[Solved] Mouse constantly dropping events, event processing lagging

rayray · Yesterday 20:41:41

Solved: This is a known issue with certain GPU and mice with AMDGPU. Documented here: https://gitlab.freedesktop.org/drm/amd/-/issues/3709. Should be fixable with patch.

My mouse behaves erratically with no obvious cause. (I first thought it was an issue with mouse acceleration, or something similar. It's hard to explain.) The output of my xorg.log shows that when this issue occurs, events are dropped and event processing is lagging significantly.

My mouse's polling rate is set to 1000Hz.

[  8723.799] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8724.015] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8724.334] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8724.592] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8725.246] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8725.246] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: WARNING: log rate limit exceeded (5 msgs per 30s). Discarding future messages.
[  8757.578] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 31ms, your system is too slow
[  8757.803] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8771.391] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 26ms, your system is too slow
[  8772.152] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 26ms, your system is too slow
[  8794.309] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8794.549] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8795.052] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8795.868] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8796.045] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[  8796.045] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: WARNING: log rate limit exceeded (5 msgs per 30s). Discarding future messages.
[  8796.869] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 24ms, your system is too slow
[  8798.000] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 32ms, your system is too slow
[  8798.000] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: WARNING: log rate limit exceeded (5 msgs per 60min). Discarding future messages.
[ 14974.215] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 14981.614] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 23ms, your system is too slow
[ 14981.829] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 15088.018] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 39ms, your system is too slow
[ 15094.920] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 35ms, your system is too slow
[ 15233.588] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 15235.012] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 32ms, your system is too slow
[ 15235.183] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: client bug: event processing lagging behind by 31ms, your system is too slow
[ 15235.183] (EE) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: WARNING: log rate limit exceeded (5 msgs per 60min). Discarding future messages.
[ 15984.037] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 15984.341] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 15984.649] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 15985.053] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 15985.340] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: SYN_DROPPED event - some input events have been lost.
[ 15985.340] (II) event3  - Corsair CORSAIR SCIMITAR RGB ELITE Gaming Mouse: WARNING: log rate limit exceeded (5 msgs per 30s). Discarding future messages.

I am using XFCE4 with XFWM on X11, my AMDGPU, Mesa and other related drivers are up to date. I have a Ryzen 9 9900X and RX 9070XT. This issue does not occur on Wayland.

I have been told by a friend that it's because "X11 handles rendering and input processing, and that my GPU/xfwm is blocking the X11 thread from processing the mouse event because my monitor refresh rate is 180Hz and my mouse is polling at 1000Hz", which seems silly to me.

This issue occurs randomly, but is very irritating when it does and I cannot determine its exact cause. Disabling TearFree within xrandr and VBLANK / Compositing off in xfwm4 reduces how often it happens.

I'm posting this thread in this section because I have exhausted everything related to the XFCE/XFWM configuration that I could possibly think to alleviate the problem. Anyone else have an issue like this?

EDIT: While trying to capture a video example, I noticed the issue was not present when OBS studio was open. What is going on??

https://www.youtube.com/watch?v=v-qbB1ee6aU

Last edited by rayray (Yesterday 23:12:24)

rayray · Yesterday 21:34:58

Further note- usbhid is set to accept whatever polling rate the mouse is requesting. The mouse is supposed(?) to send 1000Hz (1ms). Will set kernel option to request 1000Hz regardless and see if it solves the issue

[ray@icebox ~]$ systool -m usbhid -A mousepoll
Module = "usbhid"

    mousepoll           = "0"

[ray@icebox ~]$ sudo grep -B3 -A6 "1b1c.*1be3" /sys/kernel/debug/usb/devices

T:  Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#=  2 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1b1c ProdID=1be3 Rev= 1.02
S:  Manufacturer=Corsair
S:  Product=CORSAIR SCIMITAR RGB ELITE Gaming Mouse
S:  SerialNumber=4B82529CC98617598187BDAD573DAF06
C:* #Ifs= 4 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid
E:  Ad=82(I) Atr=03(Int.) MxPS=  64 Ivl=1ms

Arch Linux

#1 Yesterday 20:41:41

[Solved] Mouse constantly dropping events, event processing lagging

#2 Yesterday 21:34:58

Re: [Solved] Mouse constantly dropping events, event processing lagging

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