[Ovmsdev] Modem link-drop crash

[Tom Parker]

On 27/12/17 15:11, Mark Webb-Johnson wrote:

> Weird. Looks like the MUX has failed…

I took it for a short drive with a laptop logging. The network 
communication was not great with quite often a lot of lag to updates in 
the app. However I couldn't reproduce exactly the state that I 
"normally" see. What I did find was a stack overflow with a fairly 
disappointing stack trace:

D (1254884) gsm-mux: ProcessFrame(CHAN=2, ADDR=09, CTRL=ff, FCS=45, LEN=51)
D (1254884) gsm-mux: ChanProcessFrame(CHAN=2, ADDR=09, CTRL=ff, LEN=48, 
IFP=3)
D (1254884) SIMCOM ppp rx: 7e 21 45 00 00 28 4f 63 40 00 2d 06 24 44 bc 
8a ~!E..(Oc at .-.$D..
D (1254884) SIMCOM ppp rx: 4b e5 0a aa c7 0f 1a d3 06 b0 75 8a b6 66 00 
00 K.........u..f..
D (1254894) SIMCOM ppp rx: 33 ba 50 10 7b 88 d8 f4 00 00 43 51 
7e          3.P.{.....CQ~
D (1254894) SIMCOM ppp tx: 7e 21 45 00 01 36 00 5b 00 00 ff 06 e0 3d 0a 
aa ~!E..6.[.....=..
D (1254894) SIMCOM ppp tx: c7 0f bc 8a 4b e5 06 b0 1a d3 00 00 33 ba 75 
8a ....K.......3.u.
D (1254894) SIMCOM ppp tx: b6 66 50 18 16 60 01 71 00 00 49 78 52 41 58 
64 .fP..`.q..IxRAXd
D (1254894) SIMCOM ppp tx: 57 66 6d 47 64 43 4f 62 6d 75 79 6e 35 45 4e 
36 WfmGdCObmuyn5EN6
D (1254894) SIMCOM ppp tx: 70 46 31 31 7a 64 59 4f 63 33 69 54 2b 38 4e 
46 pF11zdYOc3iT+8NF
D (1254894) SIMCOM ppp tx: 44 48 45 78 37 42 33 34 49 72 54 74 34 47 54 
4e DHEx7B34IrTt4GTN
D (1254894) SIMCOM ppp tx: 71 43 61 6f 51 39 65 4e 55 38 58 6a 33 65 53 
69 qCaoQ9eNU8Xj3eSi
D (1254894) SIMCOM ppp tx: 61 66 4e 54 6a 4f 5a 57 5a 70 62 41 3d 3d 0d 
0a afNTjOZWZpbA==..***ERROR*** A
stack overflow in task tiT has been detected.
abort() was called at PC 0x40088838 on core 1

Backtrace: 0x40088720:0x3ffcf170 0x4008881f:0x3ffcf190 
0x40088838:0x3ffcf1b0 0x40086571:0x3ffcf1d0 0x4008
7b40:0x3ffcf1f0 0x40087afa:0x00000040

Rebooting...
ets Jun  8 2016 00:22:57

Full logs are attached. The first couple of reboots (it didn't connect 
to the network properly) and the last reboot (it didn't appear to be 
talking to the network after the second stack overflow) were due to me 
pressing the button. There was another stack overflow shortly after the 
one quoted above (look for the timestamps to reset).
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