Thank you for taking the time to report this bug and helping to make Ubuntu better.
You mention installing the most recent kernel for Ubuntu 18.04 LTS, which currently is the 5.0 series (ie. a new install using Ubuntu 18.04.2 or 18.04.3 achieves this, or enabling HWE or the hardware-enablement stack on older install media) but I see evidence of the use 4.15 series kernel, not 4.18/5.0 (not the latest, but available for 18.04 without specialized install steps). The use (or evidence of) the later kernels may also help make this bug-report more useful (it looks more like it was filed on a 'live' system).
You can also change this bug-report into a question, to try and get you help, but even support sites may benefit from details of what instructions you followed (to verify they applied to your situation), who "they" are that told you to do steps, plus details of what those steps were.
Currently the description and detail here do not match, so it may be possible that little can be done.
Thank you for taking the time to report this bug and helping to make Ubuntu better.
You mention installing the most recent kernel for Ubuntu 18.04 LTS, which currently is the 5.0 series (ie. a new install using Ubuntu 18.04.2 or 18.04.3 achieves this, or enabling HWE or the hardware-enablement stack on older install media) but I see evidence of the use 4.15 series kernel, not 4.18/5.0 (not the latest, but available for 18.04 without specialized install steps). The use (or evidence of) the later kernels may also help make this bug-report more useful (it looks more like it was filed on a 'live' system).
You may find help with your problem in the support forum of your local Ubuntu community http:// loco.ubuntu. com/ or asking at https:/ /askubuntu. com or https:/ /ubuntuforums. org, or for more support options please look at https:/ /discourse. ubuntu. com/t/community -support/ 709
You can also change this bug-report into a question, to try and get you help, but even support sites may benefit from details of what instructions you followed (to verify they applied to your situation), who "they" are that told you to do steps, plus details of what those steps were.
Currently the description and detail here do not match, so it may be possible that little can be done.