I thought I should let the community know about this. I submitted the bug report in January and as of yet, it is not resolved.
I am running into this very issue also. We recently updated our systems to Windows 10.
After speaking to Tier I and Tier II support, their answer is that it is not something their dev team can fix. The explanation I received is that Windows 10 is overwriting the third-party setting (third party being LogMeIn client).
Moving forward, I believe the only workaround is to disable the screen timeout function in Win10, unless LogMeIn is somehow able to fix this.
Just for clarification to other readers, the screen timeout is a separate setting from screensaver timer. From my testing, the screensaver setting was not overwriting the "blank screen" setting. The only time I ran into the issue of the blank screen failing on the remote host was when the screen timeout setting was set and the time elapsed. When I returned to my session, the "Blank Screen" setting was still highlighted like it is enabled, but it actually was not. You can see everything on the remote system's screen.
I'm experiencing the same problem well over a year since the original post. Perhaps the logmein people do not bother looking at the problems we are experiencing when posted in these forums? I can't believe that more people are not having the same problem. I'm running Windows 10 on my home computer and logging in using my iPad and the screen is not blanking despite the fact that I installed the add on that supposedly blanks the screen when I was prompted to do so, and when I log in on my iPad it states that the screen in blanked but I'm staring right at the computer and it is not blanked!
I was disturbed to figure this out as well. But my problem is even worse. The blanking option only works for single monitor workstations. It does not work for any of my 2 monitor workstations. It will say in the remote session that the monitors have been blanked, but they haven't at all. We tested this with a laptop connecting to a desktop through local wifi, cellular, and across an outside vpn. Didn't matter if power settings were set to never turn off the monitors, if you have a dual monitor setup with Win10, logmein can't blank the screens at all. This needs to be resolved sooner than later, otherwise I'll be moving away from LogMeIn and finding a solution that works correctly. We have PCI-DSS compliances we must follow and we went with LogMeIn because it provided that layer of compliance, but now it doesn't.
LogMeIn - are you kidding? This screen blank function does not work properly in various scenarios I have new monitors with DisplayPort connections to the computer. I use dual montiors - well have to keep them both ON for logmein to allow me to use mulitple monitors remotely - else it goes to a lower resolution and only one monitor. So need the ability to BLANK screen because have to leave monitors on. Please don't give lame excuses, find a fix and implement it.
I apologize for the delay in resolving the screen blanking functionality on Windows 10. As soon as we have an resolution update, we will share this with the Community of users.
The conern is Windows 10 has been out a very long time. Is this being actively worked on. It is a serious issue. Some systems like mine require the monitors to stay on in order to have multiscreen functionality when remote. But, the screens MUST be able to be blanked. It is a genuine security issue.
Our office has been having this problem for at least 6 months now with Windows 10 computers (single and dual monitor Dell XPS computers). We have contacted LogMeIn Support several times and they can't figure out the issue. This doesn't seem to be a priority for LogMeIn for some reason even though it is a major security issue. I can't use my LogMeIn to my office computer to perform work tasks because of this or have to turn my monitors off before I leave the office. Very serious security problem - hopefully LogMeIn starts to take this seriously very soon!
For those of us who have taken the time to report this issue there are many, many more who will not. They just may simply choose another vendor. Point is, this is not a mere inconvienience. It is a MAJOR problem that needs attention ASAP.