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Groups > linux.debian.kernel > #63719

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

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On Tue, Mar 26, 2019 at 09:03:59PM +0100, Romain Perier wrote:
> 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

Could you also provide the logs of the non booting kernel ?
If you want I can also build a kernel for you with the fix and then
send you a link via "firefox send" (something secure and free) for example.

Regards,
Romain

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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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