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I run OpenSuSE 42.3 (Linux 4.4.143) on my Asus Vivobook. All works fine on that. I have also installed Kubuntu 18.04 (Linux 4.15.0-30) and Pinguy 18.04 (Linux 4.15.0-20) on the same laptop.
After running the updates on Kubuntu last night the touchpad simply stopped working and is no longer recognised. I ran the updates on Pinguy this morning - and yes, my touchpad again stopped working and is not recognised.
Any ideas on what has caused this and how to put it right?
The fact that dpkg is returning errors is concerning.
Can you please paste the output from the following commands (don't include the long line of equals signs produced by the last command; if inxi isn't installed then please install it):
It can't be a hardware issue. The OP has mentioned that it works with openSUSE (with kernel 4.4.143). A likely kernel regression issue though based on the evidence supplied so far.
sudo apt-get check
Reading package lists... Done
Building dependency tree
Reading state information... Done
dpkg --audit
dpkg -l | grep -v "^ii"
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
rc clamav-base 0.100.1+dfsg-1ubuntu0.18.04.2 all anti-virus utility for Unix - base package
rc clamav-freshclam 0.100.1+dfsg-1ubuntu0.18.04.2 amd64 anti-virus utility for Unix - virus database update utility
rc linux-image-4.15.0-30-generic 4.15.0-30.32 amd64 Signed kernel image generic
rc linux-modules-4.15.0-20-generic 4.15.0-20.21 amd64 Linux kernel extra modules for version 4.15.0 on 64 bit x86 SMP
rc linux-modules-4.15.0-30-generic 4.15.0-30.32 amd64 Linux kernel extra modules for version 4.15.0 on 64 bit x86 SMP
rc linux-modules-extra-4.15.0-20-generic 4.15.0-20.21 amd64 Linux kernel extra modules for version 4.15.0 on 64 bit x86 SMP
rc linux-modules-extra-4.15.0-30-generic 4.15.0-30.32 amd64 Linux kernel extra modules for version 4.15.0 on 64 bit x86 SMP
That all looks good and doesn't indicate any problems. Which still leaves the question as to why dpkg is returning errors.
Can you have a look in /var/log/dpkg.log to see if that indicates which error is being produced? If not, try installing a package manually with the dpkg command on the command line and see what gives. Also, check your disk space in / and /boot to see that you're not running out of space.
I agree, by the way, that the overall problem is probably kernel-related, but it would also be good to resolve this dpkg issue.
I've had a adventure installing KDE Neon and using that as my grub to boot all the OSes. Kubuntu now has a working touchpad - no idea how. Pinguy still doesn't. The dpkg.log file shows a lot of 'half-installed' or 'half-configured' packages. I've been doing an install --reinstall of the various packages but I can't spot which package might be responsible for the lack of touchpad recognition.
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