19510 Views Previous 1 2 3 4 Next 55 Replies Latest reply: Jun 22, 2008 3:47 PM by Allen Watson1 Go to original post
From the UserEventAgent man page:
The UserEventAgent utility is responsible for loading plugins that provide for system response to user-generated events.
That's pretty cryptic, and the plugins it loads (from /System/Library/UserEventPlugins) are:
I don't suppose this is helpful in answering the "do I need this?" question.
I am getting this as well. Upgraded from 10.4.10 and I thought perhaps it was some incompatible third-party software causing it.. but people in this thread have done clean installs and still get it?
In my case the process is responding but constantly using 100% cpu, same problem as others have mentioned about not being able to reboot.. it just beachballs.
While UserEventAgent is at 100% cpu, Airport regularly drops out and reconnects (every 1-2 minutes), and if I'm typing at the same time, my key-repeat becomes hyper sensitive and I end up with lines and lines of the same character.
Since not everyone is experiencing these symptoms, I wonder if we all share a similar peripheral? It seems to happen shortly after I (un)plug USB mouse/keyboard/hub .. but it's possible that's just co-incidence.
I'm using some no-name hub, a Kinesis Freestyle USB keyboard and a Logitech LX7 cordless mouse. I also have a bus-powered external 2.5" USB2.0 disk. I'm going to try a fresh boot and introduce all of these one by one and I'll post if I find anything interesting.
I am also going to try switching to wired ethernet and turning off bluetooth.
If you have any more info on this problem, please share!
Good idea, lets get a profile of the systems that are having problems.
I am using an iMac core duo, the first intel iMac. 2 gigs of Apple ram. I also run a dual monitor setup.
I have a Logitech MX Revolution mouse and a Wolfking Timberwolf keyboard. Neither of these had any driver software installed.
I also have a Belkin USB hub, and a Logitech USB Microphone.
Bluetooth is on but not paired to anything, and airport is disable. I used a wired connection.
For those of you who are seeing 100% CPU usage and performance issues, here's an update:
In my case (see my previous post for background), I've narrowed it down to a conflict between one of the UserEventAgent plugins (AppleHIDMouseAgent.plugin) and my USB keyboard (Kinesis Freestyle).
I edited /System/Library/LaunchAgents/com.apple.UserEventAgent-Aqua.plist and changed the command-line arguments for UserEventAgent to include -v (verbose logging to stderr) and -d (runs each plugin in a separate thread).
The -v option did not produce anything interesting. The -d option helped though.
Following a fresh reboot with no peripherals plugged in and no applications loaded, the system idles as normal. The moment I plug in my USB keyboard (to either USB port), the UserEventAgent process running AppleHIDMouseAgent.plugin jumps straight to 100% CPU and stays there even after I unplug the keyboard. The only way out that I've found is power-cycling. I also tried booting up with the keyboard plugged in with the same results.
All my other USB devices work fine (Logitech LX7, Hub, HDD, Flash drive), although I do not have another USB keyboard to test with.
While stuck at 100% CPU, watching the inspect pane in Activity Monitor for the AppleHIDMouseAgent.plugin shows the number of faults growing at around 100K+ per second, context switches at 1 per second, while all other fields remain static.
The version of my AppleHIDMouseAgent.plugin (taken from version.plist):
I no longer use the Apple mouse so I've been able to fix the issue in my case by moving the plugin out of /System/Library/UserEventPlugins. After about an hour of testing, everything seems to be working fine.
I have this problem too. I've tracked it down the the Kinesis Freestyle keyboard. Basically, the UserEventAgent process pegs at 99% when I plug this device in either through my USB hub or directly to my macbook pro. I have an older iMac G5 with 10.5 and the same thing happens when I plug the Kinesis keyboard in.
Damon Uyeda wrote:
I have this problem too. I've tracked it down the the Kinesis Freestyle keyboard.
Interesting! Michael Wertz1 mentions he has the same problem too, although not with a Freestyle but another non-Apple keyboard.
I've filed a bug report with Apple on this, and referenced this thread in my report. If anyone else has the same problem, it might pay to add your 2 cents here, and/or file a bug report (bugreport.apple.com).
FWIW, the workaround I posted above has been working fine for me all day now.
Looks like you nailed it. On my testing partition I unplugged my keyboard and booted to it. Things were fine until I plugged the keyboard in, then UserEventAgent shot back to 100% and stayed there even after I unplugged it. Its definalty a problem with the keyboard.
I removed AppleHIDMouseAgent.plugin and turned UserEventAgent back on for my main partition, and so far things are fine. UserEventAgent is running with a very small footprint. That is clearly what is causing my issue. I dont use an Apple Mouse either, is that all that plugin is for?
I dont use the same keyboard you guys were talking about. The really odd part is my keyboard requires no drivers to work. Here is a link to what I use (and I cant say enough about it as an awsome gaming keyboard): http://www.amazon.com/WolfKing-DK2588U-Timberwolf-Gaming-Keyboard/dp/B000F0E2Z4
I am going to pass on what I learned to the rep I worked with. Nice work tracking it down.
I also have this problem. Whenever I connect my Kinesis Freestyle USB keyboard to my MacBook Pro, the CPU goes to 100% because UserEventAgent uses all the CPU (according to Activity Monitor). Even after removing the keyboard, the problem persists.
I'm not too happy with the workaround, because it seems that I must be losing some functionality---there must be some other option? I have also filed a bug report with Apple.