///////////////// How to fix it ///////////////////Ī data race is causing the mouse and/or the camera to be moved to erroneous locations from receiving each other’s position values. YMMV with any such fix, this bug is naturally system-dependent, but the fault is entirely owned by SC2. only appear to fix the problem by reducing the frequency of certain events, making the underlying race condition less likely. the mouse is moved to the coordinates of the intended drag-scroll vector interpreted as an absolute position on the screen). This shows that the screen coords of the mouse cursor are being mixed in with the world coords of the drag scroll delta (watching the video, you can also see the opposite bug – my mouse is occasionally forcibly moved to near-center, i.e. Dragging from near the left edge causes a huge jump westward, etc. The further the mouse the bigger the jump. The jumps come at random, but they always move towards the direction of the mouse cursor from the center of the screen. You can see that there are rather frequent jumps. The result should be a series of very tiny, gentle movements, barely moving the screen. I slowly move my mouse around while rapidly toggling drag scroll on and off. Here is a video further explaining this horrible, horrible bug: The direction and magnitude come directly from the location of the mouse cursor on the screen with respect to the center. The jump vector is seemingly random, but isn’t. I can explain the problem and how to fix it: Here is another comment from the post I linked which talks more about how he think it’s possible to fix it: Here is a video which shows how the bug looks, as the link in original post doesn’t work: As all the previous posts with this problem say, decreasing the polling rate of your mouse helps a bit, but doesn’t remove the issue, and unfortunately still cost me few games when it happened during important fights of the game. I do not think that this is hardware related problem, because I happened to switch my gaming laptop few days ago, and exactly the same problem occurred in my previous one, and in the current one I’m using which is brand new. Some more info about the problems from myself: If needed, I’ll make another video myself. ![]() ![]() It happens more frequently/consistently with me though. I’m not sure if these people are experiencing the same bug, or different bugs with similar symptoms, as solutions that have worked for them haven’t worked for me.Ĭom/watch?v=HIoKqnEez9Q&list=FL7ZcMvH47QCaV9qgMHKHCuQ&index=26 Net/forum/tech-support/412485-mouse-jumps-but-only-when-dragging-the-screen I’m not the only one to have encountered drag scroll issues: System Manufacturer: Gigabyte Technology Co., Ltd.ĭevice Identifier: ĭriver Date/Size: 09:12:42, 18199872 bytes While the mouse is still in motion, press and hold the middle mouse button for drag scroll.After the game starts, quickly move your mouse.Set your mouse’s polling rate to 1000 Hz.The screen jumps as if you had set a camera location hotkey and used it to jump to it. ![]() It’s not a smooth jump, like you would pan the camera over. If the mouse is already moving when you press the middle mouse button, and you continue moving with the button held down, the screen jumps one or more screens. ![]() If the mouse is stationary when you press the middle mouse button, and then you move the mouse with the button held down, drag scroll functions as normal. At 125 Hz, the bug is still present, but the game is playable. At, 500 Hz, the occurrence of the bug is dramatically reduced, but still occurs sometimes. When the polling rate is at 1000 Hz, the game is unplayable. The mouse is already in motion when the middle mouse button is pressed. Using Windows 8, with both an HP VoodooDNA mouse, and a Logitech G700. Using drag scroll causes the screen to quickly jump one or more screens in distance from the intended spots. Set mouse polling rate to 1000 Hz, use drag scroll while mouse is already moving, screen jumps unexpectedly. net/forums/en/sc2/topic/11913192186 ) on how it works, as I experience exactly the same thing: This bug has happened to many people throughout the years before, so I’ll just copy info from one of the previous posts (us.battle. I noticed that approximately week ago I started experiencing drag scroll screen jump bug again, which was patched out before, but came back for some reason.
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