I am running 16.04 with two monitors. One is connected via vga on my motherboard and the other via displayport on my (Nvidia) graphics card. Upon resuming from a suspension, during which both monitors were working correctly, only the vga monitor displays the login screen and the DP one is not even detected. My graphics card is still detected running the latest driver. The issue only occurs once the system has been suspended for a considerable amount of time (hours).

EDIT: My integrated graphics are those of an Intel i5-6500.

Output from lspci -nnk | grep -A3 -Fe '[0300]' (during the issue):

nick@nick-ubuntu-16-04lts:~$ lspci -nnk | grep -A3 -Fe '[0300]'
00:02.0 VGA compatible controller [0300]: Intel Corporation Sky Lake Integrated Graphics [8086:1912] (rev 06)
    DeviceName:  Onboard IGD
    Subsystem: ASUSTeK Computer Inc. Skylake Integrated Graphics [1043:8694]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device [10de:1b81] (rev a1)
    Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3302]
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia_384_drm, nvidia_384

EDIT2: Per David Foerster's suggestion I have linked the logs-

/var/log/Xorg.0.log

/var/log/pm-suspend.log ---Did not exist

sudo dmesg

  • @DavidFoerster I've added the info and the output from the command. Thanks a lot. – CircArgs Sep 26 '17 at 1:25
  • I know little about dual-graphics setups but there are a few log files that would help the people who do: /var/log/pm-suspend.log, /var/log/Xorg.0.log and the output of sudo dmesg, all taken shortly after resume-from-suspend. – David Foerster Sep 26 '17 at 12:14
  • @DavidFoerster Oddly, the problem only occurs after suspension for hours. I will post the logs once the problem recurs. Hopefully the question is not buried by then. Thanks – CircArgs Sep 27 '17 at 5:39
  • When you edit the question or post comments it is pushed to the top of the question list. Please don't abuse this to "bump" your question though! There are detection measures in place. ;-) – David Foerster Sep 27 '17 at 6:38
  • @DavidFoerster Oh, thanks I didn't know that and not interested in gaming the system. Hopefully all the information that might be needed is now in my edits. Thanks again – CircArgs Sep 27 '17 at 22:50

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