debcrafters-packages team mailing list archive

[Tony Hsiao <2126468@xxxxxxxxxxxxxxxxxx>]

Tested on Plucky

ubuntu@stock-desktop:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 25.04
Release:	25.04
Codename:	plucky
ubuntu@stock-desktop:~$ lsusb -d 413c:8217
Bus 004 Device 003: ID 413c:8217 Dell Computer Corp. DW5826e-eSIM Qualcomm Snapdragon X12 Global LTE-A
ubuntu@stock-desktop:~$ cat /sys/bus/usb/devices/4-1/idVendor
413c
ubuntu@stock-desktop:~$ cat /sys/bus/usb/devices/4-1/idProduct
8217
ubuntu@stock-desktop:~$ cat /sys/bus/usb/devices/4-1/power/control
on
ubuntu@stock-desktop:~$ sudo apt install -t plucky-proposed systemd-hwe-hwdb 
The following package was automatically installed and is no longer required:
  grub-pc-bin
Use 'sudo apt autoremove' to remove it.

Upgrading:
  systemd-hwe-hwdb

Summary:
  Upgrading: 1, Installing: 0, Removing: 0, Not Upgrading: 297
  Download size: 3,536 B
  Space needed: 1,024 B / 940 GB available

Get:1 http://archive.ubuntu.com/ubuntu plucky-proposed/main amd64 systemd-hwe-hwdb all 257.4.3 [3,536 B]
Fetched 3,536 B in 1s (4,816 B/s)            
(Reading database ... 149141 files and directories currently installed.)
Preparing to unpack .../systemd-hwe-hwdb_257.4.3_all.deb ...
Unpacking systemd-hwe-hwdb (257.4.3) over (257.4.2) ...
Setting up systemd-hwe-hwdb (257.4.3) ...
Processing triggers for udev (257.4-1ubuntu3) ...
ubuntu@stock-desktop:~$ apt policy systemd-hwe-hwdb
systemd-hwe-hwdb:
  Installed: 257.4.3
  Candidate: 257.4.3
  Version table:
 *** 257.4.3 100
        100 http://archive.ubuntu.com/ubuntu plucky-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     257.4.2 500
        500 http://archive.ubuntu.com/ubuntu plucky-updates/main amd64 Packages
     256.4.1 500
        500 http://archive.ubuntu.com/ubuntu plucky/main amd64 Packages
ubuntu@stock-desktop:~$ sudo reboot

ubuntu@stock-desktop:~$ cat /sys/bus/usb/devices/4-1/power/control
auto


** Tags removed: verification-needed verification-needed-noble verification-needed-plucky
** Tags added: verification-done-noble verification-done-plucky

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to systemd-hwe in Ubuntu.
https://bugs.launchpad.net/bugs/2126468

Title:
  Add Dell DW5826e WWAN modem to autosuspend

Status in OEM Priority Project:
  New
Status in systemd-hwe package in Ubuntu:
  Fix Released
Status in systemd-hwe source package in Noble:
  Fix Committed
Status in systemd-hwe source package in Plucky:
  Fix Committed
Status in systemd-hwe source package in Questing:
  Fix Released

Bug description:
  [ Impact ]

   * Systems with Dell DW5826e WWAN modems currently cannot benefit from
  USB autosuspend power management, preventing the processor from
  reaching deeper PC# states when the modem is idle.

   * Backporting upstream patch [1] that adds rules in
  hwdb.d/60-autosuspend.hwdb for Dell DW5826e WWAN modem

  [ Test Plan ]

   * DUT: Platform with Dell DW5826e WWAN modem

  $ lsusb -d 413c:8217
  Bus 004 Device 002: ID 413c:8217 Dell Computer Corp. DW5826e-eSIM Qualcomm Snapdragon X12 Global LTE-A
  $ cat /sys/bus/usb/devices/4-1/idVendor 
  413c
  $ cat /sys/bus/usb/devices/4-1/idProduct 
  8217

   1. Confirm autosuspend is not enabled before patch and is set to "on"
  in power/control

  $ cat /sys/bus/usb/devices/4-1/power/control 
  on

   2. Install patch
   3. Autosuspend is enabled, namely, set to "auto" in power/control

  $ cat power/control
  auto

  [ Where problems could occur ]

   * The modem might experience connection instability or fail to wake
  up properly from suspend.

  [ Other Info ]

   * [1] 60-autosuspend.hwdb: Add Dell DW5826e WWAN modem to
  autosuspend: https://github.com/systemd/systemd/pull/38685

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