Red Hat Bugzilla – Bug 1265482
Fedora 23 Cannot Recognise Auxiliary Monitor on a Dual Head System
Last modified: 2016-12-20 09:41:54 EST
Description of problem:
Fedora 23 cannot find the second monitor. I have tried both GNOME and KDE but the monitor does not become active in either case. The monitor is active in initial boot (I see boot progress on it) but as soon as the GDM kicks in, it goes blank.
I have experimented with the various monitor settings under both KDE and GNOME and nothing I do will activate it, making me assume it is an X Server issue. (I have not experimented with Wayland yet.)
I am running a dual head system (IBM Thinkpad T540p) with a Lenovo ThinkVision monitor.
Steps to Reproduce:
1. Boot Fedora 23 Beta.
GDM (and subsequently GNOME and KDE) cannot activate my auxiliary monitor which was detected and working correctly under F22.
Dual head monitor should be detected.
I can supply log data and sys config info on request. Just tell me what you need and I will be happy to help. Thanks.
Update: Wayland cannot detect the second monitor either.
My bug is possibly related to this one: https://bugzilla.redhat.com/show_bug.cgi?id=1256712
As per comment 2 on that bug, dropping back to kernel-4.1.4-200.fc22.x86_64 allows me to use the second monitor on GNOME/Wayland but not on KDE.
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