Attached is DSDT dump produced by SSDTTime utility (https://github.com/corpnewt/SSDTTime). I then decompiled the file with "iasl <path_to_DSDT.aml>" command.
It turns out that _SB.PCI0 and _SB.PC00.DGPV are missing. And it worth mentioning that the brightness control hot keys are not functioning (producing no ACPI events and no codes). ** Attachment added: "SSDTTime ACPI dump" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1961429/+attachment/5562330/+files/DSDT.aml -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1961429 Title: ACPI BIOS Error: problem loading UEFI X.509 certificate To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1961429/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
