OK then. This sounds like a regression in vanilla Ubuntu between versions 18.10 and 19.04. Next please try installing some older kernel versions from here:
https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D
then reboot and as soon as the purple screen appears tap Escape. Then navigate through the menus and choose an older kernel version to boot.
We need to find out the last kernel version without the bug, and the first kernel version with the bug.
OK then. This sounds like a regression in vanilla Ubuntu between versions 18.10 and 19.04. Next please try installing some older kernel versions from here:
https:/ /kernel. ubuntu. com/~kernel- ppa/mainline/ ?C=N;O= D
then reboot and as soon as the purple screen appears tap Escape. Then navigate through the menus and choose an older kernel version to boot.
We need to find out the last kernel version without the bug, and the first kernel version with the bug.