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Groups > linux.debian.kernel > #63660

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

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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 ?


Regards,

  Alois

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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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