It always happend on this notebook (since one year on the last 3 Ubuntu releases)
Also on 4.19.0-041900-generic (form http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19 as you suggested) it happens.
But just now I saw that I get following bus fault error when I open the lid after booting:
kernel: [ 31.496669] nouveau 0000:01:00.0: bus: MMIO read of 00000000 FAULT at 619444 [ IBUS ]
(this happend on previous kernels as well)
It always happend on this notebook (since one year on the last 3 Ubuntu releases)
Also on 4.19.0- 041900- generic (form http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v4.19 as you suggested) it happens.
But just now I saw that I get following bus fault error when I open the lid after booting:
kernel: [ 31.496669] nouveau 0000:01:00.0: bus: MMIO read of 00000000 FAULT at 619444 [ IBUS ]
(this happend on previous kernels as well)