Public bug reported: Nvidia's specifications for the Quadro 420 state:
"Drive up to four 30’ displays at 2560x1600 resolutions" After a couple of days trying variations, I discovered the only way I could get 4 displays working properly was to set them all to 1280x1024. If any of the 4 were set to a higher resolution via the System Settings -> Displays -> Resolution, it would do various buggy things. Here's my configuration: # apt list --installed|egrep -i "nvidia|nouveau" WARNING: apt does not have a stable CLI interface. Use with caution in scripts. libdrm-nouveau2/zesty,now 2.4.76-1 amd64 [installed] nvidia-340/zesty,zesty,now 340.102-0ubuntu3 amd64 [installed] nvidia-opencl-icd-340/zesty,zesty,now 340.102-0ubuntu3 amd64 [installed,automatic] nvidia-prime/zesty,now 0.8.4 amd64 [installed,automatic] nvidia-settings/zesty,now 381.22-0ubuntu0~gpu17.04.1 amd64 [installed] # lspci -k | grep -iEA3 '3D|VGA' 03:00.0 VGA compatible controller: NVIDIA Corporation G98 [Quadro NVS 420] (rev a1) Subsystem: NVIDIA Corporation G98 [Quadro NVS 420] Kernel driver in use: nouveau Kernel modules: nvidiafb, nouveau, nvidia_340 04:00.0 3D controller: NVIDIA Corporation G98 [Quadro NVS 420] (rev a1) Subsystem: NVIDIA Corporation G98 [Quadro NVS 420] Kernel driver in use: nouveau Kernel modules: nvidiafb, nouveau, nvidia_340 # uname -a Linux jabowery-H61M-S2-B3 4.10.0-21-lowlatency #23-Ubuntu SMP PREEMPT Fri Apr 28 18:21:43 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux ** Affects: nvidia-graphics-drivers-340-updates (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1690470 Title: Quadro 420 limited to 1280x1024 for each of the 4 displays To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-340-updates/+bug/1690470/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs