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Various Graphics processes fail when monitor is turned off and there are multiple graphics cards.

_JS_
Beginner
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https://community.intel.com/t5/Graphics/Intel-ARC-A770-stops-working-when-monitor-turns-off/td-p/1525230

 

I have 3 graphics cards

Intel(R) Arc(TM) A770 Graphics

Intel(R) UHD Graphics 770

NVIDIA GeForce GTX 750

 

Before I installed the GTX(an old gfx card) I could transcode while the monitor was off and generally not have any issues. I had to install the GTX to get vga ports for some other monitors and other reasons.

 

After install I would then start having various graphical issues when turning off the monitor. I thought though, at the time, it was due to updating the intel drivers because some time had passed and I guess I didn't put 2 and 2 together or it was the driver update.

 

In any case, I disabled the UHD and GTX from device manager and I then stopped having the graphics problems(explicitly tested). Of course it is unlikely to do with the UHD as that has always been apart of the system.

 

What seems to happen is that when the monitor is turned off(and not immediately but after a few minutes it seems. Or, rather, after a transcode has done and moved to the next item) the intel A770 is either "disabled" or the order changes.  It seems the "order changes" or some type of strange enumeration issue happens when there are multiple non-intel graphics cards involved.

I also have this issue with VM workstation where it will default to the GTX rather than the A770 which causes some problems with memory(as there is then very low video memory for the VM). This, in fact, is what lead me to disable the GTX and I realized it might solve the transcoding problem which it did.

Currently I simply disable the other graphics cards when I want to transcode and it seems to be working but, of course is not the desirable solution.

 

 

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Hugo_Intel
Employee
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Hello _JS_


Thank you for posting on the Intel Communities. I understand from this and the previous thread that you will get an error message when trying to transcode in FFmpeg with the Nvidia GPU enabled and when the monitor is off. I know this can be an inconvenience for your productivity and we will be happy to help.


I saw this happens with FFmpeg, Have you checked if any similar issue would happen if you test any other transcoding application like Handbrake or any other?


In addition, I would like to get your drivers and hardware details so we can check for possible updates, please share with us a log file from the Intel® System Support Utility.


Best Regards,


Hugo O.

Intel Customer Support Technician.


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_JS_
Beginner
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The issue still occurs.

 

What happens now is that when I turn off the monitor during transcode is that the fps speed drops significantly. It's normally around 20x. Turn off monitor and it drops down to 0.1x. I have to restart the transcode. I didn't notice the change the first time since it was transcoding and didn't give the error. I've notice other glitches here and there but most of the problems have disappeared or changed.

 

It really looks like when the monitor is turned off it somehow disables something on the graphics card. My guess is that this is some type of power optimization "feature". Also, now when transcoding, even if I turn off the monitor the computer will go to sleep. Technically I do not know if the 20x -> 0.1x issue happens due to the computer going to sleep or due to the monitor being off. Again, I used to not have these problems so it's either due to adding the GTX and/or due to updates. Likely it is due to the GTX(probably some weird thing with the nvidia drivers).

 

I will work on getting the logs later.

 

 

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Andres_Intel
Employee
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Hello _JS_,

 

 

Thank you for your response and for all the information provided.


I will wait for you to share the Intel® System Support Utility logs, once I have them I will take a look and provide you with the next steps.

 

  

Regards,  

 

Andres P. 

Intel Customer Support Technician 


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Hugo_Intel
Employee
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Hello _JS_


I see from your previous post the issue seems to happen only when installing the old Nvidia GPU, Have you tried disabling/uninstalling the Arc GPU from the device manager and checked if the same happens only using the Nvidia GPU, if the problem only happens with the Nvidia GPU you might need to report this issue to them.


Please also, share with us your system information through the SSU report we requested in our previous post so we can get your hardware details.


Best Regards,


Hugo O.

Intel Customer Support Technician.


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Hugo_Intel
Employee
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Hello _JS_


I wanted to check if you had the chance to test the Nvidia GPU while the Arc graphics ins uninstalled/disabled from the system, so we can make sure if the issue is exclusive to the Nvidia graphics card. Let us know your findings.


Best Regards,


Hugo O.

Intel Customer Support Technician.


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Hugo_Intel
Employee
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Hello _JS_


As mentioned in our previous post in case you had the chance to test only the GTX GPU without the Arc GPU installed and if the same issue happens it would be better to report this issue to Nvidia since it seems so far the GTX GPU is the root cause of the issue. Since we have not received a response from you we will be closing this thread, however, if you need further assistance feel free to open a new topic.


Best Regards,


Hugo O.

Intel Customer Support Technician.


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