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hub 2-0:1.0: over-current change on port 4
hub 2-0:1.0: over-current change on port 3
hub 2-0:1.0: over-current change on port 1
in one day the log file is 25 mb
The strange part is that normally i have one message every 30 seconds........but for example when i'm compiling a software i have 1-3 messages per second.
You don't mention which kernel you are using, but this was a bug in older kernels. It has been corrected. If you are running the most recent kernel, then make sure you are not exceeding the power draw permitted by your USB hub/motherboard.
I'm using linux-2.6.12-gentoo-r4, I've included gentoo-r4 because I'm not sure (I'v installed gentoo for the first time yesterday) but i think that it has a patch provided by gentoo.
How do I ensue i'm not exceeding the power draw of th mb?
Check your MB specs for the total current permitted on the USB connection(s). Total the current requirements for each of the devices plugged into the USB connection(s), which is specified in the documentation for each device that requires power. If the total exceeds the power available, move some devices to another (independently powered) hub.
While I've found fixes in several distributions for this, it doesn't look like anyone has reported the bug for Gentoo. Perhaps as a user of that distribution you should report it so it gets addressed:
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