Dear Maintainers,
Here is some more information about bug report 1071258 affecting my
Lenovo L570.
1) The bug was first reported as 1071236. It was closed by the
maintainer, who suggested it was possibly due to a hardware failure.
Attempted resolution:
Booting the machine (with the Debian 12 installation) with the linux
image from the previous (Debian 11) installation (which I had not
removed). In other words: booting with linux-image-5.10.0-29-amd64
instead of linux-image-6.1.0-21-amd64.
Result:
The system works normally. The erratic behaviour of keyboard, trackpad,
and external mouse does NOT occur.
2) A commentator suggested that the bug might be related to a similar
problem documented in:
https://bugzilla.kernel.org/show_bug.cgi?id=217718 for AMD CPUs.
Attempted resolution:
From command lscpu, the CPU of the machine is
Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
and therefore the solution suggested in the link above is not applicable.
3) I considered the possibility that the installation of the new linux
image during the upgrade from Debian 11 to Debian 12 had been faulty.
Attempted resolution:
Re-installing linux-image-6.1.0-21-amd64 via Synaptic.
Result:
The problem does not disappear.
4) Determining whether the bug was introduced by the passage from kernel
5.10.0 to 6.1.0, or whether it was an error introduced between releases
of image 6.1.0-*.
Attempted resolution:
I looked at the image versions available in Synaptic, installed the
oldest one available: linux-image-6.1.0-11-amd64, and restarted the system.
Result:
The problem occurs again. I did not try installing other images between
6.1.10-11 and 6.1.10-21.
At this stage, I must leave it to you to investigate and suggest further
operations that may help diagnose the problem and ferret out the bug. I
look forward to receiving suggestions as to which tests, log extracts,
boot parameters, I would have to look into. Please be advised that in
the coming four weeks I will not have access to the troublesome machine
because of travel -- and I will therefore be unable to provide feedback.
With many thanks in advance for your help
Eduardo Casais
