On Sat, 13 Oct 2018, Jaak Ristioja wrote:
> 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?
It looks like it is failing to detect N1X and N1 as different models,
the bug is likely on this commit:
commit 846a416b4630fc960c10500b4194ad504bc22d4b
platform/x86: thinkpad_acpi: Proper model/release matching
Real life has been **extremely** busy, so I'd appreciate a patch.
Otherwise I will eventually get to it, but it might take a few
weeks(!!).
--
Henrique Holschuh
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