From abc417f37a4fc2439e508b84e735de62340ebdd7 Mon Sep 17 00:00:00 2001 From: Aleksander Morgado Date: Fri, 12 Mar 2021 10:33:07 +0100 Subject: [PATCH] sierra: disable CPOL in the EM7345 Using CPOL? in the EM7345 (firmware FIH7160_V1.1_MODEM_01.1349.12) ends up with the whole AT port stuck and non-responsive, which leads to flagging the modem as unusable later on as soon as 10 consecutive AT command timeouts happen. In order to avoid that, we explicitly disable all CPOL based features in this specific module. Fixes https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/336 --- plugins/sierra/77-mm-sierra.rules | 3 +++ 1 file changed, 3 insertions(+) diff --git a/plugins/sierra/77-mm-sierra.rules b/plugins/sierra/77-mm-sierra.rules index dfa4cf56..cac54ed8 100644 --- a/plugins/sierra/77-mm-sierra.rules +++ b/plugins/sierra/77-mm-sierra.rules @@ -10,6 +10,9 @@ SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}=="?*", ENV{.MM_USBIFNUM}="$attr{bInte # Netgear AC341U: enable connection status polling explicitly ATTRS{idVendor}=="1199", ATTRS{idProduct}=="9057", ENV{ID_MM_QMI_CONNECTION_STATUS_POLLING_ENABLE}="1" +# EM7345: disable CPOL based features +ATTRS{idVendor}=="1199", ATTRS{idProduct}=="a001", ENV{ID_MM_PREFERRED_NETWORKS_CPOL_DISABLED}="1" + # MC74XX: Add port hints # if 03: primary port # if 02: raw NMEA port