Public bug reported: I'm running a clean install of Xubuntu 16.04 on a Thinkpad X230 and a docking station.
Whenever the login screen comes up -- after booting, by locking the screen, waking up from standby -- as long as I'm plugged into the docking station, the laptop display and all connected monitors just show a blinking underscore and start flickering. It seems like they are endlessly switching resolutions. I can immediately resolve the issue for the moment by releasing the laptop from the dock -- the greeter pops up and I can login normally. After login, everything works as expected, including multiple monitors etc. I understand that all relevant logs are added to this bug automatically, let me know if anything's missing! ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: lightdm 1.18.3-0ubuntu1.1 ProcVersionSignature: Ubuntu 4.8.0-52.55~16.04.1-generic 4.8.17 Uname: Linux 4.8.0-52-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 CurrentDesktop: XFCE Date: Wed May 31 14:05:16 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2017-05-14 (16 days ago) InstallationMedia: Xubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215) LightdmDisplayLog: (II) AIGLX: Suspending AIGLX clients for VT switch (II) AIGLX: Suspending AIGLX clients for VT switch SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: lightdm (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial ** Description changed: - I'm running a clean install of Xubuntu 17.04 on a Thinkpad X230 and a + I'm running a clean install of Xubuntu 16.04 on a Thinkpad X230 and a docking station. Whenever the login screen comes up -- after booting, by locking the screen, waking up from standby -- as long as I'm plugged into the docking station, the laptop display and all connected monitors just show a blinking underscore and start flickering. It seems like they are endlessly switching resolutions. I can immediately resolve the issue for the moment by releasing the laptop from the dock -- the greeter pops up and I can login normally. After login, everything works as expected, including multiple monitors etc. I understand that all relevant logs are added to this bug automatically, let me know if anything's missing! ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: lightdm 1.18.3-0ubuntu1.1 ProcVersionSignature: Ubuntu 4.8.0-52.55~16.04.1-generic 4.8.17 Uname: Linux 4.8.0-52-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 CurrentDesktop: XFCE Date: Wed May 31 14:05:16 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2017-05-14 (16 days ago) InstallationMedia: Xubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215) LightdmDisplayLog: - (II) AIGLX: Suspending AIGLX clients for VT switch - (II) AIGLX: Suspending AIGLX clients for VT switch + (II) AIGLX: Suspending AIGLX clients for VT switch + (II) AIGLX: Suspending AIGLX clients for VT switch SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1694695 Title: lightdm greeter not working while in docking station Status in lightdm package in Ubuntu: New Bug description: I'm running a clean install of Xubuntu 16.04 on a Thinkpad X230 and a docking station. Whenever the login screen comes up -- after booting, by locking the screen, waking up from standby -- as long as I'm plugged into the docking station, the laptop display and all connected monitors just show a blinking underscore and start flickering. It seems like they are endlessly switching resolutions. I can immediately resolve the issue for the moment by releasing the laptop from the dock -- the greeter pops up and I can login normally. After login, everything works as expected, including multiple monitors etc. I understand that all relevant logs are added to this bug automatically, let me know if anything's missing! ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: lightdm 1.18.3-0ubuntu1.1 ProcVersionSignature: Ubuntu 4.8.0-52.55~16.04.1-generic 4.8.17 Uname: Linux 4.8.0-52-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 CurrentDesktop: XFCE Date: Wed May 31 14:05:16 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2017-05-14 (16 days ago) InstallationMedia: Xubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215) LightdmDisplayLog: (II) AIGLX: Suspending AIGLX clients for VT switch (II) AIGLX: Suspending AIGLX clients for VT switch SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1694695/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp