Created attachment 1112873 [details]
debug log of the server showing the succesfully failed session

Description of problem:
mingw-virt-viewer sometimes doesn't show guest display when opening connection in full-screen and instead stays black with "Connected to graphic server"


Version-Release number of selected component (if applicable):
virt-viewer-2.0-128
(spice-client-msi-3.6-6)
with respective usbdk

How reproducible:
~ 10 %

Steps to Reproduce:
1. 64-bit Windows 7 client; RHEL7.2 guest (with native usb) and RHEL7.2 host
2. Try connecting to the guest from user portal (preferably using browser plugin) with full-screen enabled
3. If that works as expected, try enabling/disabling USB auto-share (probably not really necessary) and connect again.
5. If that works, try again.
6. If it still hasn't failed, then wait a few minutes and repeat 

Actual results:
One of the connections won't show the guests display.