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The trackpoint and associated mouse buttons recently stopped working on my Lenovo P50 laptop. The recent automatic updates (Ubuntu 20.04.3 LTS, October 2021) played havoc with the trackpad, but that was fixed by re-installing libinput and synapics. Unfortunately, this did not fix the trackpoint and its associated mouse buttons.

I've searched stack exchange, and existing knowledge of this is pretty old (relating to bugs from a few years ago), or relating to different problems (intermittent trackpoint failure or issues with the trackpad, not trackpoint).

Would anyone happen to know if there is a standard way to fix this? Perhaps I missed something.

Edit:

To add to the weirdness, the trackpoint works again after resuming from suspend. However, it will randomly stop working some minutes later.

Edit 2:

Ultimately, this was never resolved. The motherboard of the Lenovo P50 eventually failed, rendering the question irrelevant. That said, here is what I know.

I replaced the P50 with a P51. This is the next iteration, but is parts-compatible with P50 in terms of keyboard, trackpad, trackpoint, and the arrangement of RAM and SSD/HDD slots.

The new machine had the following configuration

Bios version is N1UET80W (1.54)
Bios Date is 2020-11-05
Embedded controller version N1UHT27W (1.10)
ME Firware Version 11.8.80.3746
Machine Type model 20HJS4T300
Sysunit serial PF0Y1SJT
Sysboard serial L1HF83L00D5

The trackpad and trackpoint work with a fresh install of Ubuntu Mate 22.04 LTS. This points weakly to one of the following scenarios:

  • Sporadic trackpad/trackpoint failures are symptomatic of a pre-fail state for the system mainbord.
  • There is a driver issue with the chipsets used in the Lenovo P50, which does not affect those used by the P51. This is somewhat unlikely as the trackpoint uses the same parts, but perhaps some part of the main-board chipset is relevant.
  • There is an issue with the BIOS that might be fixed by updating.
  • There was a driver issue that has since been resolved as of Ubuntu 22.04 LTS.
MRule
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    I don't have any help, but I'm having the same thing happen occasionally with both a T470s and T495s running Debian 11. I get this in kern.log when it happens:

    Jan 10 10:34:01 dragoncable kernel: [109592.227858] psmouse serio2: Mouse at rmi4-00.fn03/serio0/input0 lost synchronization, throwing 2 bytes away. Jan 10 10:34:03 dragoncable kernel: [109594.516833] psmouse serio2: failed to re-enable mouse on rmi4-00.fn03/serio0 Jan 10 10:34:03 dragoncable kernel: [109594.516836] psmouse serio2: resync failed, issuing reconnect request

     – Joshua Boniface Jan 10 '22 at 15:56

2 Answers2

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I have the exact same issue on a Lenovo x1 Tablet running Ubuntu 22.04, even with the after resuming temporary fix. I haven't figured out yet what might be the problem as it happens even on different kernel versions.

Luis Coita Civit
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    Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center. – Community May 10 '22 at 02:59
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    This does not really answer the question. If you have a different question, you can ask it by clicking Ask Question. To get notified when this question gets new answers, you can follow this question. Once you have enough reputation, you can also add a bounty to draw more attention to this question. - From Review – Pilot6 May 10 '22 at 09:46
  • StackExchange rules say this "answer" should actually be a comment on the original question, but ... no harm done, really. – MRule Jul 26 '22 at 08:53
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It may be a Synaptics trackpad driver. I downloaded the latest driver from https://pcsupport.lenovo.com/us/en/ - I also installed wine and when the mouse stopped working, I used wine to execute the *.exe file. I then unplugged my mouse and plugged it back in. It worked for me.

Bruce Barnett
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