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Groups > linux.debian.kernel > #63649

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

Cross-posted to 2 groups.

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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 Romainm


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).


> - 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


>
> Thanks,
> Regards,
> Romain


Thank You, 

   Alois



>> -- System Information:
>> Debian Release: buster/sid
>>   APT prefers testing
>>   APT policy: (990, 'testing'), (500, 'stable')
>> Architecture: amd64 (x86_64)
>>
>> Kernel: Linux 4.19.0-2-amd64 (SMP w/8 CPU cores)
>> Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
>> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
>> LANGUAGE=en_US:en (charmap=UTF-8)
>> Shell: /bin/sh linked to /bin/dash
>> Init: systemd (via /run/systemd/system)
>> LSM: AppArmor: enabled

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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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