Bug#924913: trackpad on L480 unusable after upgrade to testing

From	Romain Perier <romain.perier@gmail.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#924913: trackpad on L480 unusable after upgrade to testing
Date	2019-03-26 21:10 +0100
Message-ID	<xG0yu-7OI-1@gated-at.bofh.it> (permalink)
References	(4 earlier) <xD5Em-54p-9@gated-at.bofh.it> <xCXQu-jX-3@gated-at.bofh.it> <xDDZn-1PY-5@gated-at.bofh.it> <xCXQu-jX-3@gated-at.bofh.it> <xDDZn-1PY-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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On Wed, Mar 20, 2019 at 08:24:33AM +0100, Alois Schlögl wrote:
> On 3/18/19 7:46 PM, Romain Perier wrote:
> > On Mon, Mar 18, 2019 at 12:43:10PM +0100, Alois Schlögl wrote:
> >> On 3/18/19 12:20 PM, Romain Perier wrote:
> >>> Hello,
> >>>
> >>> On Mon, Mar 18, 2019 at 11:27:41AM +0100, Alois Schlögl wrote:
> >>>> Source: linux
> >>>> Severity: normal
> >>>>
> >>>> Dear Maintainer,
> >>>>
> >>>>    On a Lenovo L480 laptop, I've upgraded Debian from 9 (stretch) to 10
> >>>> (testing).
> >>>>    After the upgrade, the touchpad and the trackpoint was not usable
> >>>> anymore.
> >>>>
> >>>>
> >>>>    This already has some bug report here,
> >>>>    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803600
> >>>>
> >>>>    As a workaround, one can run the command,
> >>>>        sudo sh -c 'echo -n "elantech">
> >>>> /sys/bus/serio/devices/serio1/protocol'
> >>>>    in order to use the touchpad. However, on a GUI Interface and without
> >>>>    an external mouse, it's impossible to apply this workaround
> >>>>   (switching to the terminal <CTRL>-<ALT>F1, login, and run the command
> >>>> above might work)
> >>>>
> >>>>    I expect to be able to use the touchpad just out of the box, not needing
> >>>>    to run the above workaround
> >>>>
> >>> Could you :
> >>>
> >>> - Test with the last kernel uploaded to unstable (4.19.0-4:4.19.28) and confirm or
> >>>   not is the problem still exists ?
> >> Dear Romain
> >>
> >>
> >> I upgraded the kernel and rebooted:
> >>
> >> schloegl@debian10:~$ uname -a
> >> Linux debian10 4.19.0-4-amd64 #1 SMP Debian 4.19.28-2 (2019-03-15)
> >> x86_64 GNU/Linux
> >>
> >>
> >> With this kernel the trackpoint is working, the trackpad is still not
> >> usable.
> >>
> >> (This improves the situation because now at least one pointer device is
> >> available).
> >>
> >>
> > Good, we did some progress :)
> >
> >>> - According to the bug on launchpad and to the fix pushed upstream, the
> >>>   fix seems to be an hardware quirks, could you give me the output of the
> >>>   following command :
> >>>   $ /sys/bus/serio/devices/serio1/firmware_id
> >> root@debian10:~# cat /sys/bus/serio/devices/serio1/firmware_id
> >> PNP: LEN2036 PNP0f13
> >>
> > Could you test the patch attached to this reply ?
> > (if you don't know how to do this, I can provide support)
> >
> > Regards,
> > Romain
> 
> 
> 
> I tried to followed these instructions:
> 
> https://kernel-team.pages.debian.net/kernel-handbook/ch-comm
> 
> 4.5. Building a custom kernel from Debian kernel source
> 
> Specifically using the patched the sources,
> 
> *scripts/config --disable MODULE_SIG*
> **scripts/config --disable DEBUG_INFO**
> ||*|make clean|* ||*|make deb-pkg
> 
> |*
> 
> and ended up with a kernel that does not boot (missing HD audio firmware),
> 
> 
> Which procedure do you recommend to build and install a modified kernel ?
> 
> 

Hi,

Section 4.2 from
https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s-common-official
, until test-patches should work. For the test-patches script, use the flavour and a
featureset as argument, when you invoke it, like this :

# debian/bin/test-patches -f amd64 -s none /path/to/0001-Input-elantech-disable-elan-i2c-for-L480.patch

This will apply the patch on the fly, configure the kernel for amd64
and build a version with a special changelog entry and a special suffix
version dedicated to the test version you generate.


In case of troubles, I can provide another way, from git with few
commands.


Hope this helps,
Regards,
Romain

Thread

Bug#924913: trackpad on L480 unusable after upgrade to testing Alois Schlögl <alois.schloegl@ist.ac.at> - 2019-03-18 11:40 +0100
  Bug#924913: trackpad on L480 unusable after upgrade to testing Romain Perier <romain.perier@gmail.com> - 2019-03-18 12:30 +0100
    Bug#924913: trackpad on L480 unusable after upgrade to testing Alois Schlögl <alois.schloegl@ist.ac.at> - 2019-03-18 13:00 +0100
      Bug#924913: trackpad on L480 unusable after upgrade to testing Romain Perier <romain.perier@gmail.com> - 2019-03-18 20:00 +0100
        Bug#924913: trackpad on L480 unusable after upgrade to testing Alois Schlögl <alois.schloegl@ist.ac.at> - 2019-03-20 08:40 +0100
          Bug#924913: trackpad on L480 unusable after upgrade to testing Romain Perier <romain.perier@gmail.com> - 2019-03-26 21:10 +0100
            Bug#924913: trackpad on L480 unusable after upgrade to testing Romain Perier <romain.perier@gmail.com> - 2019-03-29 17:20 +0100
            Bug#924913: trackpad on L480 unusable after upgrade to testing Alois Schlögl <alois.schloegl@ist.ac.at> - 2019-05-29 18:10 +0200
              Bug#924913: trackpad on L480 unusable after upgrade to testing Romain Perier <romain.perier@gmail.com> - 2019-05-31 21:30 +0200
  Bug#924913: BIOS update helped Damien Miller <djm@djm.net.au> - 2019-07-22 10:10 +0200

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