iMac 2014 5K Bluetooth Trackpad Problem after sleep

As a work around have you considered putting the display to sleep rather than the computer. Set the computer sleep to "Never" and set the computer sleep to the desired setting. This should handle your problem, I have used this method for years and find it much more reliable than dealing with computer sleep.

BTW, I noticed you did not mention any USB connected to the iMac, those could also be causing problems. If you have any connected I would recommend disconnecting them and testing.

Nirmalts - You're not alone. Exact same issue with my new iMAC 5K. Having used Yosemite on my old (late 2009) iMAC for a couple of weeks with no trackpad issues, I'm pretty sure it's a hardware issue with the new 5K. Hope we see a fix from Apple soon, it's a pain for sure.

Regards,

Hi again - yeah, same here and can reproduce the issue 100% of the time: If waking from deep sleep with ANY BT device, the issue occurs. There seems to be a failed power state that causes duplex operations to malfunction; hence you get the slowness, bearing of communication (power levels will not work correctly in display as they are not correctly transmitted), lack of scrolling and other features.

If I wake up via the power button, all is fine - also 100% of the time.

I think it's very unlikely this is a hardware issue, as it's clearly a matter of 'how' the card is woken up and initialized; and thus ought to be software fix.

I have opened a bug report with Apple and send the BT diagnostics report; lets hope this makes it into a .1 fix.

Not sure why it may not be happening to all 5k users.

There should not be any connection, but... are you using FileVault?

My config is 4Ghz i7, 32GB Ram, M295 X, 1TB Flash. Apple Bluetooth Software Version: 4.3.0f10 14890

I am on ac as well, but using an Apple Time Capsule as the AP.

I also tried re-install, SMC and PRAM reset. For what it's worth, the behavior is consistent and 100% reproducible. And I do use FileVault (so apparently not a factor).

Best

D

Hi all,

I want to submit my bluetooth magic mouse issue with my 5k iMac as well.

I just received my brand new 5k iMac yesterday. I did not install any new software so the system is bone stock out of the box. I found that after the system resumes from sleep, the magic mouse scroll functions fail. The mouse works however in the plain vanilla modes. The pointer tracking, click and right click works. The horizontal and vertical scroll functions failed after resume from sleep. The keyboard works as well. The problem is reproduceable 100% of the time:

1) Start from full off; verify mouse can scroll vertically and horizontally

2) enter sleep; verify no fan or HDD noise

3) resume from sleep; verify mouse’s scrolling functions are lost

4) i switch off the mouse and switch it back on to see it the scroll functions would recover. it did not. The only way to recover them is to perform a system restart.

Sometimes, after the scroll function failed, the Magic Mouse's configuration options in the System Preference disappeared, and is replaced with a plain vanilla mouse options (1 page instead of the original 2 pages).

I dug the issue deeper and examined the bluetooth status when the mouse scroll failed. Often both the Apple Wireless Keyboard and System Admin’s Mouse are both shown as disconnected, even though both clearly are connected (with the mouse only in vanilla mode). I can also see the color spinning wheel appears a lot and behaving as if bluetooth is thrashing itself to dead. I try to turn off the bluetooth but it will not turn off; indicating it is thrashing itself to death and not servicing my attempt to turn off bluetooth.

The only way to recover the scrolling function is to restart. Both the mouse and KB batteries are good. The machine has less than 10 hrs of use. Based on the symptom, it appears to be a bluetooth system software bug related to sleep and resume. Very frustrating for a brand new 5k iMac. I am not looking forward to having to haul the whole system to an apple store.

Searching the web I found many bluetooth mouse/kb/trackpad issues with Yosemite.

5k iMac, 27-inch, Late 2014

4GH Intel Core i7

8 G 1600 MHz DDR3

Radeon R9 M295x 4096 MB

3TB HDD

yosemite V 10.10

magic mouse and keyboard as shipped

Apple Bluetooth Software Version: 4.3.0f10 14890

bone stock with no newly installed software

so exactly the same behavior

Try waking the system via the power button versus BT device and see if the issue occurs then.

Count me in for new 5k iMac 27". I have been pulling my hair trying to solve this issue and was close to doing a clean install but glad to see this thread and that I'm not the only one.

I've done exactly as the OP mentioned.

SMC and PRAM reset

Removed all user profile login items that will open up.

Removed any adobe or 3rd party launchers

boot into safe mode to reset any settings.

no luck. It appears to be the bluetooth. It shows both my keyboard and trackpad as "not connected" and considers both the keyboard and trackpad as generic input devices. The keyboard hot keys for dashboard, mission control, brightness, volume, etc do not work. If you click on the volume up and down, those are now the hot keys for dashboard and mission control. This is definitely software and bluetooth issue.

Yes. My symptoms are very much like yours. Both KB and magic mouse when "not connected" behave like they are in a "basic mode of last resort" so the user is not dead in the water. The special function keys becomes dashboard and mission control like you saw. My BT controller took a very long time to report the mouse, then the KB are "not connected". This delay probably have to do with the performance of the CPU. I have i7.

Really smell like some obscure bug that precipitates with certain system configuration. Agree with you this smell like host BT, driver, related to power management. This really stinks.

I called Apple support and took forever to get thru. No help.

I am pretty disappointed with this problem brand new out of the box.

second the bug report comment; and include your BT diagnostics report for Apple when you report (option-click on the BT symbol at the top right when the problem happens!). The more bug reports are files, the quicker this will get priority for a software update.

vsopdx, I don't think this is related to the cpu used; the broadcom controller for BT is the same on all configurations. As nirmlalts says, please post your config so that we can compare and look for any similarities, since we have to assume not all users have been affected.

Thanks for suggesting try to wake the system using the power switch instead of the BT kb or mouse/touchpad.

Yes! I just did the tests. I put the system into sleep. I set a timer for 10 min to be consistent before I wake the system. I did this because if the system is not in deep sleep, the symptoms do not occur.

If I wake the system with the power switch, the mouse and KB works fine. If I wake the system with the KB, they go kaput, and revert to "basic functions".