I got the greeter working, but there are 2 other issues. The following assumes you are using the unity8 greeter to launch a unity7 session
if (seat-type == unity) The greeter loads, authenticates, a black screen is briefly shown, and the greeter comes back up. My theory here is that lightdm is trying to start unity7 on the same VT as the greeter, and this is making USC mad. I believe this will be fixed in USC in the future, but is there a work around we could have for the time being? if (seat-type == xlocal) The log in /var/log/lightdm for the greeter is called (null)-greeter.log. I think this is because the code path taken doesn't call display_server_set_name in time. I used to know the answer to this, but I've since forgotten. I'm going to dig into this part further today, but if you have input, let me know. -- 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/1583624 Title: Mir cannot open a tty when started by lightdm Status in Light Display Manager: In Progress Status in Light Display Manager 1.18 series: In Progress Status in lightdm package in Ubuntu: Triaged Status in lightdm source package in Xenial: Triaged Bug description: From mir-greeter.log (and with minor instrumentation from RAOF) ERROR: QMirServer - Mir failed to start qtmir.screens: ScreenController::ScreenController qtmir.mir: MirServer created qtmir.mir: Command line arguments passed to Qt: ("/usr/bin/unity8", "--mode=greeter") ERROR: /home/josh/Documents/mir/verbose-error-for-vt-finding/src/server/graphics/default_configuration.cpp(133): Throw in function mir::DefaultServerConfiguration::the_graphics_platform()::<lambda()> Dynamic exception type: boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> > std::exception::what: Exception while creating graphics platform ERROR: /home/josh/Documents/mir/verbose-error-for-vt-finding/src/platforms/mesa/server/kms/linux_virtual_terminal.cpp(238): Throw in function int mir::graphics::mesa::LinuxVirtualTerminal::find_active_vt_number() Dynamic exception type: boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error> > std::exception::what: Failed to find the current VT. Tried: /dev/tty0: Failed to open read-only: Permission denied Failed to open write-only: Permission denied /dev/tty: Failed to open read-only: No such device or address Failed to open write-only: No such device or address This occurs when trying to start the unity8 greeter under unity system compositor To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1583624/+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
