Re: Error message on console at logging in
Darac Marjal <mailinglist@darac.org.uk> writes:
> On Mon, Feb 02, 2015 at 10:06:43AM +0000, Rodolfo Medina wrote:
>> Hi all.
>>
>> With Debian 8: on my Acer netbook, when logging in, if I rotate the screen,
>> many undesired lines appear on the console complaining:
>>
>> usb 2-1: device descriptor read/64, error -71
>>
>> . No usb device is inserted in the machine, but the error message disturbs
>> the logging in. With previous Debian versions, such kernel messages were
>> avoided simply appending to /etc/init.d/rc.local the line:
>
> Check lsusb. Some machines have internally connected USB devices. See if
> you have anything connected at Bus 002 Device 001. Error -71 is,
> apparently, a "protocol error", which might suggest that the screen
> rotation is either causing a bit of noise on a cable (is there, for
> example, a USB hub built into your monitor?) or perhaps your monitor is
> trying to communicate the fact that it has rotated over USB and that's
> failing.
>
>>
>> dmesg -n 1
>>
>> , but now this does not help any more. Apparently, the message does not
>> seem to correspond to any effective problem, so I wish I could prevent it to
>> appear.
Here's the output of `lsusb':
Bus 005 Device 012: ID 0c45:62c0 Microdia Sonix USB 2.0 Camera
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Notice that with Debian 6, installed on another partition of the same machine,
the problem does not occur, the message doesn't appear.
Thanks,
Rodolfo
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