# /dev/qcqmi0 not coming up for EM7565 on Android 8.1 RIL

**URL:** <https://forum.sierrawireless.com/t/dev-qcqmi0-not-coming-up-for-em7565-on-android-8-1-ril/25251>\
**Category:** MC/EM Series\
**Tags:** debug\
**Created:** [October 20, 2021, 6:38am UTC](https://forum.sierrawireless.com/t/dev-qcqmi0-not-coming-up-for-em7565-on-android-8-1-ril/25251 "2021-10-20T06:38:05Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![dhaval.patel1](https://avatars.discourse-cdn.com/v4/letter/d/f1d935/32.png) [@dhaval.patel1](https://forum.sierrawireless.com/u/dhaval.patel1)\
**Post date:** [October 20, 2021, 6:38am UTC](https://forum.sierrawireless.com/t/dev-qcqmi0-not-coming-up-for-em7565-on-android-8-1-ril/25251/1 "2021-10-20T06:38:05Z")

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Hello Everyone,

We have EM7565 on our custom-designed board and host is Android 8.1  
We found some of the specific EM7565 modules from our inventory are not coming up lot of time. They work 1 out of 10 time, but no 100% failure.

logcat -b radio shows below error continuously:  
01-01 01:01:41.941 698 698 I use-Rlog/RLOG-RIL: QCWWAN2kEnumerateDevices unable to find device.. 6

# ls -l /dev/ttyUSB\*

crw-rw---- 1 radio radio 188, 0 2009-01-01 01:00 /dev/ttyUSB0  
crw-rw---- 1 radio radio 188, 1 2009-01-01 01:00 /dev/ttyUSB1  
crw-rw---- 1 radio radio 188, 2 2009-01-01 01:00 /dev/ttyUSB2

# ls -l /dev/qcqmi\*

ls: /dev/qcqmi\*: No such file or directory

# getprop | grep ril

```auto
[init.svc.ril-daemon-qmi]: [running]
[persist.rild.nitz_long_ons_0]: []
[persist.rild.nitz_long_ons_1]: []
[persist.rild.nitz_long_ons_2]: []
[persist.rild.nitz_long_ons_3]: []
[persist.rild.nitz_plmn]: [] 
[persist.rild.nitz_short_ons_0]: [] 
[persist.rild.nitz_short_ons_1]: [] 
[persist.rild.nitz_short_ons_2]: [] 
[persist.rild.nitz_short_ons_3]: [] 
[persist.sys.ril.type]: [QMI] 
[ril.subscription.types]: [NV,RUIM] 
[rild.libpath]: [/system/vendor/lib64/libril-qc-qmi-1.so] 
[ro.boottime.ril-daemon-qmi]: [10370900777] 
[ro.radio.noril]: [no] 
[sys.ril.modem.reset]: [1]

```

What could be the reason for this failure? Can it be a pure hardware issue or an android issue?

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**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\
**Post date:** [October 21, 2021, 4:39am UTC](https://forum.sierrawireless.com/t/dev-qcqmi0-not-coming-up-for-em7565-on-android-8-1-ril/25251/2 "2021-10-21T04:39:45Z")

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Hi dhaval.patel1,

It seems that your issue is similar to this:

> [@RIL 8.1.2 does not create the /dev/qcqmix node on Android-x86 platform](https://forum.sierrawireless.com/t/ril-8-1-2-does-not-create-the-dev-qcqmix-node-on-android-x86-platform/17643):
>
> Hello Team, I have integrated the RIL source 8.1.2 into my Android source based on the Android-x86 platform. But I am not able to boot my tablet, it stuck while booting. Somehow I got it booted from the debug mode, although the cellular network doesn’t come. Below are my observations: 1). The tablet is not booting, maybe because of GobiNet or usbnet drivers, because I am not seeing /dev/qcqmi\* node(Checked by booting into the debug mode). 2). All the serial USB node is created(/dev/ttyUSB\*),…

Thanks,

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<div class="post-metadata">

**Author:** ![dhaval.patel1](https://avatars.discourse-cdn.com/v4/letter/d/f1d935/32.png) [@dhaval.patel1](https://forum.sierrawireless.com/u/dhaval.patel1)\
**Post date:** [November 9, 2021, 9:55am UTC](https://forum.sierrawireless.com/t/dev-qcqmi0-not-coming-up-for-em7565-on-android-8-1-ril/25251/3 "2021-11-09T09:55:55Z")

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Hi @jerdung

No our issue is different. The one you mentioned was from the beginning of porting efforts.  
But what we are observing right now is coming only after updating EM7565 module to the latest firmware SWI9X50C\_01.14.02.00 2e210b

Any idea what could be the reason for this? Any guidance will be great.