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Failed to call SetDisplayConfig. [HR: 31] -- but only occasionally

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TimStevens
7 discussion posts
Hey there, have been getting this error intermittently when toggling displays:

An error has occurred while applying your new Monitor configuration.
Please check your settings and try again.
Error: Failed to call SetDisplayConfig. [HR: 31]
[System.Exception]

Weirdly, it only happens sometime, and I haven't been able to identify when. I read through a bunch of other people having this issue and none of them seemed the same, as this is only intermittent. I have four monitors, two profiles, one that disables 3 of them. The second profile re-enables those three and disables the first. It's always that profile that fails probably 30 percent of the time. But, once it fails I have to reboot the PC to get it to work.

I verified that all monitors are recognized by windows, tried turning them off and on again, all that works is a reboot.

Settings attached. Thanks for any guidance!
• Attachment [protected]: DisplayFusion Backup (2020-11-06 @ 15-08, 9.7.0.0, COMPUTERNAME, SettingsWindow).reg [472,656 bytes]
24 days ago  • #1
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Owen Muhlethaler (BFS)
512 discussion posts
Hi Tim,

Can you try updating to our latest beta and see if the issue persists? Here's the link: https://www.displayfusion.com/Download/Beta/

Let me know how that goes!
20 days ago  • #2
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TimStevens
7 discussion posts
Thanks, just installed. Will keep an eye on it.
20 days ago  • #3
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JM241
2 discussion posts
Been getting this a lot lately on 9.7.0. I just installed 9.7.1 beta 6 and it still failed with the same error when attempting to set profiles. Even a reboot wouldn't get it to work, always getting the [HR: 31] error.

I could manually change things like monitor enablement though, so I deleted and re-created both my 2 profiles. They worked reliably.

Then it occurred to me that both my profiles include a Dell monitor connected via USB-C. My laptop has two USB-C ports and I'm not rigorous about always plugging the cable into the same one, so I did an experiment and shifted the monitor back and forth between the USB-C ports.

If I connect the monitor to the same USB-C port as when I saved a given profile, the profile always works. If I connect the monitor to the other USB-C port then the Load Profile fails reliably, though it is of course the same physical monitor.

For now, it's easy for me to just pick a USB-C port and stick with it, but thought you should know.
20 days ago  • #4
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Owen Muhlethaler (BFS)
512 discussion posts
Hello,

Interesting observation, thanks for the feedback!
19 days ago  • #5
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TimStevens
7 discussion posts
Circling back. I got the same error using the Beta 6 version. I attempted to open the log to see the details, but got this error:

The Debug Log file could not be found.
Make sure you have enabled Debug Logging first.


I don't see a place in the Troubleshooting window to enable logging, though. Where is that option? All the references I found in the forum indicated it should be on that section of the preferences but I don't see it.

I do have a copy of the full System Information if that's helpful.
17 days ago  • #6
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Owen Muhlethaler (BFS)
512 discussion posts
Hi Tim,

If you could send over a copy of your system information, that would be great. The steps to enable logging can be found below:

  • On the DisplayFusion Settings > Troubleshooting tab, change the Logging drop-down to "L1: Log Minimal" and click Apply
  • Reproduce the issue and note the time so we'll know where to check in the log file
  • Click the "Export Info to File" button on the Settings > Troubleshooting tab
  • Reply with the file attached
  • Disable debug logging after sending the log

Also, if you happen to notice a trend of when this is happening, that would be great as well.

Thanks!
13 days ago  • #7
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TimStevens
7 discussion posts
Here you go. This happened around 7:45pm ET. I have four monitors and two configurations. One config disables the right three and enables the left one. The second configuration reverses that. This only ever happens when moving to the second configuration, and maybe 50% of the time.
• Attachment [protected]: DisplayFusionDebugInfo.zip [29,699 bytes]
13 days ago  • #8
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Owen Muhlethaler (BFS)
512 discussion posts
Hi Tim,

Thanks for sending those over, we're going to look into this further. I've noted down your contact information, and we'll be in touch either to collect more information, or to let you know when we have a fix.

Thanks!
12 days ago  • #9
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TimStevens
7 discussion posts
Thank you!
12 days ago  • #10
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