Well, in the case of a Lenovo 4338, a quick google shows it is based on the SMSC2517, (https://joes-tech-blog.blogspot.com/2017/09/whats-inside- lenovo-docking-station-for.html) and well, another quick google show SMSC was aquired by Microchip, and after a third Google, I can tell you the USB controller chip and see that it even has published suspend- related errata that they do not plan on fixing that was discovered in Windows 8 days.
Some excerpts below: Module 1: End of User Impacts: Port might fail to go into SUSPEND. Solution: This will not be addressed in a future version of the device. Module 2: End of User Impacts: Device might not enumerate. Solution: Use external power on reset circuit (for example, reset circuit with MAX809S(V2.9V) voltage supervisor) https://ww1.microchip.com/downloads/en/DeviceDoc/80000628A.pdf Likely these quirks are not being backported into the drivers, to workaround in software for certain scenarios, and so are being stumbled upon with more advanced multi-device scenarios now supported in newer Ubuntu versions. I would isolate the dock showing that the scenario works with a different port replicator/chip, and then either a) use the other port replicator b) reach out to the maintainer of the driver, see if you can give him some hardware, a reproducable scenario, you might be able to get a fix c) find a developer for hire, do the same, upstream a patch -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1841826 Title: Going to sleep instead of logging in while lid closed & external display Status in gnome-settings-daemon package in Ubuntu: Confirmed Status in gnome-shell package in Ubuntu: Confirmed Status in mutter package in Ubuntu: Confirmed Bug description: I have the above described problem, which seems to be very similar to bug #1716160 - laptop is in docking station and 2 monitors are connected (HDMI, DVI) - If the lid is closed and I boot the laptop I can input my credentials in the login screen and after hitting ENTER the laptop goes to sleep - If I then press the power button of the docking station the laptop wakes up and goes straight to the ubuntu environment w/o any user identification The device is a Lenovo T420 with classic docking station. Ubuntu 18.04.3 LTS. Internal graphics Intel integrated grafics and dedicated Nvidia Quadro NVS 4200M with propriety driver 390.116. Behavior independent of the graphics used. I do not know what to do now since the latest state of bug #1716160 is "fix released" and so I guess it should be part of the ubuntu version I use? Thank you very much. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.4-0ubuntu18.04.1 ProcVersionSignature: Ubuntu 5.0.0-25.26~18.04.1-generic 5.0.18 Uname: Linux 5.0.0-25-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Aug 28 20:10:15 2019 DisplayManager: gdm3 GsettingsChanges: b'org.gnome.shell' b'app-picker-view' b'uint32 1' b'org.gnome.shell' b'favorite-apps' redacted by apport b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" b'org.gnome.desktop.interface' b'show-battery-percentage' b'true' b'org.gnome.desktop.interface' b'clock-show-date' b'true' InstallationDate: Installed on 2019-08-13 (14 days ago) InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1841826/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
