I'm beginning to think this is a driver issue. I have a builtin "Kaveri" amd gpu, and pci Radeon HD 4850. I usually have the 4850 as my primary card/monitor setup. However, since upgrading to Ubuntu 17.04, once lightdm is started, only the monitor on the Kaveri works.
I dropped to VT1, and ran `X -configure` after shutting lightdm down, and received an error: amdgpu_device_initialize: DRM version is 2.49.0 but this driver is only compatible with 3.x.x -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1692437 Title: Monitors on second GPU not working after upgrade to zesty Status in Light Display Manager: New Status in xserver-xorg-driver-radeonhd: New Status in lightdm package in Ubuntu: New Bug description: I'm not 100% sure this is the right package to file the bug against, but since upgrading to zesty the two monitors on my second GPU are no longer detected once I reach the greeter screen at login time. However, both of them display information during boot. Let me know how I can narrow down the bug report. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: lightdm 1.22.0-0ubuntu2.1 ProcVersionSignature: Ubuntu 4.8.0-52.55-generic 4.8.17 Uname: Linux 4.8.0-52-generic x86_64 ApportVersion: 2.20.4-0ubuntu4 Architecture: amd64 CurrentDesktop: GNOME Date: Mon May 22 01:42:58 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2016-04-29 (388 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) SourcePackage: lightdm UpgradeStatus: Upgraded to zesty on 2017-05-22 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1692437/+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
