On System Preferences screen, click on the Bluetooth icon.ģ. Click on Apple Icon in top-menu bar and select System Preferences in the drop-down.Ģ. It is most likely that most Keyboard problems on MacBooks are due to glitches in Bluetooth.ġ. On the Accessibility screen, uncheck Sticky Keys and Slow Keys. Click on Apple Icon > System Preferences > Accessibility.Ģ. Make sure that the problem is not due to Slow and Sticky keys being enabled on your Mac.ġ. If this does not help, you can go for a SMC Reset using steps provided in this guide: How to Reset SMC On MacBook, Mac Mini and iMac. Wait for 10 seconds and press the Power button to restart your Mac. Note: Continue holding the Power button as Apple Logo appears on the screen and release the Power button as soon as Apple Logo disappears from the screen.Ĥ. Press and Hold the Power button on your Mac, until Apple Logo appears on the screen and goes away. Unplug all accessories from your Mac and wait for 10 seconds.ģ. ![]() Click on Apple Logo > Shut Down and wait for your Mac to completely shut-down.Ģ. This method is known to fix the problem of Spacebar key and other specific keys not working on newer versions of MacBook (2018 and later).ġ. Remove all the USB connected devices from your Mac (Except Keyboard and mouse dongles) > Restart your Mac and see if the problem is now fixed. Remove USB Connected DevicesĪs mentioned above, the problem could be due to intereference from USB 3.0 devices attached to your Mac. The same solution should work on Dell, Logitech and other brand keyboards. Users have reported fixing Laggy Magic Keyboard by simply turning OFF the keyboard and turning it back ON again. Now try using a High DPI mouse and a 4K external display and a published application like MobaXTerm and you'll begin to realise just how painful this experience is.Going by our experince, this problem appears to be due to interference from USB 3.0 devices. The Windows client is less problematic regarding the ordering of input events - but the performance is still terrible.Ĥ. The Mac client is still subject to out-of-order processing of mouse events. The only solution is to use a standard mouse or trackpad device. I can replicate this on both Windows and Mac. This performance issue is equally bad as the 4K display issue, but will occur on any screen. I am specifically using a Roccat Kone Pure. and you will again observe performance tanking once again. This behaviour continues to occur on the Mac client, regardless of wether the desktop is extended or not.ģ. Performance is improved by ensuring the laptop screen is disabled, and the 4K external display is the only dispay in operation.Ģ. We can replicate the same behaviour using the WIndows Horizon Client, when connected to a 4K external monitor - but only when the desktop is in extended display mode. Kdenike I cannot guarantee our administrators will explore this issue any further, so I'm going to hope that you can raise this internally.Ī few more data points for you on this (It turns out I'm really good at breaking things).ġ. Click events should occur only where the physical mouse pointer is positioned, not where the virtual mouse pointer is. Never allow click events to be processed out of sequence with move events.ģ. Find a better way to deal with published apps that heavily poll the event queue / message pump.Ģ. I can not work with a non-deterministic user interface.ġ. Input events "must not" be delivered out of sequence, I don't care how bad the connection is, or how much load the Horizon client is under. It means that when I move the mouse from A to B and then perform a click or drag action - the click/drag event will be processed before the move action and register the event "somewhere between A and B" instead of where it actually ocurred (at B). It has become evident that while the mouse pointer movement is laggy, mouse click events are not - and will in fact be delivered out of sequence. ![]() I also observed particularly high CPU utilisation at such times, suggesting that Horizon is unable to keep up with the event/message processing that MobaXterm requires. it was entirely unusable (for reasons that remain unknown). The most problematic published app is MobaXTerm - which for whatever reason, seems to drive the message/event queue pretty hard as soon as it even gets a sniff of the mouse pointer. In each case, the behaviour was the same. ![]() We also tested with PCoIP as well as BLAST. I'm using Horizon Client 4.5.1 and I've tested using multiple internet connections - some better than others. Issues such as the mouse pointer sometimes trailing far behind the actual mouse, by a matter of seconds. I've had some particularly bad mouse-lag issues with Horizon recently when using certain published applications.
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