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Re: A mouse and keyboard problem (randomly lose keystrokes)


On Wed, Sep 30, 2015 at 10:05:26AM +0200, Gergely Nagy wrote:
> >>>>> "Alfonso" == Alfonso García <alfon.gz@gmail.com> writes:
>     Alfonso> Hi, I experience a mouse and keyboard strange behavior since debian 7 to 8
>     Alfonso> update. Sometimes, when X windows system started, the USB mouse doesn't work
>     Alfonso> and the USB keyboard loses randomly groups of keystrokes. This not happen
>     Alfonso> ever and sometimes every works fine
>     Alfonso> This happened some of you before?
> I had similar problems. The hardware works fine elsewhere, and on Debian
> 7 too, hardware failure is out of the question. I also had the same
> problem on the TTY, so it's not an X thing either. I also tried about
> half a dozen USB keyboards, no luck.
> In the end, downgrading the kernel to 3.16 fixed the problem for me, and
> have reported #793377 with my findings back then.

I have similar symptoms. Until this I met this thread I thought this is
hardware problem of my notebook Dell Latitude E6520.

My symptoms:

After reboot there is some delay time (several seconds), that when USB
keyboard or mouse is idle longer than this delay it froze.
Next keystroke after this delay is lost, but this lost keystroke wakes
keyboard up and next keystrokes are sent again, until there is another
longer delay. Mouse must be woke-up by pressing button. This woke-up
click is lost, but mouse works, until another delay normally.

Simple disconnect and reconnect both devices fixes this problem till
another reboot.


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