Hot Corners & Expose Stop Working (Until Restart)

orvn

macrumors 6502
Original poster
Jan 11, 2011
255
0
Toronto, Canada
So ever since I got Mountain Lion, I've been having this issue.

When I first start up my machine, my hot corners (set to exposé, show desktop and dashboard) work.

Then, inevitably, a few hours later they just stop working.

The F3 button on my MBP (unibody core2duo mid-'09) doesn't trigger the exposé and my four-finger trackpad swipes don't work either.

Killing the windowserver process, logging out/in or restarting fixes the issue, but each time I fix it I know it will just occur again.

Sometimes it occurs within an hour, sometimes it takes a day, but it happens every time.

My hot corners + expose + trackpad gestures are all configured correctly in prefs.

Ideas?
 

johannestietze

macrumors newbie
Aug 11, 2012
8
0
same same

I got the same issue with my iMac....driving me insane...plus it does not mount NTFS 3G formatted external HDD anymore.......
start up time is endless....as is shut down time.....
thinking about going back to Snow Leopard...was working like a fiddle with that......
 

steadivision

macrumors newbie
Nov 6, 2006
5
0
Screen Saver

Taking a hint from another forum, I disabled my screensaver.

Everything seems to be working now.

Chris
 

Preclaro_tipo

macrumors regular
Dec 6, 2003
170
181
West Lafayette, IN
Hot corner work around

I have the same problem with hot corners that stop working, randomly.

I get around this by going to system preferences and toggling hot corners to another function and back, the close Sys. Prefs. and they start working again. At least you shouldn't have to restart.
 

petersays

macrumors member
Nov 2, 2007
42
0
Sweden
Same problem here. Screensaver disabled, have tried changing function back and forth - but no luck. Please adress this Apple!
 

Wolfgeek

macrumors newbie
May 13, 2010
2
0
Same problem here on my early 2008 Mac Pro. Killall Dock fixes the problem (temporarily for me).
 

SteveW928

macrumors 68000
May 28, 2010
1,639
1,201
Victoria, B.C. Canada
Mt Lion and Snow Leopard here...

Oddly, the first time I've run into this was today on my wife's laptop (snow leopard). She has never complained of it before and I ran SL for years on a number of different systems. Then, just a bit ago, it happened on my, fairly new, Mt. Lion based mini. So, I found this thread, and sure enough, changing prefs and then back fixed the problem (we'll see about temporarily). I'm not sure if that will fix the SL laptop or not yet. Quite odd. (And, it hasn't happened on Mt. Lion until tonight... and I've been running it for a couple months now. I'm also a HEAVY expose user, so I'd have noticed.)
 

D-a-a-n

macrumors regular
Mar 22, 2010
160
18
Whenever it happens again, try opening up Terminal and type the following command:

Code:
killall Dock
Hit enter. That seems to be an easier fix than restarting the whole computer. At least for me anyway.
It just works. ;)
 

Preclaro_tipo

macrumors regular
Dec 6, 2003
170
181
West Lafayette, IN
Hot corner == Hot sides

My lower-left corner is assigned to the desktop. When hot corners "break" which is usually after waking from sleep, the new hot "corner" is about 1/4 or 1/3 'up' from the lower left corner along the left edge of the screen, really weird.

My upper right corner is assigned to Notifications, I haven't found any evidence of a new hot spot location for that corner as I did with the lower left corner.

(FWIW, my dock is also along the left side of the screen)
 

Dodgepodge

macrumors newbie
Apr 4, 2013
1
0
Philippines
I just got this problem now and I'm on 10.8.3, but
Code:
killall Dock
fixed it. Thanks for the tip. :)

(I just registered to reply that I got this issue.)
 

Krazy Bill

macrumors 68030
Dec 21, 2011
2,985
3
Whenever it happens again, try opening up Terminal and type the following command:

Code:
killall Dock
Hit enter. That seems to be an easier fix than restarting the whole computer. At least for me anyway.
Or... for the terminally challenged you can just go into system preferences, change the hot corner to something else, then back again. Hot Corners will function again.

This happens about every other month for me. The "quirk" has been happening since Leopard.
 

3bs

macrumors 603
May 20, 2011
5,426
19
Dublin, Ireland
I started getting this problem on my Late 2013 13" rMBP. I'm not sure when it started but I'm on 10.10.3 right now. Only way to fix it is change hot corners in settings or killall dock in terminal.

The weird thing is it happens randomly and if I ignore it, it'll fix itself and then come back again randomly. Even weirder is only top right, bottom left and bottom right corners stop. My top left corner never stops working. I tried changing the actions of the hot corners around but it was the same corner that kept working when others stopped. My dock is on the left in case that matters.

Anyone have a permanent fix?

PS sorry to revive a somewhat old thread.
 

nperspective

macrumors newbie
Feb 23, 2016
1
0
Whenever it happens again, try opening up Terminal and type the following command:

Code:
killall Dock
Hit enter. That seems to be an easier fix than restarting the whole computer. At least for me anyway.
EXCELLENT. This worked for me!