On my ZBook G1 also higher spinning fans with Catalina.My fan in Mojave is very quiet - it spins up at times as I would expected depending on what I am doing. On Catalina it was running much faster and would run up quicker still as I used the system.
I did leave Catalina logged in for 12 hours in case it was converting something in the background. That didn't seem to make any real difference.
Is you battery indicator working as expected? I didn't stay on Catalina too long as the fan was a concern but from what I remember the battery seemed to stay at 100%, which it would not have done on Mojave.
Your guide worked great. I was able to upgrade my machine to Catalina with no new issues. The only issue I am still having is sleep still doesn't work. I worked with Rehabman earlier this year in length and could not get it figured out.I updated my Elitebook 840 G3 using current Rehabman's repo, follow the instruction for System update. Also, use these BT patches on Catalina. The ones from Rehabman's repo don't work on Catalina.
If you'd like, you can check my update process in this simple guide.
I'm not, i use my computer without dock, i think you need a specific .kext.I have that very same model and everything works fine.
It is connected to its dock station but the four USB ports do not work.
Are you in the same situation?
Regards,
Dude, just installed Catalina on mine 8470p. What did u do to fix wifi, bluetooth, brightness and sound?Hp elitebook 8470p With i5, Intel HD 4000 success updated with fresh install
Only the problema with bluetooth and atheros Wi-Fi but now all works
Thanks for the guide and for the help