Hi Charles
Obviously the usb ports work good, I think is a bug in the driver or something 
like..
Could be a cable problem, too.
I'll try to change the USB cable but is hard to be fault, it's new..

What version of NUT? We increased the timeout in 2.7.1.
Network UPS Tools - Megatec/Q1 protocol USB driver 0.09 (2.6.5)

Also, devices that talk to blazer_usb are basically serial UPSes with a 
USB-to-serial converter. The increased CPU usage is not surprising, since the 
host now has to poll the USB-to-serial converter (rather than the UART 
interrupting the CPU when data is ready). Do you have any profiling data to 
show how much more CPU time is being used?
I don't have any profiling data, I just noticed that blazer_usb is ever first in 'top' list, with older blazer driver it was at the end of the 'top' list, now it uses always 0,3% to 1,7% of CPU with poolinterval at 2 seconds.

My CPU is not so powerful but anyway it is a good diference and so I noted it..

Bye
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