Re: [regression] Bug 216946 - Toshiba satellite click mini l9w-b: touchscreen: no touch events with kernel 6.1.4

[Benjamin Tissoires]

On Tue, Feb 28, 2023 at 12:32 PM Thorsten Leemhuis
<regressions@xxxxxxxxxxxxx> wrote:
>
> On 19.01.23 16:06, Linux kernel regression tracking (Thorsten Leemhuis)
> wrote:
> > Hi, this is your Linux kernel regression tracker.
> >
> > I noticed a regression report in bugzilla.kernel.org. As many (most?)
> > kernel developer don't keep an eye on it, I decided to forward it by
> > mail. Quoting from https://bugzilla.kernel.org/show_bug.cgi?id=216946 :
>
> The reporter recently confirmed in the ticket that the issue still
> happens with 6.2.
>
> There wasn't any reply from any of the input developers here or in
> bugzilla afaics. :-/ Hmmm. Could someone from that camp maybe please
> take a minute and at least briefly look into this as answer something
> like "that might be due to a problem in subsystem 'foo'", "maybe ask bar
> for an option", or "we have no idea what might cause this, this needs to
> be bisected"? That would help a lot.

The working dmesg shows a line with:
hid-generic 0018:0457:10FB.0002: input,hidraw1: I2C HID v1.00 Device
[SIS0817:00 0457:10FB] on i2c-SIS0817:00
and then
hid-multitouch 0018:0457:10FB.0002: input,hidraw1: I2C HID v1.00
Device [SIS0817:00 0457:10FB] on i2c-SIS0817:00

But these 2 lines do not appear on the 6.1.4 logs.

So the device is not properly enumerated by ACPI or I2C. Hans might
have an idea on how to debug/solve that issue.

Also there were no changes between v5.15 and v5.16 in i2c-hid.ko, so
it's unlikely to be an issue there (unless '5.16' means '5.16.x').

Cheers,
Benjamin

>
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> If I did something stupid, please tell me, as explained on that page.
>
> #regzbot poke
> >>  Gé Koerkamp 2023-01-17 20:21:51 UTC
> >>
> >> Created attachment 303619 [details]
> >> Kernel configuration for v6.1.4/ journalctl (dmesg)/ ACPIdump/lsmod
> >>
> >> Overview:
> >> The touchscreen does not react on touch events.
> >> Touchscreen display and touchpad are working.
> >>
> >> Step to reproduce:
> >> Open any UI page
> >> Try to use touch on relevant UI controls (buttons etc.)
> >>
> >> Result:
> >> No reaction on screen touches
> >>
> >> Expected result:
> >> Reaction on touched control, same as when using the touch pad or connected mouse (which do work).
> >>
> >> Build information:
> >> The error happens with kernel version 6.1.4
> >> After rebuilding with different kernel versions, it appears that it first fails with kernel 5.16
> >>
> >> Additional builds:
> >> The click mini l9w-b still works with kernel 5.10.y LTS and 5.15.y LTS.
> >>
> >> Important remark:
> >> Touchscreen still works fine with kernel 6.1.4 using
> >> - an HP x2 detachable 10-p0xx or
> >> - a Lenovo yoga 520-14ikb
> >>
> >> So it could be a hardware dependent issue
> >
> > See the ticket for more details.
> >
> >
> > [TLDR for the rest of this mail: I'm adding this report to the list of
> > tracked Linux kernel regressions; the text you find below is based on a
> > few templates paragraphs you might have encountered already in similar
> > form.]
> >
> > BTW, let me use this mail to also add the report to the list of tracked
> > regressions to ensure it's doesn't fall through the cracks:
> >
> > #regzbot introduced: v5.15..v5.16
> > https://bugzilla.kernel.org/show_bug.cgi?id=216946
> > #regzbot title: hid: touchscreen broken with Toshiba satellite click
> > mini l9w-b
> > #regzbot ignore-activity
> >
> > This isn't a regression? This issue or a fix for it are already
> > discussed somewhere else? It was fixed already? You want to clarify when
> > the regression started to happen? Or point out I got the title or
> > something else totally wrong? Then just reply and tell me -- ideally
> > while also telling regzbot about it, as explained by the page listed in
> > the footer of this mail.
> >
> > Developers: When fixing the issue, remember to add 'Link:' tags pointing
> > to the report (e.g. the buzgzilla ticket and maybe this mail as well, if
> > this thread sees some discussion). See page linked in footer for details.
> >
> > Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> > --
> > Everything you wanna know about Linux kernel regression tracking:
> > https://linux-regtracking.leemhuis.info/about/#tldr
> > If I did something stupid, please tell me, as explained on that page.
>