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Groups > linux.debian.kernel > #71990 > unrolled thread

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

Started bySalvatore Bonaccorso <carnil@debian.org>
First post2021-05-29 14:10 +0200
Last post2021-05-31 17:00 +0200
Articles 4 — 3 participants

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  Bug#924913: trackpad on L480 unusable after upgrade to testing Salvatore Bonaccorso <carnil@debian.org> - 2021-05-29 14:10 +0200
    Processed: Re: Bug#924913: trackpad on L480 unusable after  upgrade to testing "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-05-29 14:10 +0200
    Bug#924913: trackpad on L480 unusable after upgrade to testing Alois Schlögl <alois.schloegl@ist.ac.at> - 2021-05-31 08:40 +0200
      Bug#924913: trackpad on L480 unusable after upgrade to testing Alois Schlögl <alois.schloegl@ist.ac.at> - 2021-05-31 17:00 +0200

#71990 — Bug#924913: trackpad on L480 unusable after upgrade to testing

FromSalvatore Bonaccorso <carnil@debian.org>
Date2021-05-29 14:10 +0200
SubjectBug#924913: trackpad on L480 unusable after upgrade to testing
Message-ID<Ck5WW-1bG-29@gated-at.bofh.it>
Control: tags -1 + moreinfo

Hi Alois,

On Fri, May 31, 2019 at 09:24:03PM +0200, Romain Perier wrote:
> On Wed, May 29, 2019 at 05:54:22PM +0200, Alois Schlögl wrote:
> > On 3/26/19 9:03 PM, 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
> > 
> > 
> > Dear Romain,
> > 
> > 
> > your instructions to build the kernel worked fine, when trying to
> > install the kernel,
> > 
> >    sudo dpkg -i linux-headers-4.19.0-5-amd64_4.19.37-3a~test_amd64.deb 
> > linux-image-4.19.0-5-amd64-unsigned_4.19.37-3a~test_amd64.deb
> > 
> > I run into problem, getting this warning. 
> > 
> > 
> >  │ You are running a kernel (version 4.19.0-5-amd64) and attempting to
> > remove the same
> > version.                                                                                           
> > │
> >  │                                                                                                                                                                                        
> > │
> >  │ This can make the system unbootable as it will remove
> > /boot/vmlinuz-4.19.0-5-amd64 and all modules under the directory
> > /lib/modules/4.19.0-5-amd64. This can only be fixed with a copy  │
> >  │ of the kernel image and the corresponding
> > modules.                                                                                                                                     
> > │
> >  │                                                                                                                                                                                        
> > │
> >  │ It is highly recommended to abort the kernel removal unless you are
> > prepared to fix the system after
> > removal.                                                                          
> > │
> >  │                                                                                                                                                                                        
> > │
> >  │ Abort kernel removal?   
> > 
> > 
> > I'm not sure if I'm "prepared to fix the system". Can you recommend a
> > reasonable save way to go forward ?
> > 
> > 
> > Cheers,
> > 
> >    Alois
> 
> Hello,
> 
> Well, this is something I have tested here myself, from the linux
> git repository (on salsa.debian.org). I have built a 4.19.37-4a~test
> with the patch , then I have forced the install with the same question
> than you. And he did the trick !
> 
> So what you can do is:
> 
>  - When the dialog interface (the blue one) asks you to abort or continue the install,
>    press "no" to don't abort and continue the install
>  - Once done, you can reboot
>  - Check that the boot is working fine and you're running the intended
>    kernel:  4.19.37-3a~test  (via uname -a)
>  - Check if your problem is fixed
> 
>  - Once you want to re-use the debian kernel, you can :
> 
>    1. $ sudo apt remove linux-image-4.19.0-5-amd64-unsigned linux-headers-4.19.0-5-amd64
> 
>    ==> you will get a conflict , that's normal, you will be adviced to use
>    "apt --fix-broken install", so please use it.
> 
>    2. It should reinstall the official debian kernel package. Then you
>    can reboot to the official kernel image and it should do the trick
> 
> 
> Everything has been tested here from git, the only difference is that I
> built a kernel 4.19.37-4a~test  but the steps should be the same.

is this issue fixed with a recent kernel? As in either unstable,
buster-backports or if you use stable, the newest one from buster?

Regards,
Salvatore

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#72012 — Processed: Re: Bug#924913: trackpad on L480 unusable after upgrade to testing

From"Debian Bug Tracking System" <owner@bugs.debian.org>
Date2021-05-29 14:10 +0200
SubjectProcessed: Re: Bug#924913: trackpad on L480 unusable after upgrade to testing
Message-ID<Ck5WX-1bG-39@gated-at.bofh.it>
In reply to#71990
Processing control commands:

> tags -1 + moreinfo
Bug #924913 [src:linux] trackpad on L480 unusable after upgrade to testing
Added tag(s) moreinfo.

-- 
924913: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=924913
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#72039

FromAlois Schlögl <alois.schloegl@ist.ac.at>
Date2021-05-31 08:40 +0200
Message-ID<CkJKG-7WP-3@gated-at.bofh.it>
In reply to#71990

Am 5/29/21 um 1:59 PM schrieb Salvatore Bonaccorso:
> Control: tags -1 + moreinfo
>
> Hi Alois,
>
> On Fri, May 31, 2019 at 09:24:03PM +0200, Romain Perier wrote:
>> On Wed, May 29, 2019 at 05:54:22PM +0200, Alois Schlögl wrote:
>>> On 3/26/19 9:03 PM, 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
>>>
>>> Dear Romain,
>>>
>>>
>>> your instructions to build the kernel worked fine, when trying to
>>> install the kernel,
>>>
>>>     sudo dpkg -i linux-headers-4.19.0-5-amd64_4.19.37-3a~test_amd64.deb
>>> linux-image-4.19.0-5-amd64-unsigned_4.19.37-3a~test_amd64.deb
>>>
>>> I run into problem, getting this warning.
>>>
>>>
>>>   │ You are running a kernel (version 4.19.0-5-amd64) and attempting to
>>> remove the same
>>> version.
>>> │
>>>   │
>>> │
>>>   │ This can make the system unbootable as it will remove
>>> /boot/vmlinuz-4.19.0-5-amd64 and all modules under the directory
>>> /lib/modules/4.19.0-5-amd64. This can only be fixed with a copy  │
>>>   │ of the kernel image and the corresponding
>>> modules.
>>> │
>>>   │
>>> │
>>>   │ It is highly recommended to abort the kernel removal unless you are
>>> prepared to fix the system after
>>> removal.
>>> │
>>>   │
>>> │
>>>   │ Abort kernel removal?
>>>
>>>
>>> I'm not sure if I'm "prepared to fix the system". Can you recommend a
>>> reasonable save way to go forward ?
>>>
>>>
>>> Cheers,
>>>
>>>     Alois
>> Hello,
>>
>> Well, this is something I have tested here myself, from the linux
>> git repository (on salsa.debian.org). I have built a 4.19.37-4a~test
>> with the patch , then I have forced the install with the same question
>> than you. And he did the trick !
>>
>> So what you can do is:
>>
>>   - When the dialog interface (the blue one) asks you to abort or continue the install,
>>     press "no" to don't abort and continue the install
>>   - Once done, you can reboot
>>   - Check that the boot is working fine and you're running the intended
>>     kernel:  4.19.37-3a~test  (via uname -a)
>>   - Check if your problem is fixed
>>
>>   - Once you want to re-use the debian kernel, you can :
>>
>>     1. $ sudo apt remove linux-image-4.19.0-5-amd64-unsigned linux-headers-4.19.0-5-amd64
>>
>>     ==> you will get a conflict , that's normal, you will be adviced to use
>>     "apt --fix-broken install", so please use it.
>>
>>     2. It should reinstall the official debian kernel package. Then you
>>     can reboot to the official kernel image and it should do the trick
>>
>>
>> Everything has been tested here from git, the only difference is that I
>> built a kernel 4.19.37-4a~test  but the steps should be the same.
> is this issue fixed with a recent kernel? As in either unstable,
> buster-backports or if you use stable, the newest one from buster?
>
> Regards,
> Salvatore

In the current stable version of buster, this is not fixed. I'm running
uname -a
    Linux platon 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) 
x86_64 GNU/Linux

Later this week, I might be able to upgrade Linux to the version from 
buster-backports.


Regards,
    Alois

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#72049

FromAlois Schlögl <alois.schloegl@ist.ac.at>
Date2021-05-31 17:00 +0200
Message-ID<CkRyx-474-3@gated-at.bofh.it>
In reply to#72039

Am 5/31/21 um 8:19 AM schrieb Alois Schlögl:
>
>
> Am 5/29/21 um 1:59 PM schrieb Salvatore Bonaccorso:
>> Control: tags -1 + moreinfo
>>
>> Hi Alois,
>>
>> On Fri, May 31, 2019 at 09:24:03PM +0200, Romain Perier wrote:
>>> On Wed, May 29, 2019 at 05:54:22PM +0200, Alois Schlögl wrote:
>>>> On 3/26/19 9:03 PM, 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
>>>>
>>>> Dear Romain,
>>>>
>>>>
>>>> your instructions to build the kernel worked fine, when trying to
>>>> install the kernel,
>>>>
>>>>     sudo dpkg -i 
>>>> linux-headers-4.19.0-5-amd64_4.19.37-3a~test_amd64.deb
>>>> linux-image-4.19.0-5-amd64-unsigned_4.19.37-3a~test_amd64.deb
>>>>
>>>> I run into problem, getting this warning.
>>>>
>>>>
>>>>   │ You are running a kernel (version 4.19.0-5-amd64) and 
>>>> attempting to
>>>> remove the same
>>>> version.
>>>> │
>>>>   │
>>>> │
>>>>   │ This can make the system unbootable as it will remove
>>>> /boot/vmlinuz-4.19.0-5-amd64 and all modules under the directory
>>>> /lib/modules/4.19.0-5-amd64. This can only be fixed with a copy  │
>>>>   │ of the kernel image and the corresponding
>>>> modules.
>>>> │
>>>>   │
>>>> │
>>>>   │ It is highly recommended to abort the kernel removal unless you 
>>>> are
>>>> prepared to fix the system after
>>>> removal.
>>>> │
>>>>   │
>>>> │
>>>>   │ Abort kernel removal?
>>>>
>>>>
>>>> I'm not sure if I'm "prepared to fix the system". Can you recommend a
>>>> reasonable save way to go forward ?
>>>>
>>>>
>>>> Cheers,
>>>>
>>>>     Alois
>>> Hello,
>>>
>>> Well, this is something I have tested here myself, from the linux
>>> git repository (on salsa.debian.org). I have built a 4.19.37-4a~test
>>> with the patch , then I have forced the install with the same question
>>> than you. And he did the trick !
>>>
>>> So what you can do is:
>>>
>>>   - When the dialog interface (the blue one) asks you to abort or 
>>> continue the install,
>>>     press "no" to don't abort and continue the install
>>>   - Once done, you can reboot
>>>   - Check that the boot is working fine and you're running the intended
>>>     kernel:  4.19.37-3a~test  (via uname -a)
>>>   - Check if your problem is fixed
>>>
>>>   - Once you want to re-use the debian kernel, you can :
>>>
>>>     1. $ sudo apt remove linux-image-4.19.0-5-amd64-unsigned 
>>> linux-headers-4.19.0-5-amd64
>>>
>>>     ==> you will get a conflict , that's normal, you will be adviced 
>>> to use
>>>     "apt --fix-broken install", so please use it.
>>>
>>>     2. It should reinstall the official debian kernel package. Then you
>>>     can reboot to the official kernel image and it should do the trick
>>>
>>>
>>> Everything has been tested here from git, the only difference is that I
>>> built a kernel 4.19.37-4a~test  but the steps should be the same.
>> is this issue fixed with a recent kernel? As in either unstable,
>> buster-backports or if you use stable, the newest one from buster?
>>
>> Regards,
>> Salvatore
>
> In the current stable version of buster, this is not fixed. I'm running
> uname -a
>    Linux platon 4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) 
> x86_64 GNU/Linux
>
> Later this week, I might be able to upgrade Linux to the version from 
> buster-backports.
>
>
> Regards,
>    Alois
>
>


I've upgraded linux with the version from buster-backports
      apt install -t buster-backports linux-image-amd64 linux-headers-amd64
and I can confirm that this issue is now solved. Thanks.
Touchpad and trackpoint are just working after the reboot.

FYI, uname -a reports now
   Linux platon 5.10.0-0.bpo.5-amd64 #1 SMP Debian 5.10.24-1~bpo10+1 
(2021-03-29) x86_64 GNU/Linux


Regards,
    Alois

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