The solution consisted to set the parameter CONFIG_PHY_ROCKCHIP_SAMSUNG_DCPHY=m.
This eliminates the compilation error, as it makes that code a Module.
I created a new user and it works fine with it.
Then I inpected the user not working and noticed:
- the .config/chromium is a link to /run/user/1000/tony-chromium
- df command is showing:
tmpfs 787428 20416 767012 3% /run/user/1000
overlaid 787428 20416 767012 3% /run/user/1000/chromium-chromium
What is this /run/user/1000 ? It seems to be a temporary directory, thus a good reason what I seem to loose cookies.
Of course for the user working there is no such link for .config/chromium
Waiting forward for some light on this setup that was not made by me!
I removed the link .config/chromium rerun chromium, and no issue anymore.