Re: Lenovo T16 Gen 3 touchpad/trackpoint problem (7.9/amd64)

Hi, Ulf,

You wrote:
> The wsmouse output looks quite normal, which should confirm that
> X and/or the window manager cause the cursor jumps.

Ok, that makes sense.

> I assume you have
> checked with 'xinput test ...' - in any setup that produces these jumps -
> that there are no additional events in /dev/wsmouse1 or /dev/wsmouse ???

I'm sorry, I'm not clear on how to use 'xinput test ...' here.  And,
precisely what do you mean by "additional events"?

But I did find something else which might be of interest:

If I restart the X server with no /etc/X11/xorg.conf present, then
the cursor *always* jumps with *every* touchpad movement.  But what
is interesting is:
* If I make a horizontal touchpad movement, the cursor always jumps in
  *x only* (it jumps to the left screen edge, preserving the y coordinate).
  This is true even though my "horizontal" touchpad movement surely isn't
  actually precisely horizontal (even when quantized to the touchpad's
  resolution).
* If I make a vertical touchpad movement, the cursor always jumps in
  *y only* (it jumps to the top screen edge, preserving the x coordinate).
  This is true even though my "vertical" touchpad movement surely isn't
  actually precisely vertical (even when quantized to the touchpad's
  resolution).

Here is the /var/log/messages output for wsmouse debugging when I made
first 3 horizontal touchpad movements, then 3 vertical touchpad movements:

--- begin /var/log/messages excerpt ---
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1342] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1372] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1392] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1392] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1422] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1442] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1452] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1482] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1502] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1512] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1532] 6:1 18:0
Aug 14 01:01:41 nickel /bsd: [wsmouse0-ev][1562] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3122] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3122] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3132] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3142] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3152] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3152] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3162] 6:3 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3172] 6:5 7:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3172] 6:6 7:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3182] 6:6 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3192] 6:9 7:2 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3192] 6:9 7:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3202] 6:8 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3212] 6:9 7:2 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3222] 6:9 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3222] 6:8 7:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3232] 6:8 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3242] 6:8 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3242] 6:7 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3252] 6:6 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3262] 6:7 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3262] 6:5 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3272] 6:6 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3282] 6:5 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3292] 6:4 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3292] 6:3 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3302] 6:4 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3312] 6:3 7:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3322] 6:4 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3332] 6:2 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3332] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3362] 6:1 18:0
Aug 14 01:01:43 nickel /bsd: [wsmouse0-ev][3362] 7:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4432] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4462] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4482] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4482] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4502] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4502] 7:-1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4512] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4522] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4532] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4552] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4552] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4572] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4572] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4582] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4592] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4602] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4602] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4612] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4622] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4622] 6:2 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4632] 6:2 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4642] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4642] 6:2 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4662] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4672] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4672] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4682] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4692] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4712] 6:2 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4722] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4732] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4742] 6:1 18:0
Aug 14 01:01:44 nickel /bsd: [wsmouse0-ev][4762] 6:1 18:0
Aug 14 01:01:46 nickel /bsd: [wsmouse0-ev][6932] 6:1 7:-1 18:0
Aug 14 01:01:46 nickel /bsd: [wsmouse0-ev][6952] 7:-1 18:0
Aug 14 01:01:46 nickel /bsd: [wsmouse0-ev][6962] 6:1 7:-1 18:0
Aug 14 01:01:46 nickel /bsd: [wsmouse0-ev][6982] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][6992] 7:-2 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7002] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7022] 7:-2 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7032] 6:1 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7042] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7052] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7052] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7062] 7:-2 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7072] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7072] 7:-2 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7082] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7092] 7:-2 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7102] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7102] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7112] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7122] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7132] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7142] 7:-1 18:0
Aug 14 01:01:47 nickel /bsd: [wsmouse0-ev][7172] 7:-1 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8052] 6:1 7:-1 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8062] 6:1 7:-2 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8082] 7:-1 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8082] 7:-2 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8092] 6:1 7:-1 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8102] 7:-3 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8102] 7:-5 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8112] 6:1 7:-4 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8122] 6:1 7:-4 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8132] 7:-5 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8132] 7:-5 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8142] 6:1 7:-5 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8152] 7:-6 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8152] 7:-6 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8162] 6:1 7:-5 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8172] 6:1 7:-5 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8172] 7:-6 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8182] 6:1 7:-8 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8192] 6:2 7:-4 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8202] 6:1 7:-7 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8202] 6:2 7:-7 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8212] 6:1 7:-7 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8222] 6:2 7:-6 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8222] 6:1 7:-6 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8232] 6:2 7:-6 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8242] 6:2 7:-6 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8242] 6:1 7:-5 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8252] 6:1 7:-3 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8262] 7:-2 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8272] 6:1 7:-1 18:0
Aug 14 01:01:48 nickel /bsd: [wsmouse0-ev][8272] 7:-2 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9252] 7:-1 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9262] 7:-2 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9272] 7:-1 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9272] 7:-3 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9282] 7:-5 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9292] 7:-7 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9302] 6:1 7:-10 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9302] 6:1 7:-11 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9312] 6:1 7:-10 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9322] 6:1 7:-12 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9322] 6:1 7:-11 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9332] 6:1 7:-12 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9342] 6:2 7:-11 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9342] 6:1 7:-10 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9352] 6:1 7:-10 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9362] 6:1 7:-9 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9372] 6:1 7:-9 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9372] 6:2 7:-7 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9382] 6:1 7:-5 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9392] 7:-5 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9392] 6:1 7:-4 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9402] 6:1 7:-3 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9412] 7:-1 18:0
Aug 14 01:01:49 nickel /bsd: [wsmouse0-ev][9412] 7:-2 18:0
--- end /var/log/messages excerpt ---

Does this suggest anything interesting to you?

ciao,
-- 
-- "Jonathan Thornburg [remove -color to reply]" <[email protected]>
   he/him; on the west coast of Canada; https://www.bkis-orchard.net/
   "Now back when I worked in banking, if someone went to Barclays,
    pretended to be me, borrowed UKP10,000 and legged it, that was
    `impersonation', and it was the bank's money that had been stolen,
    not my identity.  How did things change?" -- Ross Anderson