Le 22/01/2016 13:11, eric2.vale...@orange.com a écrit :
On 01/20/2016 03:07 PM, Ludovic Rousseau wrote:

It does not look like the problem is the Broadcom reader.

Can you generate a log as documented in 
https://pcsclite.alioth.debian.org/pcsclite.html#support ?
Start the log and then connect your problematic mass-storage USB key.

Thanks


Here is the requested log file. Note that I'm not sure the trace will help:
     1) As soon as I launch it, I have continuous traces but process does not 
even appaers in the top first twenty line,

You have 1 (or 2) application that is continuously (every 200 ms) asking PC/SC 
for card status. That is a very bad PC/SC behaviour.
You should try to identify the bogus application and fix it.

     2) As soon as I plug the USB key, it reaches 100% CPU and top first place 
but do not show anything diffrent in the log.

will try a strace...

[pid 18790] poll([{fd=6, events=POLLIN}, {fd=5, events=POLLIN}], 2, -1) = 1 
([{fd=5, revents=POLLIN}])
[pid 18790] recvmsg(11, 0x7ff128ae9dd0, 0) = -1 EAGAIN (Resource temporarily 
unavailable)
[pid 18790] poll([{fd=6, events=POLLIN}, {fd=5, events=POLLIN}], 2, -1) = 1 
([{fd=5, revents=POLLIN}])
[pid 18790] recvmsg(11, 0x7ff128ae9dd0, 0) = -1 EAGAIN (Resource temporarily 
unavailable)
[pid 18790] poll([{fd=6, events=POLLIN}, {fd=5, events=POLLIN}], 2, -1) = 1 
([{fd=5, revents=POLLIN}])
[pid 18790] recvmsg(11, 0x7ff128ae9dd0, 0) = -1 EAGAIN (Resource temporarily 
unavailable)
[pid 18790] poll([{fd=6, events=POLLIN}, {fd=5, events=POLLIN}], 2, -1) = 1 
([{fd=5, revents=POLLIN}])
[pid 18790] recvmsg(11, 0x7ff128ae9dd0, 0) = -1 EAGAIN (Resource temporarily 
unavailable)

Maybe a problem in libusb.

Do you have kernel errors in dmesg output?

What is the output of "lsusb -v" with the USB key plugged in?

Bye

--
 Dr. Ludovic Rousseau

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