Longtime reader of this forum (10+ years), but infrequent poster. I have a Thinkpad x220 with problems with the Trackpoint (red mouse controller in center of keyboard), as well as associated three mouse buttons under the keyboard's space bar. The Trackpad (along with its integrated buttons) works fine. I believe this is a hardware issue, but I'll explain further...
(1) It's intermittent in terms of working / non-working, but it only changes from working to non-working, or back again, after either system reboot, or system recovery from hardware suspend (S3 state). So, that suggests to me some form of initialization going wrong.
(2) When it initially stopped working, no O/S settings nor BIOS settings had been changed. It just stopped working (though since has worked, and not worked).
(3) It exhibits same intermittent wokring / non-working problem in both Linux (typical O/S on laptop) as well as with Win10 (occasional laptop usage).
(4) On even rarer times, it's worked "incorrectly", rather than not at all. In such times, the sideways function of the trackpoint works correctly, but the up/down directions are reversed. In other words, pushing trackpoint up, makes cursor move down; pushing trackpoint down, makes cursor move up. Weird! At the same time that this is happening, the trackpad works completely correctly.
My immediate thought was that this was a hardware issue, and I ordered a replacement keyboard / trackpad module (genuine new lenovo FRU). However, the problem has persisted, and I've already tried two replacement boards. This makes me wonder if there's not an underlying hardware issue on the main system board, but that would be a real shame given the cost and hassle involved of replacement.
I've searched all over online for more info on this but haven't seen any other descriptions of it.
Any suggestions from the Thinkpads.com community would be great help!
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trackpad and trackpoint are usb interfaces and might be conflicting with another software item or hardware add on non-thinkpad items?
Thanks for the suggestion. However, I can't understand how that potential diagnosis would match two of the symptoms:
(1) It started all of a sudden after years of successful use, without any other change of hardware or O/S. If the O/S were just Windows, maybe windows did some behind the scenes update which caused the problem. But, Linux (at least my distro) doesn't do updates without user intervention, so that doesn't seem to fit.
(2) The issue is intermittent, in that it sometimes works perfectly after reboot, and other times it doesn't work at all.
Could you please explain how your recommendation fits with these symptoms? If there really is a USB conflict, shouldn't I see that conflict either ALL of the time, or none of the time? I really appreciate the input, just don't understand how they fit my situation.
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Backup: X601 Core 2 Duo T8100
Toy: X60F Core Solo U1300
On loan: X220 4291-P79 i5-2520M
In pieces: two retired but working X61Ts
RIP: 760XD 9546-U9E; X61 7676-A24; and a BOE-Hydis HV121P01-100 in failed SXGA+ mod
A BIG thank you to axur-delmeria --- I've been trying to solve this for the better part of half a year!
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