Problem with on starting page

[dzonii]

Hello to everyone,i have few messages when my ubuntu starts.
ACPI Error.....Namespace Lookup Failure
ACPI Error..Method parse/execution failed
BCL, AE NOT FOUND
dev/sda5 clean

Could anyone knows whats solution to this problem problem,i suspect it something with BIOS,but im not so sure
Any help is appreciated
Thanks.

[Dennis N]

I see the same during startup (see below), plus two more. But only on one older UEFI computer I have. Since they don't affect anything as far as I can tell, I just ignore them. I have seen it suggested that upgrading your firmware may solve this, but I chose not to attempt that. These have been appearing since kernel 4.9 and later.

ACPI Error: [DSSP] Namespace lookup failure, AE_NOT_FOUND (20170531/psargs-364)
ACPI Error: Method parse/execution failed \_SB.PCI0.SAT0.SPT0._GTF, AE_NOT_FOUND (20170531/psparse-550)
Couldn't get size: 0x800000000000000e
MODSIGN: Couldn't get UEFI db list