resolution stuck at 640x480 after update

July 31, 2023 2:31 PM from

I wish I could tell you which update, but I tend to cluster them to get them out of the way (I know, bad habit). Could be Windows, AMD or Multiplicity.

When I first installed Multiplicity I got nada. I came here and found the HDMI terminator solution. Which worked great until the latest update. Now resolution on the secondary is stuck at 640x480 (greyed out in Windows settings).

The primary and secondary are both HP laptops with AMD CPUs and graphics. The built-in display works fine. RDP works fine (except for RDP performance degradation over time, which is why I tried Multiplicity).

I tried uninstalling and reinstalling AMD drivers. I tried this with and without the HDMI terminator plugged in. I tried AMD's DDU for extra cleanup. Nope. Any ideas?

(on the plus side - Multiplicity solves the weird buffering/memory leak/fragmentation/something problem I've had with RDP for years; 3.6 lets me connect to my Microsoft Dev Kit, which 3.57 didn't. I'm not even sure the Dev Kit is supported (ARM64, Windows 11), but it works now. Well, for video. No audio yet)

multiplicity

2,190 views 3 replies

Reply #1 July 31, 2023 6:23 PM from

Stardock Forums Top

That sounds like a driver issue.

Multiplicity kvm mode will use whatever the resolution you are using on the computer you are controlling.

Reply #2 August 4, 2023 2:13 PM from

Stardock Forums Top

I agree that is sounds like a a driver problem. Has anybody else ever seen this with Multiplicity? Especially has anybody else seen this and solved it?

Reply #3 August 6, 2023 7:58 PM from

Stardock Forums Top

I have a workaround now - using a virtual monitor driver, as mentioned in https://forums.stardock.com/516591/page/1/#3876649

It doesn't explain or fix the issue, but provides an alternative that works. Who knows, the next Windows, AMD or Multiplicity update may fix the issue. It's been known to happen. . .

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