On 27.08.2018 19:22, Jaak Ristioja wrote: > Upgrading Linux from 4.16 to 4.17, a ThinkPad L570 started receiving > spurious input events, mostly right mouse button click events, but also > cursor jumps. > > I have not attempted to understand whether these events come from the > trackpoint or touchpad or some other driver, but I managed to bisect > this issue to commit a986c75a7df0 titled "platform/x86: thinkpad_acpi: > Add 2nd Fan Support for Thinkpad P50" by Alexander Kappner. > > Apparently the quirk mitigation is applied when the BIOS version begins > with N1. The BIOS version on the L570 in question is N1XET57W (1.35 ) > which is probably why this commit causes the described problems on the > ThinkPad L570. How exactly? - I don't know. > > The issue did not reproduce when running some stable 4.17 and 4.18 > kernels with commit a986c75a7df0 reverted. > > Please fix this for future kernels. Thanks! :) Ping. Do you need any additional information? Best regards, Jaak Ristioja
