I have two monitors connected to my Intel Skylake onboard graphics, using DVI and HDMI connectors. In systemsettings, only one monitor is shown in the top graphics window as "HDMI3". In the primary display, I can select HDMI2 or HDMI3. Both monitors show the same screen, despite "unify outputs" not being chosen. Reproducible: Always Steps to Reproduce: 1. connect two monitors to HDMI and DVI of Intel onboard graphics 2. open systemsettings 3. unselect "unify outputs" Actual Results: both screen shows same image Expected Results: desktop spread over both monitors, showing a different image each
xrandr output: Screen 0: minimum 8 x 8, current 1600 x 1200, maximum 32767 x 32767 DP1 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 connected primary 1600x1200+0+0 (normal left inverted right x axis y axis) 408mm x 306mm 1600x1200 60.00*+ 1280x1024 75.02 60.02 1280x960 60.00 1152x864 75.00 1024x768 75.08 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 640x480 75.00 72.81 66.67 60.00 720x400 70.08 HDMI3 connected 1600x1200+0+0 (normal left inverted right x axis y axis) 408mm x 306mm 1600x1200 60.00*+ 1280x1024 75.02 60.02 1280x960 60.00 1152x864 75.00 1024x768 75.08 70.07 60.00 832x624 74.55 800x600 72.19 75.00 60.32 56.25 640x480 75.00 72.81 66.67 60.00 720x400 70.08 VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Thanks for the bug-report! Just to be sure: when applying the config to span the desktop across both screens, you should drag the outputs in the preview accordingly. The unify button behaves a bit weird like that, I'm not perfectly happy with how the interaction works there, and we're currently revisiting this. That said, I am aware of positioning bugs that can lead to the problem you're facing. The good news is that they are fixed already, although only in the upcoming Plasma 5.8 release. Could you please test this release and report back? (I'll close this bug-report in the meantime, if the bug persists with 5.8, we can re-open it and look into it again.)
Thanks for the feedback. I'm currently stuck on 5.5 with Kubuntu, but I'll be able to test next release. But just to clarify what I'm talking about, I attached a screenshot of systemsettings, which shows only one monitor in the preview, even though there are two.
Created attachment 101316 [details] systemsettings showing only one monitor in preview
So, what happens if you drag the HDMI2 SyncMaster output aside in the top section?
OMG! Now I see, and it WORKS ... But, you know, this isn't really very intuitive. :-) Has this been changed in newer releases? If not, I'd like to convert this bug report into a feature reuqest. :-)
I'm not overly happy with that portion of the ui either. We're currently in the process of polishing the design of that settings module, and I'll take your feedback into account. Thanks!