On Tue, Jun 01, 2021 at 10:16:21AM +0200, Jörg Kastning wrote: > On 01.06.21 08:02, Salvatore Bonaccorso wrote: > > Would you be able to confirm that the patch provided by Oleg, > > referenced solves the issue for you? > > > > https://bugzilla.redhat.com/show_bug.cgi?id=1964036#c1 > > Unfortunately I cannot confirm that. Because the patch doesn't seem to cover > all cases of jumps. Please see the following comment for reference. > > https://bugzilla.redhat.com/show_bug.cgi?id=1964036#c5 > > So I still see jumps when running a patched kernel. Though I'm under > the impression there are fewer jumps than without the patch.
FYI this is the patch that got merged into the kernel maintainer's branch yesterday: https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git/commit/?id=be896bd3b72b44126c55768f14c22a8729b0992e I've been testing it for a couple of hours and it works perfectly in my laptop, no issues at all so far (compared to loss of sync several times per minute without the patch). I'm confused by your impression that there are fewer bugs because the difference is night and day. The patch in the RedHat bugzilla checks the firmware version before discarding the event, the patch in the kernel doesn't, maybe that's the reason? Anyway, I confirm that it works with the kernels in stable-backports (5.14.9-2~bpo11+1), unstable (5.14.16-1) and experimental (5.15.1-1~exp1). This a quite annoying usability problem and affects all users of this device (see e.g [1] and [2]) so I suggest its inclusion in the Debian kernels. [1] https://forums.lenovo.com/t5/Fedora/T14s-AMD-Trackpoint-almost-unusable/m-p/5064952 [2] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1936295 Berto
