It is the direct reason why Skype for Business officially only supports a single high-resolution monitor for application sharing. The higher the resolution, the worse the problem. If the computer memory becomes fragmented as programs create and destroy objects they keep in it, 'it can become impossible for Skype to allocate enough contiguous memory to satisfy the need to store the display bitmap necessary for application sharing on high definition displays,' the engineers said. The memory address space for the buffer has to be contiguous and cannot be fragmented, the Nexthop team engineers explained. It's only Skype.Although 32-bit applications have two gigabytes of memory to play with in Windows, newer high-resolution 2K and 4K monitors result in very large buffers being required for Skype for Business application sharing. Is there something else I can look into? Video calls via Amazon Alexa App from User 2 to User 1 are working fine. I installed the UPNP plugin, but it doesn't help ether. (Also Pihole got disabled - no success)ĭuring the first 10 seconds of the Skype call there are a lot of incoming connections from the IP of User1 which are blocked by the general deny rule. Reflections 1:1: off (tried to enable - no success)Īll Skype domains are whitelisted on pihole. SPAMhouse Drop + eDrop on WAN (were disabled - no success)

GeoIP blocked countries on WAN (were disabled - no success) Private + bogon blocked on WAN (disabled both - no success) There is one WAN and one LAN port, WAN is connected to a cable modem which is in bridge mode. When User 2 changes the connection to mobile data on the iPhone, calls are working fine and there is no freeze. The error can be reproduced on mac and iOS official skype apps. Skype video calls can connect just fine, but after 10 seconds the picture freezes and 10-15 seconds skype drops the connection. User 2: Skype on iOS/macOS and opnSense (Proxmox KVM) + piHole (LXC) + Ubiquiti AP User 1: Skype on Amazon Echo Show and consumer router/access point Since Skype is quite popular, I can't imagine that this is a common problem so it seems that I have a configuration problem.

Drops skype app