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#1 2019-08-11 18:11:12

markand
Member
Registered: 2015-04-09
Posts: 21

Laggish keyboard sometimes

Hello there,

I've received a new machine, a lenovo thinkcentre m920 tiny which I installed Arch Linux as usual. I have a Microsoft All-In-One media keyboard that includes a touchpad on the right. This keyboard usually works fine on every machine I've used on them.

However, on this new machine I sometimes expect terribly laggish mouse movements on GNOME and sometime I also lose keypresses. It also happens in the TTY. I've tried to disable autosuspend by booting with usbcore.autosuspend=-1 with no luck. So I have no idea what could be wrong there.

Just for the sake of testing, I'll build a custom kernel and disable every autosuspend things I can see in the USB stuff and see if it helps.

Any of you already had a similar issue?

Regards

Last edited by markand (2019-08-11 19:24:17)

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#2 2019-08-11 20:06:55

seth
Member
Registered: 2012-09-03
Posts: 13,062

Re: Laggish keyboard sometimes

Is this gnome on wayland? Do you also experience this with gnome on xorg?
(Make sure to also change GDM to avoid noise from there, https://wiki.archlinux.org/index.php/GD … rg_backend )

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#3 2019-08-12 07:13:04

markand
Member
Registered: 2015-04-09
Posts: 21

Re: Laggish keyboard sometimes

Yes it's on Wayland. I'll try with X.Org enabled GDM and an X.Org GNOME session.

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#4 2019-08-13 05:46:14

markand
Member
Registered: 2015-04-09
Posts: 21

Re: Laggish keyboard sometimes

Unfortunately that did not help.

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#5 2019-08-13 05:48:40

seth
Member
Registered: 2012-09-03
Posts: 13,062

Re: Laggish keyboard sometimes

Do you have a (corded) replacement keyboard to test?

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#6 2019-08-13 10:45:27

Ropid
Member
Registered: 2015-03-09
Posts: 612

Re: Laggish keyboard sometimes

Isn't it more likely that this is the PC causing the problem and being slow, and not the connection to the mouse and keyboard?

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#7 2019-08-13 12:36:31

seth
Member
Registered: 2012-09-03
Posts: 13,062

Re: Laggish keyboard sometimes

No.

It also happens in the TTY.

However you could oc. inspect the system load, but my money is on the BT stack.
We can btw. rule that out if the same thing happens with a $5 corded keyboard …

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#8 2019-08-13 20:11:58

seth
Member
Registered: 2012-09-03
Posts: 13,062

Re: Laggish keyboard sometimes

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#9 2019-08-15 07:48:15

markand
Member
Registered: 2015-04-09
Posts: 21

Re: Laggish keyboard sometimes

Hi,

Thanks for all replies. Please note that the Microsoft All-In-One keyboard is not using bluetooth, it has a simple dongle with it.

1. I've tried with another keyboard mouse combo, a logitech one also wireless. It produce the same laggish behavior.
2. I've tried a simple corded keyboard, no problems so far.

So a more naive question, is there any chance the internal bluetooth/wireless combo is causing interferences with those USB dongles? I have no longer ideas to understand what's wrong there so I ask whatever goes into my head smile

Last edited by markand (2019-08-15 07:49:18)

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#10 2019-08-15 14:19:34

seth
Member
Registered: 2012-09-03
Posts: 13,062

Re: Laggish keyboard sometimes

Yup. Most radio operates in the public 2.4GHz range - except for 5GHz wifi (of course)
rfkill your radio and see whether the dongle behaves better. Choosing a different USB slot (if available) or an external hub (ie. get distance from the thinkcenters wifi) might help.

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