[SRU] Fix fcc-unlock script for Lenovo X13s
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| modemmanager (Ubuntu) |
Fix Released
|
Undecided
|
Dan Bungert | ||
| Mantic |
New
|
Undecided
|
Unassigned | ||
| Noble |
Fix Released
|
Undecided
|
Dan Bungert | ||
Bug Description
[ Impact ]
Some of the Lenovo X13s laptop SKUs, based on the Qualcomm Snapdragon 8cx, come with an integrated 4G/5G modem. The modem on the X13s is manufactured by foxconn, and is based on the Qualcomm Snapdragon X55 PCIe modem.
Here is the output of mmcli -m 0 on an X13s
Hardware | manufacturer: foxconn
| model: Qualcomm Snapdragon X55 5G
| firmware revision: T99W175.
| 045 1 [Feb 03 2023 10:00:00]
All Linux kernel drivers are upstream to support this data modem, and included in the Ubuntu kernel for mantic. The support for this modem is also merged in modemmanager, including the fcc-unlock script for this modem model (https:/
We are however missing the symlink for the specific PCIe ID link reported on the X13s for this modem, which is shown by lspci as:
0004:01:00.0 Wireless controller [0d40]: Foxconn International, Inc. T99W175 5G Modem [Snapdragon X55] [105b:e0c3]
This is already fixed upstream with https:/
With the backport of this patch the modem on the X13S can be enabled by laptop users using the fcc-unlock generic guidelines. And mobile broadband is working out of the box. Without it, the modem won't work.
[ Test Plan ]
Without the ability to FCC unlock this modem model, any attempt to enable/start the modem will fail / stall, as detailed on https:/
With this backport/fix, the Ubuntu Mobile network settings/UI can be used to enabled the modem, unlock the SIM card and connect to the 4G/5G network (assuming the user has a SIM card with an appropriate data plan).
[ Where problems could occur ]
The patch is fairly isolated change. The purpose of this change is to create an additional symlink in /usr/share/
Also links in this folder have no effect on the system, unless the user manually enable the appropriate fcc unlock script, typically by adding a link in /etc/ModemManag
[ Other Info ]
I am working on a debdiff, and will upload shortly
| Nicolas Dechesne (ndec) wrote | #1 |
| Ubuntu Foundations Team Bug Bot (crichton) wrote | #2 |
| tags: | added: patch |
| Dan Bungert (dbungert) wrote | #3 |
| Changed in modemmanager (Ubuntu Noble): | |
| assignee: | nobody → Dan Bungert (dbungert) |
| status: | New → In Progress |
| status: | In Progress → Fix Committed |
| Dan Bungert (dbungert) wrote | #4 |
| Launchpad Janitor (janitor) wrote | #5 |
| Changed in modemmanager (Ubuntu Noble): | |
| status: | Fix Committed → Fix Released |
| Nicolas Dechesne (ndec) wrote | #6 |
The attachment "modemmanager-
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