• multiple monitors not working properly in Gnome


    @joekamprad and all of you:
    Tried a lot on the internet found ‘solutions’ but still,
    multiple monitors not working properly in Gnome.
    Also can’t get the Gnome extension “multi monitors add-on” installed because “it isn’t recognised” by Gnome shell?

    Gnome:

    • monitor settings are always lost
    • primair monitor becomes pixelated
    • when second monitor is already connected during boot, system will freeze on two black screens
    • when second monitor is connected after boot: primair monitor becomes pixelated and stays like that, second monitor will only connect when choose manual

    Mate:

    • multiple monitors are working properly after putting settings manual and saving the settings to monitors.xml

    XFCE:

    • multiple monitors are working properly

    OpenBox:

    • multiple monitors are working properly after putting settings manual and redoing that after each boot

    So, now i have configured my multiple monitor settings properly in Mate and copied the monitors.xml file to Gnome. But after reboot i get the same results as under Gnome, see list of problems above.

    The weird thing i noticed is that the primair monitor (laptop monitor) is shown as two monitors in the monitors (display) settings. And the second monitor is the third. ;-?

    In Mate i see also two primair monitors but i have disabled one of the two primair monitors and then enabled my second monitor and in that way it works. But in Gnome that’s not possible and not working.

    Thanks for help.

  • Are you using Nvidia drivers? I had both monitors hooked up and configured in the live usb before installing.

    MultiMon

  • @bartatantergos can you give us a summery of specs and boot:

    lspci > log.txt && lsusb >> log.txt && dmesg >> log.txt && cat log.txt | curl -F [email protected] https://ptpb.pw/?u=1
    this will prompt a link you can share here…

    [updates once a week] = [90% less problems]
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  • @joekamprad Late answer, i have taken out only the lines that matter:

    lspci > log.txt && cat log.txt
    

    gives:

    00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
    00:16.0 Communication controller: Intel Corporation 7 Series/C216 Chipset Family MEI Controller #1 (rev 04)
    00:1f.3 SMBus: Intel Corporation 7 Series/C216 Chipset Family SMBus Controller (rev 04)
    01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 650M Mac Edition] (rev a1)
    01:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1)
    Thunderbolt Controller [Light Ridge 4C 2010]
    06:00.0 PCI bridge: Intel Corporation CV82524 Thunderbolt Controller [Light Ridge 4C 2010]
    06:03.0 PCI bridge: Intel Corporation CV82524 Thunderbolt Controller [Light Ridge 4C 2010]
    06:04.0 PCI bridge: Intel Corporation CV82524 Thunderbolt Controller [Light Ridge 4C 2010]
    06:05.0 PCI bridge: Intel Corporation CV82524 Thunderbolt Controller [Light Ridge 4C 2010]
    06:06.0 PCI bridge: Intel Corporation CV82524 Thunderbolt Controller [Light Ridge 4C 2010]
    07:00.0 System peripheral: Intel Corporation CV82524 Thunderbolt Controller [Light Ridge 4C 2010]
    
  • @joekamprad and the lines that matter for:

    lspci > log.txt && dmesg
    

    gives:

    [    4.414173] snd_hda_intel 0000:00:1b.0: enabling device (0000 -> 0002)
    [    4.415100] snd_hda_intel 0000:01:00.1: enabling device (0000 -> 0002)
    [    4.415182] snd_hda_intel 0000:01:00.1: Disabling MSI
    [    4.415186] snd_hda_intel 0000:01:00.1: Handle vga_switcheroo audio client
    [    4.421905] [drm] Memory usable by graphics device = 2048M
    [    4.421907] checking generic (90020000 708000) vs hw (b0000000 10000000)
    [    4.421908] [drm] Replacing VGA console driver
    [    4.424237] AVX version of gcm_enc/dec engaged.
    [    4.424238] AES CTR mode by8 optimization enabled
    [    4.493185] nvidia: loading out-of-tree module taints kernel.
    ...
    [    4.493189] nvidia: module license 'NVIDIA' taints kernel.
    [    4.493190] Disabling lock debugging due to kernel taint
    ...
    [    4.514896] ACPI: Video Device [GFX0] (multi-head: yes  rom: yes  post: no)
    [    4.514984] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:01/LNXVIDEO:00/input/input8
    [    4.515398] ACPI: Video Device [IGPU] (multi-head: yes  rom: no  post: no)
    [    4.515490] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:01/input/input9
    [    4.523702] iTCO_vendor_support: vendor-support=0
    [    4.524409] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
    [    4.524460] iTCO_wdt: unable to reset NO_REBOOT flag, device disabled by hardware/BIOS
    [    4.525766] tg3 0000:02:00.0 enp2s0f0: renamed from eth0
    [    4.526098] applesmc: key=431 fan=2 temp=31 index=31 acc=1 lux=2 kbd=1
    [    4.529230] nvidia-nvlink: Nvlink Core is being initialized, major device number 241
    [    4.529431] nvidia 0000:01:00.0: enabling device (0006 -> 0007)
    [    4.529507] nvidia 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
    [    4.529593] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  384.69  Wed Aug 16 19:34:54 PDT 2017 (using threaded interrupts)
    [    4.535856] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  384.69  Wed Aug 16 19:39:44 PDT 2017
    [    4.538622] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
    [    4.538624] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 1
    ...
    [    4.990545] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input12
    [    4.990583] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input13
    [    4.990615] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input14
    

    … between is where non-video stuff was going on.

  • @underclock Yes, i have during installation installed the proprietary drivers.

    Should this do the trick?

  • This are all late answers because i have tried and test a lot .
    The weird things that i now have noticed with Antergos Gnome:

    • 2 displays works in LightDM but not when logged-in in Gnome.

    When logged-in in Gnome:

    • 1st time external display connection:
      • bad resolution on primaire laptop display
      • black on secondary display
    • 2th time external display connection:
      • good resolution on primaire laptop display
      • good resolution on secondary display
      • IT WORKS?!
    • 3th time external display connection:
      • black on primaire display
      • black on secondary display
        Then i have to reboot.

    So, it have for sure to do with Gnome settings and the order how display settings are read.

    also:

    • 1 primaire laptop display no external display:
      • 2 displays shown in display settings
    • 1 primaire laptop display + 1 external display:
      • 3 displays shown in display settings

    Does somebody recognise this and/or has a solution to get this properly working?

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