I experience absolutely the same problem after upgrading to Kubuntu 18.04. I am using Dell Latitude e5570 laptop and everything worked fine on 16.04. Please let me know what info is needed to investigate the problem.
# uname -a
Linux latitude 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
# sudo lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic
I experience absolutely the same problem after upgrading to Kubuntu 18.04. I am using Dell Latitude e5570 laptop and everything worked fine on 16.04. Please let me know what info is needed to investigate the problem.
# uname -a
Linux latitude 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
# sudo lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic