On Sun, Jan 12, 2020 at 4:49 PM Hans Ulrich Niedermann <hun@xxxxxxxxxxxxxxxx> wrote:
On Thu, 09 Jan 2020 16:51:36 +0100
Nicolas Mailhot via devel <devel@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Le 2020-01-09 15:02, Stephen John Smoogen a écrit :
>
> > I have seen something like this happen in the past. I think it was
> > around Fedora 18? kernel time frame.. on certain Lenovo T440? if you
> > did a dd to a usb key, keyboard and mouse would be like you pointed
> > out.
>
> I get this all the time, with or without swap, with or without heavy
> copying. The kernel does not seem to understand the difference
> between latency-sensitive usb input and throughput-sensitive non
> input usb traffic.
I have been noticing occasional occurences of the "key released" event
after a "key pressed" event not reaching the keypress repeat code in
time, so that a normal typing sssssuddenllly contains sommme repeated
letters which I have actually typed in a normal time sequence for
single letters.
The one thing which I have noticed which appears to be statistically
related to that issue is whether I am running in a "GNOME" session or
a "GNOME on Xorg" session. The first time I have observed this was when
I tried "GNOME" (without Xorg) for the first time, and when I from time
to time tried "GNOME" (without Xorg) instead of my usual "GNOME on
Xorg" session, that behaviour occured again.
In Fedora 31, the "GNOME" (non-Xorg) session delays the "key released"
events significantly less often than it did a year or two ago, but it
still happens occasionally.
I would not link this issue to some kernel version. From my POV, a
"GNOME" (on Wayland without Xorg) session appears to use the rest of
the software stack in a different way than a "GNOME on Xorg" (on
Wayland) session, but where in that software stack I could look for the
issue, I have no idea whatsoever.
_______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
