# EM9191 module not recognized on Linux/Win10 host computer **URL:** \ **Category:** MC/EM Series\ **Tags:** faq\ **Created:** [April 6, 2022, 3:13pm UTC](https://forum.sierrawireless.com/t/em9191-module-not-recognized-on-linux-win10-host-computer/26749 "2022-04-06T15:13:42Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![kyron.longwood](https://avatars.discourse-cdn.com/v4/letter/k/ea5d25/32.png) [@kyron.longwood](https://forum.sierrawireless.com/u/kyron.longwood)\ **Post date:** [April 6, 2022, 3:13pm UTC](https://forum.sierrawireless.com/t/em9191-module-not-recognized-on-linux-win10-host-computer/26749/1 "2022-04-06T15:13:42Z")
The EM9191 module we have recently acquired is not recognized by Device Manager on Windows 10 or dmesg on Ubuntu 20.04LTS. I am not sure if there is a prior configuration required to operate. When plugged in, the USB module has a brief LED light, but still nothing appears to respond on host computer. We are using a generic USB adapter for the modem from [amazon](https://www.amazon.com/NGFF-Adapter-6pin-Slot-Module/dp/B07PDJPP4H/ref=cm_cr_arp_d_product_top?ie=UTF8). Despite no visible device, drivers for Win10 have been installed as provided from the installer [link](https://source.sierrawireless.com/resources/airprime/software/sdx55-windows-drivers-latest-release/). Please let us know if there are any missing steps that we may have overlooked. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [April 6, 2022, 3:17pm UTC](https://forum.sierrawireless.com/t/em9191-module-not-recognized-on-linux-win10-host-computer/26749/2 "2022-04-06T15:17:45Z")
See if this helps > [@PCIE\_DIS signal in EM9190](https://forum.sierrawireless.com/t/pcie-dis-signal-in-em9190/20612): > > The EM9190 product technical specification defines a PCIE\_DIS signal that allows selecting the host interface type (unconnected/low for PCIe, high for USB). Given that the default is PCIe, does this mean the EM9190 cannot be used with the USB host interface on already existing hardware platforms where the corresponding pin is currently unused? E.g. is it that a system that already supported EM7455 modules will not be able to use EM9190 modules due to the wrong PCIE\_DIS signal input? ---
**Author:** ![kyron.longwood](https://avatars.discourse-cdn.com/v4/letter/k/ea5d25/32.png) [@kyron.longwood](https://forum.sierrawireless.com/u/kyron.longwood)\ **Post date:** [April 7, 2022, 12:59pm UTC](https://forum.sierrawireless.com/t/em9191-module-not-recognized-on-linux-win10-host-computer/26749/3 "2022-04-07T12:59:51Z")
The thread linked seems be abandoned and was prior to the device being fully released. Are there any dev boards that I can acquire or a person of contact that help? I do not have any direct communication with Sierra representatives at this moment. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [April 7, 2022, 1:24pm UTC](https://forum.sierrawireless.com/t/em9191-module-not-recognized-on-linux-win10-host-computer/26749/4 "2022-04-07T13:24:33Z")
did you check PCIE\_DIS signal ---
**Author:** ![stefanbruens](https://avatars.discourse-cdn.com/v4/letter/s/13edae/32.png) [@stefanbruens](https://forum.sierrawireless.com/u/stefanbruens)\ **Post date:** [April 7, 2022, 3:25pm UTC](https://forum.sierrawireless.com/t/em9191-module-not-recognized-on-linux-win10-host-computer/26749/5 "2022-04-07T15:25:01Z")
Unfortunately, the EM919x is wired in a way which makes it incompatible with any devices designed for e.g. the EM7455 by default (IMHO quite stupid design decision). If you are capable (or know someone who is) of soldering, it is fairly trivial to modify any USB-m.2 adapter board to pull the PCIe\_DIS signal to 1.8V, so USB is activated instead. Create a resistive voltage divider between 3V3 and GND (e.g. 10k to GND and 6.8k to 3V3), and connect it with the PCIe\_DIS pin.