Hi,
erstmal nochmals vielen lieben Dank für euren Support und die Geduld!
Warum keine Neuinstallation? Naja, Zeitersparnis würde ich sagen. Auch wenn man so oder so ein Backup der Daten macht, müssen doch alle Programme wieder neu installiert und ggf. konfiguriert werden.
Habe also die 'unsigned'-Kernels jeweils folgendermaßen deinstalliert (vorher mit Kernel 5.4 gebootet):
sudo dpkg --purge [KERNEL-IMAGE-NAME]
sudo update-grub
Danach dann nach dieser Anweisung auf 20.10 aktualisiert:
https://www.debugpoint.com/2020/10/upgrade-focal-fossa-to-groovy-gorilla/
Nochmal geprüft ob alles sauber ist bzgl. der Kernel:
dpkg -l | egrep 'linux-[g|i|s|h|m]'
ii binutils-x86-64-linux-gnu 2.35.1-1ubuntu1 amd64 GNU binary utilities, for x86-64-linux-gnu target
ii linux-generic 5.8.0.29.34 amd64 Complete Generic Linux kernel and headers
ii linux-headers-5.6.10-050610 5.6.10-050610.202005052301 all Header files related to Linux kernel version 5.6.10
ii linux-headers-5.8.0-29 5.8.0-29.31 all Header files related to Linux kernel version 5.8.0
ii linux-headers-5.8.0-29-generic 5.8.0-29.31 amd64 Linux kernel headers for version 5.8.0 on 64 bit x86 SMP
ii linux-headers-generic 5.8.0.29.34 amd64 Generic Linux kernel headers
rc linux-image-5.0.0-23-generic 5.0.0-23.24~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.0.0-37-generic 5.0.0-37.40~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-26-generic 5.3.0-26.28~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-28-generic 5.3.0-28.30~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-40-generic 5.3.0-40.32~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-42-generic 5.3.0-42.34~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-45-generic 5.3.0-45.37~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-46-generic 5.3.0-46.38~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-51-generic 5.3.0-51.44~18.04.2 amd64 Signed kernel image generic
rc linux-image-5.3.0-53-generic 5.3.0-53.47~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-59-generic 5.3.0-59.53~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-61-generic 5.3.0-61.55~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.3.0-62-generic 5.3.0-62.56~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-42-generic 5.4.0-42.46~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-45-generic 5.4.0-45.49 amd64 Signed kernel image generic
rc linux-image-5.4.0-47-generic 5.4.0-47.51 amd64 Signed kernel image generic
rc linux-image-5.4.0-48-generic 5.4.0-48.52 amd64 Signed kernel image generic
rc linux-image-5.4.0-51-generic 5.4.0-51.56 amd64 Signed kernel image generic
rc linux-image-5.4.0-52-generic 5.4.0-52.57 amd64 Signed kernel image generic
ii linux-image-5.4.0-54-generic 5.4.0-54.60 amd64 Signed kernel image generic
ii linux-image-5.8.0-29-generic 5.8.0-29.31 amd64 Signed kernel image generic
ii linux-image-generic 5.8.0.29.34 amd64 Generic Linux kernel image
rc linux-modules-5.0.0-23-generic 5.0.0-23.24~18.04.1 amd64 Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP
rc linux-modules-5.0.0-37-generic 5.0.0-37.40~18.04.1 amd64 Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-26-generic 5.3.0-26.28~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-28-generic 5.3.0-28.30~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-40-generic 5.3.0-40.32~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-42-generic 5.3.0-42.34~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-45-generic 5.3.0-45.37~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-46-generic 5.3.0-46.38~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-51-generic 5.3.0-51.44~18.04.2 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-53-generic 5.3.0-53.47~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-59-generic 5.3.0-59.53~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-61-generic 5.3.0-61.55~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.3.0-62-generic 5.3.0-62.56~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-42-generic 5.4.0-42.46~18.04.1 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-45-generic 5.4.0-45.49 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-47-generic 5.4.0-47.51 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-48-generic 5.4.0-48.52 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-51-generic 5.4.0-51.56 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-5.4.0-52-generic 5.4.0-52.57 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.4.0-54-generic 5.4.0-54.60 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-5.6.10-050610-generic 5.6.10-050610.202005052301 amd64 Linux kernel extra modules for version 5.6.10 on 64 bit x86 SMP
ii linux-modules-5.8.0-29-generic 5.8.0-29.31 amd64 Linux kernel extra modules for version 5.8.0 on 64 bit x86 SMP
ii linux-modules-5.8.9-050809-generic 5.8.9-050809.202009120936 amd64 Linux kernel extra modules for version 5.8.9 on 64 bit x86 SMP
rc linux-modules-extra-5.0.0-23-generic 5.0.0-23.24~18.04.1 amd64 Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP
rc linux-modules-extra-5.0.0-37-generic 5.0.0-37.40~18.04.1 amd64 Linux kernel extra modules for version 5.0.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-26-generic 5.3.0-26.28~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-28-generic 5.3.0-28.30~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-40-generic 5.3.0-40.32~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-42-generic 5.3.0-42.34~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-45-generic 5.3.0-45.37~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-46-generic 5.3.0-46.38~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-51-generic 5.3.0-51.44~18.04.2 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-53-generic 5.3.0-53.47~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-59-generic 5.3.0-59.53~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-61-generic 5.3.0-61.55~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.3.0-62-generic 5.3.0-62.56~18.04.1 amd64 Linux kernel extra modules for version 5.3.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-42-generic 5.4.0-42.46~18.04.1 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-45-generic 5.4.0-45.49 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-47-generic 5.4.0-47.51 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-48-generic 5.4.0-48.52 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-51-generic 5.4.0-51.56 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
rc linux-modules-extra-5.4.0-52-generic 5.4.0-52.57 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-extra-5.4.0-54-generic 5.4.0-54.60 amd64 Linux kernel extra modules for version 5.4.0 on 64 bit x86 SMP
ii linux-modules-extra-5.8.0-29-generic 5.8.0-29.31 amd64 Linux kernel extra modules for version 5.8.0 on 64 bit x86 SMP
ii linux-sound-base 1.0.25+dfsg-0ubuntu5 all base package for ALSA and OSS sound systems
Einzig der Scannertreiber musste neu eingerichtet werden.
Soweit funktioniert alles prima auch mit Ton und Mikrofon.
Wenn sich das in ein paar Tagen weiterhin bestätigt kann dieser Thread auf gelöst gesetzt werden. ☺
Andernfalls muss ich wohl doch durch die Neuinstallation...