu_sock.c:307 Sending rts request: is_ptcch=0 arfcn=0 block=0 <0009> pcu_sock.c:487 Data request received: sapi=PDTCH arfcn=514 block=0 data=47 94 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b <0009> pcu_sock.c:307 Sending rts request: is_ptcch=0 arfcn=0 block=1 <0009> pcu_sock.c:487 Data request received: sapi=PDTCH arfcn=514 block=1 data=47 94 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b <0009> pcu_sock.c:307 Sending rts request: is_ptcch=0 arfcn=0 block=2 <0009> pcu_sock.c:487 Data request received: sapi=PDTCH arfcn=514 block=2 data=47 94 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b <0009> pcu_sock.c:307 Sending rts request: is_ptcch=1 arfcn=1 block=0 <0009> pcu_sock.c:487 Data request received: sapi=PTCCH arfcn=1 block=0 data=2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b <0009> pcu_sock.c:307 Sending rts request: is_ptcch=0 arfcn=0 block=3 <0009> pcu_sock.c:487 Data request received: sapi=PDTCH arfcn=514 block=3 data=47 94 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b <0009> pcu_sock.c:307 Sending rts request: is_ptcch=0 arfcn=0 block=4 <0009> pcu_sock.c:487 Data request received: sapi=PDTCH arfcn=514 block=4 data=47 94 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b the last part (Sending rts request: ...) just repeats over and over. Here's the log from osmo-pcu: <000b> telnet_interface.c:101 telnet at 127.0.0.1 4240 <0001> osmobts_sock.cpp:229 Opening OsmoPCU L1 interface to OsmoBTS <0001> osmobts_sock.cpp:288 osmo-bts PCU socket /tmp/pcu_bts has been connected <0001> osmobts_sock.cpp:292 Sending version 0.4.0.2-bfc5 to BTS. <0001> pcu_l1_if.cpp:107 Sending 0.4.0.2-bfc5 TXT as PCU_VERSION to BTS <0001> pcu_l1_if.cpp:427 BTS available <0008> gprs_ns.c:263 NSVCI=65534 Creating NS-VC <0008> gprs_ns.c:1619 Listening for nsip packets from 127.0.0.1:23000 on 0.0.0.0:23000 <0008> gprs_ns.c:1638 NS UDP socket at 0.0.0.0:23000 <0008> gprs_ns.c:263 NSVCI=1800 Creating NS-VC <0008> gprs_ns.c:1656 NSEI=1800 RESET procedure based on API request <0008> gprs_ns.c:446 NSEI=1800 Tx NS RESET (NSVCI=1800, cause=O&M intervention) <0001> pcu_l1_if.cpp:119 Sending activate request: trx=0 ts=2 <0001> pcu_l1_if.cpp:554 PDCH: trx=0 ts=2 <0001> pcu_l1_if.cpp:119 Sending activate request: trx=0 ts=3 <0001> pcu_l1_if.cpp:554 PDCH: trx=0 ts=3 <0001> pcu_l1_if.cpp:119 Sending activate request: trx=0 ts=4 <0001> pcu_l1_if.cpp:554 PDCH: trx=0 ts=4 <0001> pcu_l1_if.cpp:119 Sending activate request: trx=0 ts=5 <0001> pcu_l1_if.cpp:554 PDCH: trx=0 ts=5 <0001> pcu_l1_if.cpp:119 Sending activate request: trx=0 ts=6 <0001> pcu_l1_if.cpp:554 PDCH: trx=0 ts=6 <0001> pcu_l1_if.cpp:119 Sending activate request: trx=0 ts=7 <0001> pcu_l1_if.cpp:554 PDCH: trx=0 ts=7 <0008> gprs_ns.c:887 NSVCI=1800 Rx NS RESET (NSEI=1800, NSVCI=1800, cause=O&M intervention) <0008> gprs_ns.c:707 NSEI=1800 Tx NS RESET ACK (NSVCI=1800) <0008> gprs_ns.c:995 NSVCI=1800 Rx NS RESET ACK (NSEI=1800, NSVCI=1800) <0008> gprs_ns.c:1004 NS RESET ACK Discarding unexpected message for NS-VCI 1800 from SGSN NSEI=1800 <0008> gprs_ns.c:555 NSEI=1800 Tx NS UNBLOCK (NSVCI=1800) <0008> gprs_ns.c:1411 NSEI=1800 Rx NS UNBLOCK <000a> gprs_bssgp_pcu.cpp:541 NS-VC 1800 is unblocked. <0009> gprs_bssgp_pcu.cpp:820 Sending reset on BVCI 0 <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=0) Tx BVC-RESET CAUSE=O&M intervention <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention <0008> gprs_ns.c:1417 NSEI=1800 Rx NS UNBLOCK ACK <0009> gprs_bssgp_pcu.cpp:299 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK <0009> gprs_bssgp_pcu.cpp:828 Sending reset on BVCI 1800 <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention <0009> gprs_bssgp.c:301 Cell 901-70-1-0 CI 0 on BVCI 1800 <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention <0009> gprs_bssgp.c:301 Cell 901-70-1-0 CI 0 on BVCI 1800 <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention <0009> gprs_bssgp_pcu.cpp:299 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK <0009> gprs_bssgp_pcu.cpp:836 Sending unblock on BVCI 1800 <0009> gprs_bssgp_bss.c:270 BSSGP (BVCI=1800) Tx BVC-BLOCK <0009> gprs_bssgp.c:301 Cell 901-70-1-0 CI 0 on BVCI 1800 <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention <0009> gprs_bssgp_pcu.cpp:299 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK <0009> gprs_bssgp_pcu.cpp:836 Sending unblock on BVCI 1800 <0009> gprs_bssgp_bss.c:270 BSSGP (BVCI=1800) Tx BVC-BLOCK <0009> gprs_bssgp.c:301 Cell 901-70-1-0 CI 0 on BVCI 1800 <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention <0009> gprs_bssgp_pcu.cpp:349 Rx BSSGP BVCI=0 (SIGN) PDU type BVC- UNBLOCK unknown <0009> gprs_bssgp_util.c:236 BSSGP BVCI=0 Tx STATUS, cause=Protocol error - unspecified <0009> gprs_bssgp_pcu.cpp:299 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK <0009> gprs_bssgp_pcu.cpp:836 Sending unblock on BVCI 1800 <0009> gprs_bssgp_bss.c:270 BSSGP (BVCI=1800) Tx BVC-BLOCK <0009> gprs_bssgp.c:301 Cell 901-70-1-0 CI 0 on BVCI 1800 <0009> gprs_bssgp_bss.c:290 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention <0009> gprs_bssgp_pcu.cpp:349 Rx BSSGP BVCI=0 (SIGN) PDU type BVC- UNBLOCK unknown <0009> gprs_bssgp_util.c:236 BSSGP BVCI=0 Tx STATUS, cause=Protocol error - unspecified <0009> gprs_bssgp_pcu.cpp:299 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK and like osmo-bts-trx, the last part (Sending unblock ...) repeats forever. Basically the two processes are stuck like these and nothing works, only 2G. The other components (ggsn, osmo-sgsn and osmo-nitb) seems to be fine, I'm not getting any error output in the their logs. The configuration should be fine, I just followed the mentioned link and all the components can talk to each other, so it's not an ip/port issue on my local system. Any help in this would be appreciated. Reading this ML seems like GPRS works for everyone except me...might be related to Ettus B210, I don't know to be honest, but I had no issue so far with OpenBSC and 2G. Eventually I can debug the source and provide more information if required. Everything was built from latest git repositories, might be related to recent split in osmo-nitb and gprs? Thanks for your help! Lorenzo