This bug was fixed in the package linux-oem-5.14 - 5.14.0-1010.10 --------------- linux-oem-5.14 (5.14.0-1010.10) focal; urgency=medium
* focal/linux-oem-5.14: 5.14.0-1010.10 -proposed tracker (LP: #1953346) * alsa/sdw: add sdw audio machine driver for several ADL machines (LP: #1951563) - ASoC: Intel: sof_sdw: Add support for SKU 0AF3 product - ASoC: Intel: soc-acpi: add SKU 0AF3 SoundWire configuration - ASoC: Intel: sof_sdw: Add support for SKU 0B00 and 0B01 products - ASoC: Intel: sof_sdw: Add support for SKU 0B11 product - ASoC: Intel: sof_sdw: Add support for SKU 0B13 product - ASoC: Intel: soc-acpi: add SKU 0B13 SoundWire configuration - ASoC: Intel: sof_sdw: Add support for SKU 0B29 product - ASoC: Intel: soc-acpi: add SKU 0B29 SoundWire configuration - ASoC: Intel: sof_sdw: Add support for SKU 0B12 product - ASoC: intel: sof_sdw: return the original error number - ASoC: intel: sof_sdw: rename be_index/link_id to link_index - ASoC: intel: sof_sdw: Use a fixed DAI link id for AMP - ASoC: intel: sof_sdw: move DMIC link id overwrite to create_sdw_dailink - ASoC: intel: sof_sdw: remove SOF_RT715_DAI_ID_FIX quirk - ASoC: intel: sof_sdw: remove get_next_be_id - ASoC: intel: sof_sdw: add link adr order check - soundwire: bus: update Slave status in sdw_clear_slave_status -- Chia-Lin Kao (AceLan) <acelan....@canonical.com> Mon, 06 Dec 2021 22:12:32 +0800 ** Changed in: linux-oem-5.14 (Ubuntu Focal) Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.14 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: Invalid Status in linux-oem-5.14 package in Ubuntu: Invalid Status in linux-oem-5.13 source package in Focal: Fix Committed Status in linux-oem-5.14 source package in Focal: Fix Released Status in linux source package in Impish: Confirmed 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. SRU justification: ============== [Impact] The trackpoint cursor often suddenly jumps to an edge/corner, because the hardware/firmware sometimes reports wrong coordinates / loses sync. [Fix] Ignore the buggy data reported by Elan TP firmware, make the TP usable. [Test] Tested on ThinkPad AMD X13 and users confirm on other platforms. [Where problems could occur] It's limited to specific Elan device, it may break the Elan Trackpoint. Jammy already got this commit in Ubuntu-5.15.0-12.12 Phoenix Huang (1): Input: elantench - fix misreporting trackpoint coordinates drivers/input/mouse/elantech.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1936295/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp