Jammy already got this commit in Ubuntu-5.15.0-12.12

It's limited to specific Elan device, it may break the Elan Trackpoint. Tested on ThinkPad AMD X13 and users confirm on other platforms. Ignore the buggy data reported by Elan TP firmware, make the TP usable.

The hardware/firmware sometimes reports wrong coordinates / loses sync. The trackpoint cursor often suddenly jumps to an edge/corner, because see comment 18 by Lenovo employee MarkRHPearson com/t5/ Fedora/ T14s-AMD- Trackpoint- almost- unusable/ m-p/5064952? page=1 Discussion on the bug in the Lenovo forum. The Lenovo Thinkpad T14s and X13 are Ubuntu certified, but apparently this hardware issue has slipped the Ubuntu certification process! https:/ /ubuntu. cgi?id= 295733& action= diff Diff of bugfix org/show_ bug.cgi? id=209167 Bug entry in the Linux Bugzilla *Solution:* Please apply existing kernel patch here. The kernel bugfix discards the wrongly reported packages by the Elantech hardware. However, there is a Linux kernel patch mitigating the firmware bug. Currently, the Trackpoint is barely usable and it's impossible to productively work using it.įor a long while, Elantech has not yet put forward (nor confirmed) a firmware update. The trackpoint cursor often suddenly jumps to an edge/corner, because the hardware/firmware sometimes reports wrong coordinates / loses sync. On Lenovo Thinkpad T14s, X13, A475 (and probably more models) the Elantech Trackpoint firmware is defective.

Thinkpad red button accidental bump