[solved] Re: Error message on console at logging in
Rodolfo Medina <rodolfo.medina@gmail.com> writes:
> 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.
>
>
>
> 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.
It seems to be solved appending to the file /etc/init.d/rc.local the following
stuff:
dmesg -n 1
; and, besides, in /etc/sysctl.conf uncommenting the following line:
kernel.printk = 3 4 1 3
Rodolfo
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