# Modem problem after upgrade by spk
**URL:** https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601
**Category:** Uncategorized
**Created:** [August 19, 2021, 11:35am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601 "2021-08-19T11:35:50Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@gennadyk](https://mangoh.discourse.group/u/gennadyk)
#### Post date: [August 19, 2021, 11:35am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/1 "2021-08-19T11:35:50Z")
Hello. After i have problem after update firmware
swi-mdm9x28-wp login: [27.341079] usb 1-1: device descriptor read/64, error -110
[27.609785] bq27xxx-battery 7-0055: invalid battery:voltage-min-design-microvolt 310000
[27.669923] rtc-pcf85063 8-0051: hctosys: unable to read the hardware clock
tzoneset: Changing timezone to [Etc/GMT-3]…
tzoneset: Changing timezone to [Etc/GMT-3]…
[37.058059] Fatal error on the modem.
[37.060712] modem subsystem failure reason: lte\_ml1\_schdlr2\_obj.c:1312:Assert 0 failed: .
[37.069148] M-Notify: General: 8
[37.181006] Kernel panic - not syncing: subsys-restart: Resetting the SoC - modem crashed.
[37.188307] CPU: 0 PID: 1013 Comm: kworker/0:34 Tainted: G O 3.18.140 #1
[37.195986] Workqueue: events device\_restart\_work\_hdlr
[37.201120] [] (unwind\_backtrace) from [] (show\_stack+0x10/0x14)
[37.208832] [] (show\_stack) from [] (panic+0x90/0x1f4)
[37.215686] [] (panic) from [] (device\_restart\_work\_hdlr+0x38/0x3c)
[37.223672] [] (device\_restart\_work\_hdlr) from [] (process\_one\_work+0x1bc/0x2e0)
[37.232788] [] (process\_one\_work) from [] (worker\_thread+0x2dc/0x3b8)
[37.240947] [] (worker\_thread) from [] (kthread+0xc8/0xd4)
[37.248153] [] (kthread) from [] (ret\_from\_fork+0x14/0x3c)
[37.255357] cpr\_panic\_callback: apc\_corner: [corner:2, fuse\_corner:2] = 1087500 uV
[37.263074] Rebooting in 5 seconds…
[42.287095] Going down for restart now
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### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [August 19, 2021, 12:53pm UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/2 "2021-08-19T12:53:11Z")
Are you downloading correct fw?
Is it caused by not enough current?
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### Author:  [@gennadyk](https://mangoh.discourse.group/u/gennadyk)
#### Post date: [August 19, 2021, 2:25pm UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/3 "2021-08-19T14:25:43Z")
yes another boards work good.
the battery is connected. i try make restore firmware via swiflash. The board rebooted, and modem crashed
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### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [August 19, 2021, 3:21pm UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/4 "2021-08-19T15:21:42Z")
Will there be any reset if you flash the previous working fw?
Also are you using mangoh board?
If yes, you can switch the two modules to isolate if this is board issue
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### Author:  [@gennadyk](https://mangoh.discourse.group/u/gennadyk)
#### Post date: [August 20, 2021, 5:55am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/5 "2021-08-20T05:55:15Z")
so I wanted to ask how to change the firmware, so that it completely rewrites everything, does a full reset?
because when I install the spk it feels like it does not always wipe everything, and the user partion should be cleaned by swiflash -r (and this also does not always help)
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### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [August 20, 2021, 6:10am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/6 "2021-08-20T06:10:20Z")
I used one click exe to update fw in windows platform.
The userapp partition will not erased by swiflash tool in the new FW.
You need to downgrade to some old fw and use swiflash tool to erase userapp partition .
E.g. wp76 → downgrade to r12 or before
Wp77 → downgrade to r11 or before
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### Author:  [@gennadyk](https://mangoh.discourse.group/u/gennadyk)
#### Post date: [August 20, 2021, 8:11am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/7 "2021-08-20T08:11:24Z")
so if i have r14 on mango yellow. i should downgrade to previous fw( r13), use swiflash and then install r14. or r11 every time?
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### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [August 20, 2021, 8:16am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/8 "2021-08-20T08:16:46Z")
If you need to erase userapp partition, then yes.
But the question is do you need to erase userapp partition everytime?
This seems not to be a use case.
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### Author:  [@gennadyk](https://mangoh.discourse.group/u/gennadyk)
#### Post date: [August 20, 2021, 8:33am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/9 "2021-08-20T08:33:39Z")
I need the right mechanism how it works. so from r12 removed the functionality of cleaning user partion?
but installing spk which contains linux image, legato and fw for modem, is it all updated?
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### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [August 20, 2021, 8:38am UTC](https://mangoh.discourse.group/t/modem-problem-after-upgrade-by-spk/9601/10 "2021-08-20T08:38:28Z")
this is security hole, it is fixed in newer FW like R12 for WP77:
> **[Swiflash -r broken with release 12 on wp77xx?](https://forum.sierrawireless.com/t/swiflash-r-broken-with-release-12-on-wp77xx/20957)**
>
> Hey, After a board issue (see topic https://mangoh.discourse.group/t/cannot-access-mangoh-yellow-wp7702/4848/27) I think there is a problem with the swiflash command and its -r option for recovery mode. With fw R12, this tool doesn’t work, I had to...