This post on the forum seemed to solve a similar issue. <https://forum.linuxcnc.org/38-general-linuxcnc-questions/38929-linuxcnc-2-9-jogging-velocity-fluctuations?start=10#165711>
> On 8 Jul 2020, at 8:21 am, Gene Heskett <ghesk...@shentel.net> wrote: > > On Tuesday 07 July 2020 17:25:21 andy pugh wrote: > >> On Tue, 7 Jul 2020 at 22:14, N <nicklas.karlsso...@gmail.com> wrote: >>> I do not consider it a big problem and will probably connect other >>> jogging method once machine is up and running but as it worked in >>> old version it would of course be good to get it perfect again. >> >> https://github.com/LinuxCNC/linuxcnc/commit/29f52a6e2be42f7785e965a700 >> 2eaecf33f0b7aa#diff-5368256524ea7313310fa9c396bbbcf2 >> >> Might have made a problem with a bouncy keyboard more obvious? >> >> Try reverting to e09ae64fb0a76355b4f559e28c91a29fb25af8ce and seeing >> if the behaviour changes. >> >> Is sounds like an easy problem to find, so a git bisect will probably >> work well (if i am allowed to mention git on the Users list) > > I'm moderately convinced the OP has flaky hdwe. I have only observed this > back when I was driving the sheldon with a pi3, and blamed the > occasional stutter on a traffic jam in the internal usb-2 hub since all > of that on the pi3 goes thru one internal hub. Running the exact same > kernel on a pi4, I have not observed a stutter, ever. On the pi3 it was > keyboard arrow keys only, mdi moves, or running program code, zero > stutters as that spi path doesn't go thru the usb. With the pi4, and > its usb-3, its gone. > > I've not noted it on either of the D-525-MW mobo's, nor on an elderly > Dell that runs the GO704, but I believe all 3 of those have more than > one internal usb-2 hub. > > A good look at dmesg after a reboot would allow the number of hubs to be > discovered, and might be educational. I use (mostly logitek) wireless > keyboards and mice on everything. And I'm surprised I don't have > problems with the Dell, as my portable house phones will not work > understandably within 10 feet of that Dell, its one old noisy piece of > junk, but it runs the mill just fine. > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene > <http://geneslinuxbox.net:6309/gene>> > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net <mailto:Emc-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/emc-users > <https://lists.sourceforge.net/lists/listinfo/emc-users> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
