Hi GL.iNet community,
I’m hoping someone here can help me diagnose a serious performance problem on my GL-X3000 “Spitz AX” router.
What happened
- Before the update – The internal CAT19 LTE modem regularly delivered ~200 Mbps download (same SIM, carrier, location, and signal).
- After updating the modem firmware – Download now maxes out at 70-100 Mbps (uploads dropped proportionally). The speed loss is consistent and reproducible across multiple test spots, including outdoors with very strong signal. Reboots, modem resets, and fresh APN settings make no difference.
Current setup
- Router firmware: latest v4.x release
- Mode: Router mode, cellular WAN only
- Modem bands: LTE Bands 3/7/20 active; 5G NR bands n1/n28/n78 enabled (though I’m on LTE only)
- No other config changes besides the modem-FW upgrade
Logs from the last 3-4 days
gl_modemkilled by OOM: repeated “gl_modem invoked oom-killer” entries suggest a memory leak in the new firmware/drivers.- Timeouts talking to the modem: log lines like
arduino
KopiujEdytuj
modem.get_traffic_config fail: connect "127.0.0.1:80" fail: timeout
point to intermittent loss of contact with the modem’s internal API.
- No such errors pre-update. Everything else on the router seems stable; only the modem side is misbehaving.
What I’ve tried
- Full power-cycle, factory reset of router settings (kept modem FW)
- Verified no new QoS / bandwidth caps in the GUI
- Swapped SIM into a phone – phone still hits 200 Mbps, so the carrier signal is fine
Possible fix – roll back modem firmware?
The stock (factory) modem firmware never had these issues. Unfortunately I don’t know its version number and can’t locate it on the download page. Can anyone tell me if it’s possible to flash the factory modem firmware, or share guidance / files to do a rollback safely?
Modem serial (from AT logs): 016442004897324
Any advice, experiences with similar speed drops, or pointers from GL.iNet staff would be greatly appreciated!
Thanks in advance.
Ps.
Log:
root@GL-X3000:~# picocom /dev/ttyUSB2
picocom v3.1
port is : /dev/ttyUSB2
flowcontrol : none
baudrate is : 9600
parity is : none
databits are : 8
stopbits are : 1
escape is : C-a
local echo is : no
noinit is : no
noreset is : no
hangup is : no
nolock is : no
send_cmd is : sz -vv
receive_cmd is : rz -vv -E
imap is :
omap is :
emap is : crcrlf,delbs,
logfile is : none
initstring : none
exit_after is : not set
exit is : no
Type [C-a] [C-h] to see available commands
Terminal ready
+QENDC: 0
OK
+QNWCFG: "disable_lte_ca",0
OK
+QNWCFG: "disable_nr_ca",0
OK
+QNWPREFCFG: "lte_band",1:2:3:4:5:7:8:12:13:14:17:18:19:20:25:26:28:29:30:32:34:38:39:40:41:42:43:46:48:66:71
OK
+QNWPREFCFG: "nr5g_band",1:2:3:5:7:8:12:13:14:18:20:25:26:28:29:30:38:40:41:48:66:70:71:75:76:77:78:79
OK
+QNWPREFCFG: "nsa_nr5g_band",1:2:3:5:7:8:12:13:14:18:20:25:26:28:29:30:38:40:41:48:66:70:71:75:76:77:78:79
OK
+QNWCFG: "dis_4mimo_enable",1
OK
+QNWCFG: "nr5g_4mimo_enable",1
OK
+QNWCFG: "nr5g_ul_256qam",0,0
OK
+QNWCFG: "lte_cdrx",1,1
OK
+QNWCFG: "nr5g_cdrx",1
OK
+QNWPREFCFG: "rat_acq_order",NR5G:LTE:WCDMA
OK
ERROR
+QNWCFG: "nr5g_mimo",1,3
OK
+QNWCFG: "lte_ulMCS",0
OK
+QNWCFG: "dss_enable",1
OK
+QNWINFO: "FDD LTE","26003","LTE BAND 7",3025
+QNWINFO: "FDD NR5G","26003","NR5G BAND 1",423410
OK
+QCAINFO: "PCC",3025,75,"LTE BAND 7",1,444,-98,-14,-61,11
+QCAINFO: "SCC",423410,2,"NR5G BAND 1",444,-87,-11,1781
OK
+QENDC: 0
OK
+QTEMP:"modem-lte-sub6-pa1","44"
+QTEMP:"modem-sdr0-pa0","0"
+QTEMP:"modem-sdr0-pa1","0"
+QTEMP:"modem-sdr0-pa2","0"
+QTEMP:"modem-sdr1-pa0","0"
+QTEMP:"modem-sdr1-pa1","0"
+QTEMP:"modem-sdr1-pa2","0"
+QTEMP:"modem-mmw0","0"
+QTEMP:"aoss-0-usr","44"
+QTEMP:"cpuss-0-usr","44"
+QTEMP:"mdmq6-0-usr","44"
+QTEMP:"mdmss-0-usr","44"
+QTEMP:"mdmss-1-usr","43"
+QTEMP:"mdmss-2-usr","44"
+QTEMP:"mdmss-3-usr","44"
+QTEMP:"modem-lte-sub6-pa2","43"
+QTEMP:"modem-ambient-usr","44"
OK
+QCSQ: "LTE",-69,-99,17,-11
OK
+QSINR: 8,-32768,-32768,-32768,LTE
+QSINR: 18,19,20,19,NR5G
OK
+QRSRP: -99,-140,-140,-140,LTE
+QRSRP: -86,-86,-88,-87,NR5G
OK
+QNWPREFCFG: "mode_pref",AUTO
OK
+QCFG: "pcie/mode",0
OK
+QNWCFG: "nr5g_ulbw",1,1,2
OK
+QNWCFG: "nr5g_ulTBsize",0
OK
+QCFG: "lte/bandprior",03,07,20
OK
+QCFG: "rrc",5
OK
+QCFG: "hsdpacat",24
OK
+CGPIAF: 0,0,0,0
OK
+QNWCFG: "lapi",0
OK
+C5GREG: 0,0
OK
+CEREG: 0,1
OK
+QNWCFG: "ctrl_plane_dly",1,"LTE",0
OK
+QNWCFG: "nr5g_mimo_layers",1,2
OK
+QENG: "servingcell","NOCONN"
+QENG: "LTE","FDD",260,03,3AC721F,444,3025,7,4,4,D314,-103,-12,-72,13,12,210,-
+QENG: "NR5G-NSA",260,03,444,-85,23,-3,423410,1,2,0
OK
+QSCAN: "LTE",260,03,3025,444,-100,-10,24,118
+QSCAN: "LTE",260,03,6200,381,-83,-18,45,110
+QSCAN: "LTE",260,03,6350,381,-81,-10,47,9
+QSCAN: "LTE",260,02,6350,381,-81,-10,47,9
+QSCAN: "LTE",260,03,1749,444,-96,-11,32,116
+QSCAN: "LTE",260,03,1599,444,-97,-6,31,8
+QSCAN: "LTE",260,02,1599,444,-97,-6,31,8
+QSCAN: "LTE",260,06,1474,193,-93,-6,35,12
+QSCAN: "LTE",260,03,3175,444,-102,-10,23,8
+QSCAN: "LTE",260,02,3175,444,-102,-10,23,8
+QSCAN: "LTE",260,01,1300,77,-100,-14,28,115
+QSCAN: "LTE",260,03,75,444,-92,-15,37,114
+QSCAN: "LTE",260,03,225,444,-98,-11,31,6
+QSCAN: "LTE",260,02,225,444,-98,-11,31,6
+QSCAN: "LTE",260,06,525,193,-97,-7,31,11
+QSCAN: "LTE",260,01,2850,317,-108,-13,21,115
+QSCAN: "LTE",260,06,6275,193,-81,-10,45,7
+QSCAN: "LTE",260,03,3686,444,-83,-8,45,11
+QSCAN: "LTE",260,02,3686,444,-83,-8,45,11
+QSCAN: "LTE",260,01,3526,496,-75,-12,49,115
+QSCAN: "LTE",260,06,3350,287,-135,-24,-7,104
OK
+QNWCFG: "ssb_beam_id",1,2,2,-85,-11,444
OK
+QNWCFG: "event_a3_offset",1,5
OK
+QNWCFG: "3gpp_rel",R15,R15
OK
OK
+QNWLOCK: "common/4g",(0-10),,
+QNWLOCK: "common/5g",,,,
+QNWLOCK: "save_ctrl",(0,1),(0,1)
+QNWLOCK: "common/4g_ext",<num_of_cells>,<cell_list>
OK
OK
Quectel
OK
RM520N-GL
OK
+CPIN: READY
OK