Macbook Air 2012: intermittent, random freezes of trackpad and keyboard lasting a few seconds each

There have been a few other people to have reported this problem, but there has been no consistent solution for me on my Macbook Air 13" 2012, running 10.8.4.
What happens is this: while typing, the built-in keyboard and trackpad will suddenly lock up at the same time, randomly, intermittently, and for just a few seconds before returning to normal. This has been true through all the updates of 10.8.x since I bought the system last year.
During the freeze, one of the three behaviors occurs:
1) both keyboard and trackpad are completely unresponsive
2) both keyboard and trackpad get really slow, with high latency. Keys pressed show up much later or have to be pressed several times before registering. Trackpad is jumpy if it moves at all.
3) key gets stuck, sometimes the BACKSPACE key, which usually results in several dozen emails getting deleted or entire paragraphs, or rows and rows of the same stuck key. Pressing other keys does nothing.
I've spoken online with various other people who have the same problem and confirmed that the built-in keyboard and trackpad seem to be joined together whenever this problem strikes. You never see one freeze without the other also freezing.
Also, these commonly-recommended solutions don't work:
a) Reset PRAM. Done this many times. Does nothing.
b) Bring it in to Apple. Did this too. They replaced the keyboard and trackpad but the problem remains.
c) Clearing caches in safe mode. No improvement.
d) Removing "com.google.keystone.deamon.plist" and "com.google.keystone.agent.plist" doesn't seem to work either, even though the errors and behavior are exactly the same for me as for george.e.gonzalez in this thread: https://discussions.apple.com/message/19702976#19702976
These files do come back, though, thanks to Google Software Update. The keystone software appears to be part of Google Chrome, although I cannot confirm this.
e) I DO have Google Android File Transfer installed like one other person reported; they said uninstalling it fixed the problem. Unfortunately, that has not worked for me. Also, Android File Transfer is installed (same version 1.0.50.2266, same Mac OS 10.8.4) on an older 2008 Macbook, and it works fine, which points to something on just this Macbook Air as being the cause.
f) I don't use the Radio Silence firewall app--can't remove it.
g) I don't have the telldus device or whatever it is, so I don't have the "com.telldus.service.plist" to remove.
h) Completely clearing out /Library/LaunchAgents, /Library/LaunchDaemons, and /Library/StartupItems doesn't do anything.
i) Repairing permissions or repairing the volume does nothing.
j) Reinstalling the OS fresh does nothing.
k) I don't have an external trackpad, mouse, or keyboard for testing while the freezing happens, but the machine itself seems to be working, just not the built-in input devices, which are on the same USB bus.
l) Pressing ESC does not stop the key stuck situation, as it does for some people.
It feels to me like a hardware problem, not an OS problem, and it feels like a USB bus issue. I have noticed that when I insert USB flash drives, I get the same lock-up for a few seconds, something which my other Macs don't do.
I've also noticed various USB errors in the Console around the same time (same as george.e.gonzalez):
7/26/13 1:20:04.000 AM kernel[0]: AppleUSBMultitouchDriver::_deviceGetReport - DeviceRequest for reportID 0x0 returned with result 0xe000404f - retrying
7/26/13 1:20:05.000 AM kernel[0]: USBF: 844075.636 AppleUSBEHCI[0xffffff80157f1000]::Found a transaction which hasn't moved in 5 seconds on bus 0x1a, timing out! (Addr: 2, EP: 0)
But I'm not able to precisely correlate these errors to the pause.
Is anybody else having this problem that can shed more light on it than these other suggested repairs? This has been frustrating for quite a while, but I've had the stuck BACKSPACE key delete hundreds of emails on a webmail platform that I was unable to recover using Undo and out of the trash, and that's just no longer tolerable...
Thank you, thank you, thank you, if anyone can help me fix this!

Hi, Dan--
Nope, none of those four... I do have Dropbox but never installed it on this machine. The other three are services I've never signed up for.
I am basically using these apps up-front:
Mail.app, Safari, Notes, Terminal, maybe LibreOffice 4.0.x, maybe Sublime Text 2, Console.
And the freezes happen about twice a day, usually when I'm in Mail or Terminal, but that's because those are the ones where I'm typing the most and can see immediately when the freezes happen. It could be happening even more frequently while I'm browsing, but I might not know it because I'm merely reading what's on the screen.
This is a list from Activity Monitor of what I'm using right now, which is very typical of what I use all day:
407
XType.FontHelper
dchang
0.0
2
2.8 MB
Intel (64 bit)
278
xpcd
dchang
0.0
2
5.0 MB
Intel (64 bit)
313
WebKitPluginAgent
dchang
0.0
2
944 KB
Intel (64 bit)
250
usernoted
dchang
0.0
2
4.0 MB
Intel (64 bit)
233
UserEventAgent
dchang
0.0
3
7.6 MB
Intel (64 bit)
347
Terminal
dchang
0.0
5
51.3 MB
Intel (64 bit)
280
tccd
dchang
0.0
2
3.8 MB
Intel (64 bit)
243
talagent
dchang
0.0
2
6.2 MB
Intel (64 bit)
244
SystemUIServer
dchang
0.1
3
26.5 MB
Intel (64 bit)
4254
System Preferences
dchang
0.5
3
24.8 MB
Intel (64 bit)
995
Sublime Text 2
dchang
0.0
12
82.5 MB
Intel (64 bit)
380
ssh-agent
dchang
0.0
3
3.0 MB
Intel (64 bit)
4321
ssh
dchang
0.0
1
2.0 MB
Intel (64 bit)
4276
ssh
dchang
0.0
1
2.0 MB
Intel (64 bit)
335
ShareKitHelper
dchang
0.0
2
9.1 MB
Intel (64 bit)
429
ScopedBookmarkAgent
dchang
0.0
2
5.0 MB
Intel (64 bit)
318
Safari Web Content
dchang
2.1
23
835.4 MB
Intel (64 bit)
316
Safari
dchang
0.2
17
127.9 MB
Intel (64 bit)
3975
QuickLookSatellite-general
dchang
0.0
4
6.0 MB
Intel (64 bit)
3974
Quick Look Helper
dchang
0.0
4
6.4 MB
Intel (64 bit)
3978
QTKitServer-(3975) QuickLookSatellite-general
dchang
0.0
2
3.7 MB
Intel
319
QTKitServer-(318) Safari Web Content
dchang
0.0
5
8.2 MB
Intel
3979
QTKitMoviesValidator-(3978) QTKitServer
dchang
0.0
3
5.3 MB
Intel
359
printtool
dchang
0.0
2
5.4 MB
Intel (64 bit)
327
pbs
dchang
0.0
4
3.7 MB
Intel (64 bit)
249
pboard
dchang
0.0
1
904 KB
Intel (64 bit)
254
Notification Center
dchang
0.0
3
18.4 MB
Intel (64 bit)
676
Notes
dchang
0.0
9
47.1 MB
Intel (64 bit)
277
NetworkBrowserAgent
dchang
0.0
3
4.4 MB
Intel (64 bit)
4156
mdworker
dchang
0.0
3
11.7 MB
Intel (64 bit)
298
Mail
dchang
0.0
11
151.5 MB
Intel (64 bit)
302
lsboxd
dchang
0.0
2
3.4 MB
Intel (64 bit)
54
loginwindow
dchang
0.1
2
25.8 MB
Intel (64 bit)
3589
LibreOffice
dchang
0.2
6
105.9 MB
Intel
230
launchd
dchang
0.0
2
1.4 MB
Intel (64 bit)
469
iTunes Helper
dchang
0.0
3
3.8 MB
Intel (64 bit)
258
imagent
dchang
0.0
3
5.3 MB
Intel (64 bit)
3508
Image Capture Extension
dchang
0.0
3
9.7 MB
Intel (64 bit)
3980
helpd
dchang
0.0
2
2.0 MB
Intel (64 bit)
270
fontd
dchang
0.0
2
6.5 MB
Intel (64 bit)
322
Flash Player (Safari Internet plug-in)
dchang
1.7
21
255.7 MB
Intel (64 bit)
245
Finder
dchang
0.1
5
73.1 MB
Intel (64 bit)
242
Dock
dchang
0.0
3
43.1 MB
Intel (64 bit)
234
distnoted
dchang
0.0
4
4.1 MB
Intel (64 bit)
3550
Dashboard
dchang
0.0
8
24.5 MB
Intel (64 bit)
663
cookied
dchang
0.0
2
3.4 MB
Intel (64 bit)
499
Console
dchang
0.0
2
26.8 MB
Intel (64 bit)
326
com.apple.NotesMigratorService
dchang
0.0
2
10.9 MB
Intel (64 bit)
4328
com.apple.iCloudHelper
dchang
0.0
3
5.5 MB
Intel (64 bit)
685
com.apple.hiservices-xpcservice
dchang
0.0
2
2.5 MB
Intel (64 bit)
315
com.apple.hiservices-xpcservice
dchang
0.0
2
2.5 MB
Intel (64 bit)
279
com.apple.dock.extra
dchang
0.0
2
13.9 MB
Intel (64 bit)
320
com.apple.audio.SandboxHelper
dchang
0.0
2
2.6 MB
Intel (64 bit)
3976
com.apple.audio.SandboxHelper
dchang
0.0
2
2.6 MB
Intel (64 bit)
3977
com.apple.audio.ComponentHelper
dchang
0.0
2
2.7 MB
Intel (64 bit)
321
com.apple.audio.ComponentHelper
dchang
0.0
2
2.9 MB
Intel (64 bit)
236
cfprefsd
dchang
0.0
4
11.6 MB
Intel (64 bit)
262
CalendarAgent
dchang
0.0
6
22.5 MB
Intel (64 bit)
4318
bash
dchang
0.0
1
1.2 MB
Intel (64 bit)
4121
bash
dchang
0.0
1
1.2 MB
Intel (64 bit)
329
AppleSpell.service
dchang
0.0
2
14.8 MB
Intel (64 bit)
261
AppleIDAuthAgent
dchang
0.0
3
2.0 MB
Intel (64 bit)
4330
Activity Monitor
dchang
2.5
5
17.9 MB
Intel (64 bit)
272
accountsd
dchang
0.0
2
3.5 MB
Intel (64 bit)
At this time, the only thing generating errors in the console log is the now-famous "coreaudiod[246]: Enabled automatic stack shots because audio IO is inactive" error that is considered normal behavior...

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EtreCheck version: 1.9.12 (48)
Report generated 5 August 2014 18:45:56 BST
Hardware Information:
MacBook Air (13-inch, Mid 2012) (Verified)
MacBook Air - model: MacBookAir5,2
1 1.8 GHz Intel Core i5 CPU: 2 cores
4 GB RAM
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EFI (disk0s1) <not mounted>: 209.7 MB
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Remove the machine from your list of registered products. If it's still covered by an AppleCare Protection Plan, transfer the coverage to the new owner by following the instructions in the AppleCare Terms and Conditions (under the heading "Transfer of Plan.")

After start Windows 8 on Macbook Air (late 2011) all freeze.

When I start Windows 8 on Macbook Air (late 2011) all freeze. If I switch off Wi-Fi adapter or power unit problem does not exist. Do you have same problem?

Here's how to fix the problem.
Macbook air 2011 freeze fix
1. Install Windows using Boot camp on battery power (AC adapter unplugged).
2. After the installation, right click on the power icon.
3. Click More power options
4. Click change plan settings for the balanced plan
5. Click change Advanced power settings
6. Select "PCI Express"
7. Selct Link state power management
8. Change Plugged in from Moderate to OFF.
Done! No more crashing. Now you can plug in your AC adapter.

I have a new Macbook Air 2012, Apple TV 2 and I have tried wired and wireless connections both result in stuttering during video airplay to the ATV2.

I have a new Macbook Air 2012, Apple TV 2 and I have tried wired and wireless connections both still result in stuttering during video airplay to the ATV2.
I have even bought a new Airport Extreme Router just to confirm it is not the router and it still didn't help.
I have brought all items in the same room with wired connections and still same issue.
I was thinking maybe ATV 3 might help since it has 2 wifi antennas and faster processor.
Have tried everything I could think of.
This was one of the main reasons I bought a Macbook Air for this airplay feature. Very frustrated.
Any thoughts; any other suggestions would be greatly appreciated.
Thanks

Thanks for the suggestion.
I also disabled Norton Firewall and restarted the Air and Now I'm able to use Air Play.
I know that the Apple remedy said that to do that in the support article, but I totally forgot I had that enabled..
It actually works. I can even stream to the Apple TV now through my MacBook Air.
BTW, Go into setting under the ATV, and click on update...you'll see that there was another update avaialble for the last gen of ATV...
It does have to restart twice..I guess once to download and and nother to apply.

Can MacBook Air (2012) handle 1920x1080 resolution on external display?

Hi there,
I was currently thinking about buying the following external display:
http://www.amazon.co.uk/LG-E2251VR-inch-Widescreen-Monitor/dp/B0060LCBTG/ref=cm_ cr_pr_product_top
I have read mixed things about connecting macbooks to external displays so wanted to ask the following:
1. Firstly can the MacBook air 2012 handle an external monitor with resolution 1920 x 1080 @ 60Hz?
2. Secondly, I have heard some Macbooks, with some cables (predominantly HDMI), don't give the option of 1920x1080 when plugged in, instead cap it at around 1600 leaving the external screen blurry. Which connection is best to get the full 1080p resolution, DVI, VGA or HDMI?
Thanks for any help you guys can offer!
Rob

Thanks for your responses!
Captfred - I've tried plugging it into my friends screen now using my minidisplay to HDMI cable and the following options show up:
1080i
1080p
720p
1600x1400
1440x900
etc etc
Is the 1080p option 1920x1080? If I choose the 1080p option, the resolution looks nice and has large real estate on there, the only thing is if I full screen it the top and bottom are cut off? Is this a problem with the aspect ratio of the screen do you think?
Thanks again

What chords do i need for a data migration from macbook 2008 to macbook air 2012

My 2008 macbook has a firewire port and my new macbook air 2012 has a thunderbolt port. I have a thunderbolt cable but i can't find an adapter to firewire or the firewire cord? Should I return the thunderbolt cable and surrender the 100 bucks for one-on-one or go through the tedious process of using my external hard drive as the 'messenger boy'?

There's all sorts of ThunderBolt to FireWire adapters out there. Here's one on Amazon. http://www.amazon.com/Apple-Thunderbolt-to-FireWire-Adapter/dp/B008RXYOKY/ref=sr _1_11?ie=UTF8&qid=1346277186&sr=8-11&keywords=thunderbolt+firewire
You'd also need a FireWire 800 to 400 adapter. http://www.amazon.com/elago-FireWire-400-800-Adapter/dp/B002TF0ZDQ/ref=sr_1_8?ie =UTF8&qid=1346277133&sr=8-8&keywords=thunderbolt+to+firewire

Macbook Air 2012: intermittent, random freezes of trackpad and keyboard lasting a few seconds each

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