How to reset a miniPCI 3G-modem card?

sputniki · Mon May 31, 2010 11:16 am

Does anyone know how to reset a Sierra MC8775 (or probably any PCI-device on Routerboard)?
Rebooting of the Routerboard (RB411U) itself is done very well, but the modem card seems to hang even after watchdog-reboot. Disconnecting the Routerboard from power supply is (for us at the moment) the only way to get the frozen modem card working again, but hands-on is not possible because there is no physical access.

Mon May 31, 2010 1:54 pm

Do you have any other card to test?
If you have the same problem with another card (the same model), contact MikroTik support (support@mikrotik.com).

sputniki · Mon May 31, 2010 7:40 pm

This is not a problem of the RB I think. There may several reasons the Sierra MC8775 hangs. At first we experienced problems after AT+CFUN=1 (for activating this cards). Some (but not all) MC8775-cards needed a Routerboard-power-off-cycle after thats.
This wouldn't be the worst but roaming between two mobile-cells (with poor signal strength) may cause a card-hang too. This is what we believe could be the reason because those RB411U (with bad RSSI) are rebooting continously with watchdog-reset but only go online again after they got one power-off-cycle.

huangtenglang · Thu Jun 03, 2010 3:08 pm

I have the same problem.

sputniki · Thu Jun 10, 2010 10:10 am

I have the same problem.

So we could use external watchdog hardware to turn off power supply for the Mikrotik Router. But that would be the worst case for us - meaning additional hardware for every station...

lordcoke · Thu Jun 10, 2010 10:30 am

Hi,
have the same problem. The sierra wireless mc8775 sometimes just hangs. I also have seen on some RB411u's with this card that the serial port usb2 disappeared. /port print shows in this state just serial0. and the log says

Jan/02/1970 01:03:49 async,ppp,info ppp-out1: initializing...
Jan/02/1970 01:03:49 async,ppp,info ppp-out1: reseting link...
Jan/02/1970 01:03:49 async,ppp,info ppp-out1: reseting link... - could not acquire serial port
Jan/02/1970 01:03:50 async,ppp,info ppp-out1: disconnected
Jan/02/1970 01:04:00 async,ppp,info ppp-out1: initializing...
Jan/02/1970 01:04:00 async,ppp,info ppp-out1: reseting link...
Jan/02/1970 01:04:00 async,ppp,info ppp-out1: reseting link... - could not acquire serial port
and so on.

I've tried the mc8775 firmwares h1_8, h1_1_9_3 and h2_0_8_19 - it's always the same.

leequince · Thu Jun 17, 2010 2:49 am

Hi,

We have exactly the same issue....

After a period the 8775 cards lock up, then watchdog reset no longer works.. We have 5 411AH routers in test with 4.9 and 4.10 firmware.. Just looking up the boards.

With our ALIX/USB Dongle solution when the watchdog reboots the router it power cycles the USB.. Im wondering if actually happens with the 411AH??? I mean a power down of the minipci slot.??

There is a AT command, AT!RESET or AT!GRESET the only problem is I have no worked out how to get a script to issue this command and then reboot the router or on startup??

Regards

Lee

lordcoke · Sun Jun 20, 2010 6:26 pm

If you do an AT!GRESET to the MC8775 the 3G-Modem-card goes way for a second and comes up again with another device name in /dev. This causes a Kernel-Oops in RouterOS 4.x in certain circumstances.

odie · Sun Jun 20, 2010 7:47 pm

i think i have the same problem here with a usb huawei E169 as long it is connected to 1 cell it works
on changeing between cells it seems to hung up
only powercycle helps - watchdog doesnb not !
first i thougt the powersupply on the usb port is not strong enough but now i am not so sure anymore...

lordcoke · Mon Jun 28, 2010 7:11 pm

here the kernel oops in 4.10

AT!GRESET
OK
Oops[#1]:
Cpu 0
$ 0   : 00000000 1000de01 00000000 00000001
$ 4   : c05ca800 c1acfe00 c1f73b80 c05ca890
$ 8   : c03233e0 0000de00 00000000 c1df4000
$12   : c037db50 00000000 0007762c 00010000
$16   : c1fd4f00 00000000 c1acfe3c c1acfe00
$20   : c05ca800 c1aee410 00000002 0040196c
$24   : 00000000 2ab8f4e0
$28   : c0456000 c0457d58 7fc53a68 c1ad0a60
Hi    : 00000004
Lo    : 2370bf90
epc   : c1aecb20 init_module+0x3b20/0x4260 [sierra]
    Tainted: P
ra    : c1ad0a60 usb_serial_put+0x114/0x2fc [usbserial]
Status: 1000de03    KERNEL EXL IE
Cause : 0080000c
BadVA : 00000024
PrId  : 00019374 (MIPS 24K)
Process telser (pid: 905, threadinfo=c0456000, task=c1c5de68, tls=00000000)
Stack : 00000000 c1e14650 00000001 c011ec98 c1acfe00 c1fd4f00 c1acfe3c c05ca800
        c1f73b80 c1ad0a60 c021ded8 c1e10e70 c0457e00 c1e14664 c05ca800 00000000
        c09615f0 00000000 c1cf6400 c0376e30 c021e1c8 c021e028 c1e14638 c1e10700
        c0141924 c0457e40 c0376e30 c0181fc4 7fffffff 80000000 00000055 ffffffff
        c1c5f8a8 c037db80 c011f954 c011f954 c1f73500 00000010 c180a000 c1801700
        ...
Call Trace:
[<c1aecb20>] init_module+0x3b20/0x4260 [sierra]
[<c1ad0a60>] usb_serial_put+0x114/0x2fc [usbserial]


Code: 0c04996f  24c6d31c  8e710168 <ae200024> ae200028  8e020000  10400012  261
---[ end trace 3acf356183d6b017 ]---
Fixing recursive fault but reboot is needed!
hub 2-0:1.0: unable to enumerate USB device on port 2
usb 1-2: new full speed USB device using rb400-ohci and address 4
usb 1-2: configuration #1 chosen from 1 choice
sierra 1-2:1.0: Sierra USB modem converter detected
usb 1-2: Sierra USB modem converter now attached to ttyUSB3
usb 1-2: Sierra USB modem converter now attached to ttyUSB4
usb 1-2: Sierra USB modem converter now attached to ttyUSB5

How to reset a miniPCI 3G-modem card?

How to reset a miniPCI 3G-modem card?

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