https://bugzilla.kernel.org/show_bug.cgi?id=108561
Bug ID: 108561 Summary: nouveau: external monitor can not be enabled with hindsight Product: Drivers Version: 2.5 Kernel Version: 4.2.5-1-ARCH #1 SMP PREEMPT Tue Oct 27 08:13:28 CET 2015 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: estellnb@elstel.org Regression: No
Whenever I boot without an external monitor enabled then I get problems trying to enable my u2868pqu monitor with hindsight. Xorg will recognize and it will let me configure the external monitor. However the external monitor will stay black and without a signal in spite of being configured well. If I just reboot the X-server with the monitor cable unplugged then there will be no problem in enabling my u2868pqu monitor. Consequently I would assume this to be a kernel / nouveau module bug since it depends on boot time not on the time when I start the X-server. Is there any way to post the external monitor if I have booted without it? What would you believe is going wrong here with nouveau and the HDMI port?