I'm using Ubuntu 18.04, on a system with two monitors. First is an LG 23" monitor (in portrait) connected via D-SUB and the second a 27" Dell monitor (in landscape) connected with HDMI.
I've already verified in the Dell forums that the login screen won't be shown due to the HDMI connection (it's not shown when booting to different OSes as well). My question concerns the monitor connected via D-SUB. The observed behavior is the following:
The monitor fills with a deep purple color. My account (name and icon) and the password typing form are not visible. The system is operational; blindly hitting space and entering my password+Enter logs me into my account. When the D-SUB screen is the only one connected, the login screen appears normally.
This is one of the many problems encountered while working with two monitors in Ubuntu. Is there a solution? Would customizing my login screen solve the problem by virtue of overwritting settings?
sddmas the greeter/login screen appears on both displays (I don't have issues with nothing showing, but I often have a display turned off thus having it all on displays works for me). The default is
gdm3for Ubuntu desktop (on 18.04). Switching to another DM is one option. ps: I would wait for other advice from people who are familiar with configuring gdm3; alas it's not me, so I'm offering my choice
$ lspci | grep VGA00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06) 01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GTX 650] (rev a1)