On Thu, 09 Jan 2020 16:51:36 +0100 Nicolas Mailhot via devel <devel@lists.fedoraproject.org> 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@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org 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@lists.fedoraproject.org
