Re: [VirtualGL-Users] Dual GTX 1080i headless server issues

[<sta...@ms...>]

Thank you for your quick reply,
I can at least provide more information regarding some of the short  
testing you had said to do.
When using the command: xauth merge /etc/opt/VirtualGL/vgl_xauth_key
It returns back nothing.
When using the command: xdpyinfo -display :0
It returns: xdpyinfo:  unable to open display ":0".
(also these commands are being done through ssh. If they need to be  
done directly I can)

Further more When adding the line you requested into the  
/etc/mdm/Init/Default script (which is in the correct location) did  
not actually create file/folder that it should have. I wanted to  
verify that mdm is actually the display manager and it is (command  
used: cat /etc/X11/default-display-manager).

I made sure that I was part of the vglusers group.

I tried to redirect the output of the vglgenkey but it seems to not be  
touching the /etc/mdm/Init/Default script.

I hope this sheds a little more light onto what is going on and if  
there is anything further I can provide i'd be happy to do as such. I  
appreciate your time suggestions.
Thank you,

Marshall Stageberg
Michigan State University

Quoting DRC via VirtualGL-Users <vir...@li...>:

> The first thing to try, as indicated in the "Sanity Check" section of
> the docs
> (https://urldefense.proofpoint.com/v2/url?u=https-3A__cdn.rawgit.com_VirtualGL_virtualgl_master_doc_index.html-23hd006002&d=DwICAg&c=nE__W8dFE-shTxStwXtp0A&r=is60q22IcyABEXnsSrzYNQ&m=o2rLPFelD8-NEVKAzy69YMV_WeYzc4l-R3NRWKaDzLg&s=nlo4lHrLMFYP_Xf98qQ9cYZp7a4TF08aoFc0x7h2EEY&e=  
> ),
> is:
>
>   xauth merge /etc/opt/VirtualGL/vgl_xauth_key
>   xdpyinfo -display :0
>
> That may reveal the underlying cause of the problem.  If the xauth
> command fails, then check the following:
>
> - Make sure that your installation of MDM keeps its initialization
> script in the standard place (/etc/mdm/Init/Default).  I've tested Linux
> Mint before, so it should work, but maybe they moved something in a more
> recent release.
>
> - Make sure that /etc/mdm/Init/Default is being modified properly by
> vglserver_config.  It should have a 'vglgenkey' line at the top if all
> is well.
>
> - Edit /etc/mdm/Init/Default and add 'echo here >/tmp/here', then
> restart the display manager and verify that /tmp/here is created.  If
> not, then the display manager isn't executing the initialization script
> as it should.  This is known to be an issue with some versions of GDM:
> https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.redhat.com_show-5Fbug.cgi-3Fid-3D851769&d=DwICAg&c=nE__W8dFE-shTxStwXtp0A&r=is60q22IcyABEXnsSrzYNQ&m=o2rLPFelD8-NEVKAzy69YMV_WeYzc4l-R3NRWKaDzLg&s=Rn4PmhNvGhcUbs7hyAtSVAqsn3QY5YkZOj6UmgSE7nI&e= .  Maybe the  
> issue
> creeped into MATE as well?  (I hope not.)
>
> - Make sure you added yourself to the vglusers group and logged
> out/logged back in to activate the new group permissions.
>
> - Edit /etc/mdm/Init/Default and redirect the output of vglgenkey to a
> file.  Restart the DM and look at the file to see if there are any error
> messages reported by vglgenkey.
>
> This is generally the process I use when diagnosing failures to access
> display :0.  Thus far, I have yet to encounter such a failure that
> wasn't due to one of the issues above.
>
> On 8/1/17 9:54 AM, sta...@ms... wrote:
>> Hi All,
>> I have setup a headless server with 2 - Nvidia GTX 1080i video cards
>> using Linux Mint 18.1 as the OS. I am using the Nvidia 384.59 drivers.
>> Output from nvidia-xconfig --query-gpu-info:
>> Number of GPUs: 2
>>
>> GPU #0:
>>   Name      : GeForce GTX 1080 Ti
>>   UUID      : GPU-cc7afa9d-a61d-950a-0f45-511bd6f1f340
>>   PCI BusID : PCI:4:0:0
>>
>>   Number of Display Devices: 0
>>
>>
>> GPU #1:
>>   Name      : GeForce GTX 1080 Ti
>>   UUID      : GPU-def710e8-b54f-d87d-be43-538d7395c0d8
>>   PCI BusID : PCI:65:0:0
>>
>>   Number of Display Devices: 0
>>
>> Pertinent output from lspci:
>> 04:00.0 VGA compatible controller: NVIDIA Corporation Device 1b06 (rev a1)
>> 41:00.0 VGA compatible controller: NVIDIA Corporation Device 1b06 (rev a1)
>>
>> I am using the default mdm display manager (comes stock with linux mint)
>> When I plug a monitor into the computer directly all video functions
>> work correctly (glxgears, glxinfo, etc..)
>>
>> I setup the vncserver and then use the vncviewer to connect to the
>> headless server. When I try to execute vglrun glxgears I get the error:
>> [VGL] ERROR: Could not open display :0.
>> I have ran the vglserver_config script with stopping the following
>> modules: nvidia_drm, nvidia_uvm, nvidia_modeset, and nvidia. I also
>> stopped the killed the nvidia persistence process prior to the setup
>> along with mdm. The config seemed to complete perfectly and I have
>> restarted the computer.
>>
>> I appreciate any further advice with this issue.
>> Thank you,
>>
>> Marshall Stageberg
>> Michigan State University
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org!  
> https://urldefense.proofpoint.com/v2/url?u=http-3A__sdm.link_slashdot&d=DwICAg&c=nE__W8dFE-shTxStwXtp0A&r=is60q22IcyABEXnsSrzYNQ&m=o2rLPFelD8-NEVKAzy69YMV_WeYzc4l-R3NRWKaDzLg&s=2DnymlF_P6OfmuqWSvKktwOclnXtDFWKeWpmltkquPI&e=
> _______________________________________________
> VirtualGL-Users mailing list
> Vir...@li...
> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.sourceforge.net_lists_listinfo_virtualgl-2Dusers&d=DwICAg&c=nE__W8dFE-shTxStwXtp0A&r=is60q22IcyABEXnsSrzYNQ&m=o2rLPFelD8-NEVKAzy69YMV_WeYzc4l-R3NRWKaDzLg&s=Le6gHqAsmAIFTznxf6jo1Dy89Dd-A1p1e0D5DTLrrtc&e=
>