The fix is alreay in Jammy 5.15 kernel Ubuntu-5.15.0-12.12 via bug
#1951822.
SRU for 5.13 impish and oem-focal kernel.
** No longer affects: linux (Ubuntu Trusty)
** Also affects: linux-oem-5.13 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.14 (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Focal)
** No longer affects: linux (Ubuntu Jammy)
** No longer affects: linux-oem-5.13 (Ubuntu Impish)
** No longer affects: linux-oem-5.13 (Ubuntu Jammy)
** No longer affects: linux-oem-5.14 (Ubuntu Impish)
** No longer affects: linux-oem-5.14 (Ubuntu Jammy)
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1936295
Title:
Faulty Elantech Trackpoint firmware unusable as it causes sudden
cursor jump to an edge/corner on Lenovo Thinkpad X13, T14s, A475 -->
Apply kernel patch to mitigate the FW bug
Status in linux package in Ubuntu:
Confirmed
Status in linux-oem-5.13 package in Ubuntu:
New
Status in linux-oem-5.14 package in Ubuntu:
New
Status in linux-oem-5.13 source package in Focal:
New
Status in linux-oem-5.14 source package in Focal:
New
Status in linux source package in Impish:
New
Bug description:
*Problem description:*
On Lenovo Thinkpad T14s, X13, A475 (and probably more models) the Elantech
Trackpoint firmware is defective. The trackpoint cursor often suddenly jumps to
an edge/corner, because the hardware/firmware sometimes reports wrong
coordinates / loses sync. Currently, the Trackpoint is barely usable and it's
impossible to productively work using it.
For a long while, Elantech has not yet put forward (nor confirmed) a
firmware update. However, there is a Linux kernel patch mitigating the
firmware bug. The kernel bugfix discards the wrongly reported packages
by the Elantech hardware. This solves the problem for the user.
*Solution:* Please apply existing kernel patch here.
https://bugzilla.kernel.org/show_bug.cgi?id=209167 Bug entry in the Linux
Kernel.org Bugzilla
https://bugzilla.kernel.org/attachment.cgi?id=295733&action=diff Diff of
bugfix
*T14s and X13 are Ubuntu certified:*
The Lenovo Thinkpad T14s and X13 are Ubuntu certified, but apparently this
hardware issue has slipped the Ubuntu certification process!
https://ubuntu.com/certified/202006-27978 and
https://ubuntu.com/certified/202006-27979
*Further information:*
https://forums.lenovo.com/t5/Fedora/T14s-AMD-Trackpoint-almost-unusable/m-p/5064952?page=1
Discussion on the bug in the Lenovo forum. E.g. see comment 18 by Lenovo
employee MarkRHPearson
*My System:*
Lenovo Thinkpad T14s (AMD) 20ujs00k00
Ubuntu 21.04 and 20.04
see entries in kernel.org bugzilla for logs.
To manage notifications about this bug go to:
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