Couldn't focus game window

doviende·1/21/2018, 7:14:46 PM·3 votes·1,404 views

Summary:

  • I loaded into the game properly, received all events, but could not focus the window or send any events. Wild guess is it's related to new USB driver?

Greetings, I played several games today successfully, but in my latest ranked 3v3 I was unable to play the game for a good 10 minutes because of this problem. The major symptom was that in-game, my mouse was still the "Windows mouse" (white with black outline).

  • Could not type
  • Could not move
  • Could not hot-key level up first spell
  • Could not buy
  • Could not do any interaction with the game window at all

At the time, interaction with every other window was fine. I could load web browser, I could talk in discord, I could type in the league client program, I just couldn't do anything when I alt-tabbed back to the game window (which was full-screen).

System info:

  • Windows 10 Pro, installed a couple weeks ago on fresh hard drive
  • two monitors
  • league loads full-screen in main monitor
  • never seen a problem like this in all my years playing.

Attempts to fix:

  • right-clicked on task bar and "close window" --> in-game it would pop up that alert about "you are needed, are you sure you want to leave?" but I couldn't click the buttons to say yes.
  • Task Manager - End Process --> killed game window and reconnected perfectly, but still the same problem, couldn't focus the window to do anything. (i tried this step several times, no luck)
  • Finally: reboot computer. This worked.

Wild guess as to cause:

The only thing in this whole scenario that I can think of that was different in between my functioning games this morning, and this broken one, was that in between I plugged in my camera via USB. Nikon Coolpix P900. I assume it installed something, because it said "device is ready to use" (since I haven't plugged in that camera since my re-install of Windows 10 Pro a couple weeks ago).

  • there was no camera sync happening
  • there was no camera software running

So my wild guess (and intuition as a software developer) is that the USB plug-in action plus installing a driver caused some weird interaction with the later start-up of full-screen lol that led to no mouse/keyboard events going to lol.

Follow-up:

I plugged in my camera again, and loaded a custom. No problems. So at least this means that the camera itself doesn't cause it, but doesn't rule out the driver install.

6 Comments

Greered1/21/2018, 8:26:05 PM3 votes

The exact same issue happen to me twice now, League of Legend launch fullscreen on my first monitor but my cursor remain the default white mouse and I just couldn't do anything in-game. I just lost/AFK two games because of that. I didn't know that restarting my computer fix the problem....

My system info:

  1. Windows 10 Home
  2. Two Monitors
  3. Intel(R) Core (TM) i7-4700HQ CPU @ 2.40GHz
  4. 16 GB RAM
  5. Nvidia GeForce GTX 860M

This issue never occurs to me before this week and I didn't install or plug anything new on my computer.

Dramonic2/7/2018, 8:16:17 PM1 votes

exact same issue here

SchoolGurlAhri2/8/2018, 5:12:57 PM1 votes

I'm also having this issue, reboot fixed it as well

CamilleMeta2/28/2018, 5:25:42 PM1 votes

I had the issue too. When i closed Discord, it worked.