With the latest (yesterday's) kernel update (5.0.0-21) for Ubuntu Mate 19.04, I'm getting in dmesg (not at fresh boot or reboot, but after waking from suspend):
unchecked MSR access error: WRMSR to 0x10f (tried to write 0x0000000000000000) at rIP: 0xffffffff90073fc8 (native_write_msr+0x8/0x30)
(I have a HP Laptop 15-da0xxx, if that's useful information.)
Thank you and best regards
Axel