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Bug #1804

Updated by neels over 7 years ago

On SysmoBTS as well as litecell15, osmo-bts works fine when no osmo-pcu is running. 

 However, if osmo-pcu has connected and the PCU process is then stopped (e.g. kill -2), 
 then the BTS phy is rendered completely unusable, even after a osmo-bts restart. 

 The normal osmo-bts-lc15 startup without a PCU looks like this: 

 <pre> 
 ((*)) 
   | 
  / \ OsmoBTS 
 <0012> input/ipaccess.c:876 enabling ipaccess BTS mode 
 <0006> phy_link.c:58 PHY link state change shutdown -> connectiong 
 <0006> l1_if.c:1417 Litecell 1.5 BTS L1IF compiled against API headers v1.0.0 
 <0006> l1_if.c:186 Tx SYS prim LAYER1-RESET.req 
 <0006> phy_link.c:58 PHY link state change connectiong -> connected 
 <0006> phy_link.c:68 trx_set_avail(1) 
 <0012> input/ipa.c:129 connection done. 
 <0012> input/ipaccess.c:700 received ID get 
 <0001> oml.c:217 OC=SITE-MANAGER INST=(ff,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=BTS INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-NSE INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-CELL INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,01,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=RADIO-CARRIER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=BASEBAND-TRANSCEIVER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,00) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,01) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,02) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,03) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,04) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,05) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,06) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,07) Tx STATE CHG REP 
 <0006> l1_if.c:1319 Rx L1-RESET.conf (status=Success) 
 <0006> l1_if.c:1356 Tx SET-TRACE-FLAGS.req (0x00000000) 
 <0006> l1_if.c:186 Tx SYS prim SYSTEM-INFO.req 
 <0006> l1_if.c:1281 DSP v1.0.0, FPGA v0.2.0 
 n<0006> l1_if.c:186 Tx SYS prim ACTIVATE-RF.req 
 <0006> calib_file.c:294 Calibration file path not specified 
 <0006> l1_if.c:1294 Operating without calibration; unable to load tables! 
 <0001> oml.c:547 Ignoring T200[0] (150 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[1] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[2] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[3] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[4] (520 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[5] (165 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[6] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:256 OC=BTS INST=(00,ff,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=BTS INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=BTS INST=(00,ff,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=BTS INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=GPRS-NSE INST=(00,ff,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=GPRS-NSE INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=GPRS-CELL INST=(00,ff,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=GPRS-CELL INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=GPRS-NSVC INST=(00,00,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:256 OC=GPRS-NSE INST=(00,ff,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=GPRS-NSE INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:256 OC=GPRS-CELL INST=(00,ff,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=GPRS-CELL INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:256 OC=GPRS-NSVC INST=(00,00,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:547 Ignoring T200[0] (150 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[1] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[2] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[3] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[4] (520 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[5] (165 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[6] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:901 ADM state already was Unlocked 
 <0006> l1_if.c:1128 Rx RF-ACT.conf (status=Success) 
 <0006> main.c:130 Set global status #0 to 1 (0000 -> 0001), LEDs: ACT 1 
 <0001> oml.c:249 OC=RADIO-CARRIER INST=(00,00,ff) AVAIL STATE Power off -> OK 
 <0001> oml.c:256 OC=RADIO-CARRIER INST=(00,00,ff) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=RADIO-CARRIER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:362 OC=RADIO-CARRIER INST=(00,00,ff) Tx SW ACT REP 
 <0001> oml.c:249 OC=BASEBAND-TRANSCEIVER INST=(00,00,ff) AVAIL STATE Power off -> OK 
 <0001> oml.c:217 OC=BASEBAND-TRANSCEIVER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:362 OC=BASEBAND-TRANSCEIVER INST=(00,00,ff) Tx SW ACT REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,00) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,00) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,00) Tx STATE CHG REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,01) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,01) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,01) Tx STATE CHG REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,02) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,02) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,02) Tx STATE CHG REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,03) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,03) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,03) Tx STATE CHG REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,04) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,04) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,04) Tx STATE CHG REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,05) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,05) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,05) Tx STATE CHG REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,06) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,06) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,06) Tx STATE CHG REP 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,07) AVAIL STATE Power off -> Dependency 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,07) OPER STATE NULL -> Disabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,07) Tx STATE CHG REP 
 <0001> oml.c:642 Set RF Max Power Reduction = 10 dBm 
 <0001> oml.c:901 ADM state already was Unlocked 
 <0006> l1_if.c:1251 Tx RF-MUTE.req (0, 0, 0, 0, 0, 0, 0, 0) 
 <0006> l1_if.c:186 Tx SYS prim MUTE-RF.req 
 <0006> l1_if.c:1225 Rx RF-MUTE.conf with status=Success 
 <0006> main.c:130 Set global status #1 to 0 (0001 -> 0001), LEDs: ACT 1 
 <0006> oml.c:417 Init TRX (Band 2, ARFCN 868, TSC 7, RxPower -75.000000 dBm, TxPower    0.00 dBm 
 <0006> oml.c:340 Rx MPH-INIT.conf (status=Success) 
 <0006> tx_power.c:248 power_ramp_start(cur=0, tgt=30000) 
 <0001> oml.c:249 OC=RADIO-CARRIER INST=(00,00,ff) AVAIL STATE OK -> OK 
 <0001> oml.c:256 OC=RADIO-CARRIER INST=(00,00,ff) OPER STATE Disabled -> Enabled 
 <0001> oml.c:217 OC=RADIO-CARRIER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:256 OC=BASEBAND-TRANSCEIVER INST=(00,00,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=BASEBAND-TRANSCEIVER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:1158 Rx IPA RSL CONNECT IP=10.9.1.120 PORT=3003 STREAM=0x00 
 <0012> input/ipa.c:129 connection done. 
 <0001> oml.c:834 OC=CHANNEL INST=(00,00,00) SET CHAN ATTR (TSC = 7) 
 <0012> input/ipaccess.c:700 received ID get 
 <0000> rsl.c:244 Tx RSL RF RESource INDication 
 <0001> oml.c:249 OC=CHANNEL INST=(00,00,00) AVAIL STATE Dependency -> OK 
 <0001> oml.c:256 OC=CHANNEL INST=(00,00,00) OPER STATE Disabled -> Enabled 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,00) Tx STATE CHG REP 
 <0006> oml.c:1048 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.req (hL2=0x000004bb, FCCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.conf (FCCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.req (hL2=0x000004bb, SCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.conf (SCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.req (hL2=0x000004bb, BCCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.conf (BCCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.req (hL2=0x000004bb, AGCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.conf (AGCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.req (hL2=0x000004bb, PCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.conf (PCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.req (hL2=0x000004bb, RACH RxUL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=0,ss=4) MPH-ACTIVATE.conf (RACH RxUL) 
 <0000> rsl.c:545 (bts=0,trx=0,ts=0,ss=0) Tx CHAN ACT ACK 
 <0006> oml.c:1384 (bts=0,trx=0,ts=0,ss=4) SET_CIPHERING (ALG=0 TxDL) 
 <0006> oml.c:749 (bts=0,trx=0,ts=0,ss=4) End of queue encountered. Now empty? 0 
 <0006> oml.c:1229 (bts=0,trx=0,ts=0,ss=4) MPH-CONFIG.conf (Configure ciphering params)  
 <0006> oml.c:1384 (bts=0,trx=0,ts=0,ss=4) SET_CIPHERING (ALG=0 RxUL) 
 <0006> oml.c:1229 (bts=0,trx=0,ts=0,ss=4) MPH-CONFIG.conf (Configure ciphering params)  
 <0006> oml.c:749 (bts=0,trx=0,ts=0,ss=4) End of queue encountered. Now empty? 1 
 [...] 
 <0009> pcu_sock.c:637 PCU socket not connected, dropping message 
 <0009> pcu_sock.c:637 PCU socket not connected, dropping message 
 <0009> pcu_sock.c:637 PCU socket not connected, dropping message 
 </pre> 


 Then when the osmo-pcu comes up, we see 

 <pre> 
 <0009> pcu_sock.c:637 PCU socket not connected, dropping message 
 <0009> pcu_sock.c:637 PCU socket not connected, dropping message 
 <0009> pcu_sock.c:834 PCU socket connected to external PCU 
 <0006> oml.c:1048 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.req (hL2=0x000200bb, PDTCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=3,ss=0) MPH-ACTIVATE.req (hL2=0x000300bb, PDTCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.conf (PDTCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.req (hL2=0x000200bb, PDTCH RxUL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=3,ss=0) MPH-ACTIVATE.conf (PDTCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=3,ss=0) MPH-ACTIVATE.req (hL2=0x000300bb, PDTCH RxUL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.conf (PDTCH RxUL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.req (hL2=0x000200bb, PTCCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=3,ss=0) MPH-ACTIVATE.conf (PDTCH RxUL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=3,ss=0) MPH-ACTIVATE.req (hL2=0x000300bb, PTCCH TxDL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.conf (PTCCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.req (hL2=0x000200bb, PRACH RxUL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=3,ss=0) MPH-ACTIVATE.conf (PTCCH TxDL) 
 <0006> oml.c:1048 (bts=0,trx=0,ts=3,ss=0) MPH-ACTIVATE.req (hL2=0x000300bb, PRACH RxUL) 
 <0006> oml.c:791 (bts=0,trx=0,ts=2,ss=0) MPH-ACTIVATE.conf (PRACH RxUL) 
 [...] 
 </pre> 

 And GPRS works. 
 (Note: no actual MS needs to be attached to reproduce the issue.) 

 When I then stop the PCU process by means of `kill -2', the BTS log says: 

 <pre> 
 <0009> pcu_sock.c:658 PCU socket has LOST connection 
 [wait some seconds] 
 <0006> oml.c:876 DSP L1 is no longer sending primitives! 
 </pre> 

 and at that point all logging stops and the RF cell goes down completely. 

 A restart of the osmo-bts process does not bring the RF cell back up, 
 and the log looks like: 

 <pre> 
 ((*)) 
   | 
  / \ OsmoBTS 
 <0012> input/ipaccess.c:876 enabling ipaccess BTS mode 
 <0006> phy_link.c:58 PHY link state change shutdown -> connectiong 
 <0006> l1_if.c:1417 Litecell 1.5 BTS L1IF compiled against API headers v1.0.0 
 <0006> l1_if.c:186 Tx SYS prim LAYER1-RESET.req 
 <0006> phy_link.c:58 PHY link state change connectiong -> connected 
 <0006> phy_link.c:68 trx_set_avail(1) 
 <0012> input/ipa.c:129 connection done. 
 <0012> input/ipaccess.c:700 received ID get 
 <0001> oml.c:217 OC=SITE-MANAGER INST=(ff,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=BTS INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-NSE INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-CELL INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,01,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=RADIO-CARRIER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=BASEBAND-TRANSCEIVER INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,00) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,01) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,02) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,03) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,04) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,05) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,06) Tx STATE CHG REP 
 <0001> oml.c:217 OC=CHANNEL INST=(00,00,07) Tx STATE CHG REP 
 <0001> oml.c:547 Ignoring T200[0] (150 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[1] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[2] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[3] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[4] (520 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[5] (165 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[6] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:256 OC=BTS INST=(00,ff,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=BTS INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=BTS INST=(00,ff,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=BTS INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=GPRS-NSE INST=(00,ff,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=GPRS-NSE INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=GPRS-CELL INST=(00,ff,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=GPRS-CELL INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:249 OC=GPRS-NSVC INST=(00,00,ff) AVAIL STATE Dependency -> OK 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:256 OC=GPRS-NSE INST=(00,ff,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=GPRS-NSE INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:256 OC=GPRS-CELL INST=(00,ff,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=GPRS-CELL INST=(00,ff,ff) Tx STATE CHG REP 
 <0001> oml.c:256 OC=GPRS-NSVC INST=(00,00,ff) OPER STATE NULL -> Enabled 
 <0001> oml.c:217 OC=GPRS-NSVC INST=(00,00,ff) Tx STATE CHG REP 
 <0001> oml.c:547 Ignoring T200[0] (150 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[1] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[2] (180 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[3] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[4] (520 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[5] (165 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:547 Ignoring T200[6] (1680 ms) as sent by BSC due to suspected LAPDm bug! 
 <0001> oml.c:901 ADM state already was Unlocked 
 [after a while] 
 <0006> l1_if.c:94 Timeout waiting for SYS primitive LAYER1-RESET.conf 
 </pre> 

 i.e. startup is not working out as above. 

 Can this be recovered from without a system reboot? 
 Can osmo-bts do this automagically?

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