So, seems I have figured out the issue (at least on my Lenovo T460s) and I think it lies with the Intel chip internal GPU.
If you use display port and HDMI-->Display Port adapter it won't work. The Intel chip doesn't seem to support two DP connections at a time. But you can connect Dp & HDMI-->DVI at the same time (or VGA for that matter) & Internal display. So max is 3 displays but they need to be different techs. I can't confirm this for other laptops without external graphics cards since i don't have any more. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to libxrandr in Ubuntu. https://bugs.launchpad.net/bugs/1771185 Title: Secondary monitor not connecting in 18.04 LTS Status in libxrandr package in Ubuntu: Confirmed Bug description: I have an Acer Aspire V Nitro VN7-592G-709V with Nvidia Geforce 960M (nvidia driver v390) and a Benq W1070 projector. I have upgraded from Ubuntu 16.04 to 18.04 and my projector connects for a split second and then gets disconnected. In Ubuntu 16.04 projector was working fine as a mirror display and extended desktop. Here's what I already tried: - enable the nouveau driver instead of the nvidia driver -> no result - enable the on-board intel board with sudo prime-select intel -> no result - apt purge nvidia* & reinstall nvidia driver 390 (stable) or 396 (beta) -> no result - disable nouveau driver, disable nvidia driver from the repository and install nvidia driver from nvidia website (both 390 and 396) -> no result - installed CCSM (CompizConfig Settings Manager) and disabled display auto-detection -> no result - played around with the refresh rate (some forums say that the two outputs have to be in sync -> no result - deleted the whole Ubuntu 18.04 upgrade and installed a fresh 18.04 -> still the same issue - tried to manually enable the output with xrandr --output HDMI-1-2 --mode 1920x1920 -> nothing - under settings -> devices -> displays I don't see a secondary display (just the main one) I have the latest libxrandr2, 2:1.5.1-1 under Ubuntu 18.04 (updated to day) Here is the output of xrandr the very second when I connect the projector (then HDMI-1-2 goes disconnected and no modes are displayed): ~$ xrandr Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384 eDP-1-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 345mm x 194mm 1920x1080 60.02*+ 60.01 59.97 59.96 59.93 1680x1050 59.95 59.88 1600x1024 60.17 1400x1050 59.98 1600x900 59.99 59.94 59.95 59.82 1280x1024 60.02 1440x900 59.89 1400x900 59.96 59.88 1280x960 60.00 1440x810 60.00 59.97 1368x768 59.88 59.85 1360x768 59.80 59.96 1280x800 59.99 59.97 59.81 59.91 1152x864 60.00 1280x720 60.00 59.99 59.86 59.74 1024x768 60.04 60.00 960x720 60.00 928x696 60.05 896x672 60.01 1024x576 59.95 59.96 59.90 59.82 960x600 59.93 60.00 960x540 59.96 59.99 59.63 59.82 800x600 60.00 60.32 56.25 840x525 60.01 59.88 864x486 59.92 59.57 800x512 60.17 700x525 59.98 800x450 59.95 59.82 640x512 60.02 720x450 59.89 700x450 59.96 59.88 640x480 60.00 59.94 720x405 59.51 58.99 684x384 59.88 59.85 680x384 59.80 59.96 640x400 59.88 59.98 576x432 60.06 640x360 59.86 59.83 59.84 59.32 512x384 60.00 512x288 60.00 59.92 480x270 59.63 59.82 400x300 60.32 56.34 432x243 59.92 59.57 320x240 60.05 360x202 59.51 59.13 320x180 59.84 59.32 DP-1-1 disconnected (normal left inverted right x axis y axis) HDMI-1-1 disconnected (normal left inverted right x axis y axis) DP-1-2 disconnected (normal left inverted right x axis y axis) HDMI-1-2 disconnected (normal left inverted right x axis y axis) 1920x1080 (0x258) 148.500MHz +HSync +VSync h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz 1920x1080 (0x259) 148.500MHz +HSync +VSync h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 56.25KHz v: height 1080 start 1084 end 1089 total 1125 clock 50.00Hz 1920x1080 (0x25a) 148.352MHz +HSync +VSync h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.43KHz v: height 1080 start 1084 end 1089 total 1125 clock 59.94Hz 1920x1080i (0x25b) 74.250MHz +HSync +VSync Interlace h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.75KHz v: height 1080 start 1084 end 1094 total 1125 clock 60.00Hz 1920x1080i (0x25c) 74.250MHz +HSync +VSync Interlace h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 28.12KHz v: height 1080 start 1084 end 1094 total 1125 clock 50.00Hz 1920x1080 (0x25d) 74.250MHz +HSync +VSync h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.75KHz v: height 1080 start 1084 end 1089 total 1125 clock 30.00Hz 1920x1080 (0x25e) 74.250MHz +HSync +VSync h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 28.12KHz v: height 1080 start 1084 end 1089 total 1125 clock 25.00Hz 1920x1080 (0x25f) 74.250MHz +HSync +VSync h: width 1920 start 2558 end 2602 total 2750 skew 0 clock 27.00KHz v: height 1080 start 1084 end 1089 total 1125 clock 24.00Hz 1920x1080i (0x260) 74.176MHz +HSync +VSync Interlace h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.72KHz v: height 1080 start 1084 end 1094 total 1125 clock 59.94Hz 1920x1080 (0x261) 74.176MHz +HSync +VSync h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.72KHz v: height 1080 start 1084 end 1089 total 1125 clock 29.97Hz 1920x1080 (0x262) 74.176MHz +HSync +VSync h: width 1920 start 2558 end 2602 total 2750 skew 0 clock 26.97KHz v: height 1080 start 1084 end 1089 total 1125 clock 23.98Hz 1600x1200 (0x263) 162.000MHz +HSync +VSync h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 75.00KHz v: height 1200 start 1201 end 1204 total 1250 clock 60.00Hz 1280x1024 (0x264) 135.000MHz +HSync +VSync h: width 1280 start 1296 end 1440 total 1688 skew 0 clock 79.98KHz v: height 1024 start 1025 end 1028 total 1066 clock 75.02Hz 1440x900 (0x265) 88.750MHz +HSync -VSync h: width 1440 start 1488 end 1520 total 1600 skew 0 clock 55.47KHz v: height 900 start 903 end 909 total 926 clock 59.90Hz 1280x800 (0x266) 146.250MHz +HSync -VSync h: width 1280 start 1328 end 1360 total 1440 skew 0 clock 101.56KHz v: height 800 start 803 end 809 total 847 clock 119.91Hz 1152x864 (0x267) 108.000MHz +HSync +VSync h: width 1152 start 1216 end 1344 total 1600 skew 0 clock 67.50KHz v: height 864 start 865 end 868 total 900 clock 75.00Hz 1280x720 (0x268) 74.250MHz +HSync +VSync h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.00KHz v: height 720 start 725 end 730 total 750 clock 60.00Hz 1280x720 (0x269) 74.250MHz +HSync +VSync h: width 1280 start 1720 end 1760 total 1980 skew 0 clock 37.50KHz v: height 720 start 725 end 730 total 750 clock 50.00Hz 1280x720 (0x26a) 74.176MHz +HSync +VSync h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 44.96KHz v: height 720 start 725 end 730 total 750 clock 59.94Hz 1024x768 (0x26b) 115.500MHz +HSync -VSync h: width 1024 start 1072 end 1104 total 1184 skew 0 clock 97.55KHz v: height 768 start 771 end 775 total 813 clock 119.99Hz 1024x768 (0x26c) 78.750MHz +HSync +VSync h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.02KHz v: height 768 start 769 end 772 total 800 clock 75.03Hz 1024x768 (0x26d) 75.000MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1328 skew 0 clock 56.48KHz v: height 768 start 771 end 777 total 806 clock 70.07Hz 1024x576 (0x26e) 46.970MHz -HSync +VSync h: width 1024 start 1064 end 1168 total 1312 skew 0 clock 35.80KHz v: height 576 start 577 end 580 total 597 clock 59.97Hz 832x624 (0x26f) 57.284MHz -HSync -VSync h: width 832 start 864 end 928 total 1152 skew 0 clock 49.73KHz v: height 624 start 625 end 628 total 667 clock 74.55Hz 800x600 (0x270) 50.000MHz +HSync +VSync h: width 800 start 856 end 976 total 1040 skew 0 clock 48.08KHz v: height 600 start 637 end 643 total 666 clock 72.19Hz 800x600 (0x271) 49.500MHz +HSync +VSync h: width 800 start 816 end 896 total 1056 skew 0 clock 46.88KHz v: height 600 start 601 end 604 total 625 clock 75.00Hz 720x576 (0x272) 27.000MHz -HSync -VSync h: width 720 start 732 end 796 total 864 skew 0 clock 31.25KHz v: height 576 start 581 end 586 total 625 clock 50.00Hz 720x576i (0x273) 13.500MHz -HSync -VSync Interlace h: width 720 start 732 end 795 total 864 skew 0 clock 15.62KHz v: height 576 start 580 end 586 total 625 clock 50.00Hz 720x480 (0x274) 27.027MHz -HSync -VSync h: width 720 start 736 end 798 total 858 skew 0 clock 31.50KHz v: height 480 start 489 end 495 total 525 clock 60.00Hz 720x480 (0x275) 27.000MHz -HSync -VSync h: width 720 start 736 end 798 total 858 skew 0 clock 31.47KHz v: height 480 start 489 end 495 total 525 clock 59.94Hz 720x480i (0x276) 13.514MHz -HSync -VSync Interlace h: width 720 start 739 end 801 total 858 skew 0 clock 15.75KHz v: height 480 start 488 end 494 total 525 clock 60.00Hz 720x480i (0x277) 13.500MHz -HSync -VSync Interlace h: width 720 start 739 end 801 total 858 skew 0 clock 15.73KHz v: height 480 start 488 end 494 total 525 clock 59.94Hz 640x480 (0x278) 31.500MHz -HSync -VSync h: width 640 start 656 end 720 total 840 skew 0 clock 37.50KHz v: height 480 start 481 end 484 total 500 clock 75.00Hz 640x480 (0x279) 31.500MHz -HSync -VSync h: width 640 start 664 end 704 total 832 skew 0 clock 37.86KHz v: height 480 start 489 end 492 total 520 clock 72.81Hz 640x480 (0x27a) 30.240MHz -HSync -VSync h: width 640 start 704 end 768 total 864 skew 0 clock 35.00KHz v: height 480 start 483 end 486 total 525 clock 66.67Hz 640x480 (0x27b) 25.200MHz -HSync -VSync h: width 640 start 656 end 752 total 800 skew 0 clock 31.50KHz v: height 480 start 490 end 492 total 525 clock 60.00Hz 720x400 (0x27c) 28.320MHz -HSync +VSync h: width 720 start 738 end 846 total 900 skew 0 clock 31.47KHz v: height 400 start 412 end 414 total 449 clock 70.08Hz ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: libxrandr ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon May 14 21:50:07 2018 InstallationDate: Installed on 2018-05-01 (13 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: libxrandr UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libxrandr/+bug/1771185/+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
