Slow login with dual monitors |VMware Communities

I didn’t see the original posters question before I wrote up my own version of essentially the same question.   I’ll post it below, it may have some additional information.




I was doing some login timings this morning and I noticed something very odd, depending on my monitor arrangement the login times to a desktop can vary by as much as 500%.  Really.


For background I’m testing with three monitors, one is a laptop display and the other two are 2560 x 1440 displays. We’re on View 7.9 with UEM 9.8, the desktop is 1903 with nothing but the basics (Office).  This is a test pool with a manually assigned machine, I’m sitting next to the datacenter. 


My best time is using only the laptop display, I can go from disclaimer acceptance to desktop in 11 seconds (doing the same test without UEM brings it down to 9 seconds).  When I change from the 1920 x 1080 laptop display to one of the other monitors the time jumps to 12.7 seconds.  Again, for this test I’m only using a single display, the only thing I changed was which monitor the View desktop displayed on.


If that’s as bad as it got, I could live with it…however it gets much worse.  When I use the two standalone monitors the time jumps to 51.3 seconds.  For a setup with all three displays the login time again jumps, this time to 56.7 seconds.


My thorough testing was all done with Blast, however spot testing with PCoIP shows that the problems exists there as well. The timings are similar between Blast and PCoIP with PCoIP being slightly slower on the single monitor logins, and PCoIP being slightly faster on the 3 monitor test.


The only thing I’m changing is the number of displays and that led to a dramatic, I would say unusable increase in login time. I ran each test three times and then averaged the timings.


Does anybody know what’s going on and/or how to fix this issue?


As an aside, I utilized the logon monitor to try to determine what’s up, however whatever the issue, it is not being captured by the logon monitor.  A good portion of the delay seems to be happening prior to the logon monitor starting to collect data.  The amount of time not captured by the logon monitor varies from 8 seconds to 25 seconds, the amount of time being lost is proportional to the overall logon delay.

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