https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285867
--- Comment #27 from Anthony Williams <anth...@adfw.co.uk> --- Fortunately the T400 is old enough to have a serial port on the docking station. I've attached serial verbose boot outputs from memstick images of 14.1-RELEASE and 14.2-RELEASE, with SMP enabled and disabled. In both 14.1-R and 14.2-R, booting with ACPI disabled causes an instant panic: > APIC: Could not find any APICs. > panic: running without device atpic requires a local APIC The most significant memory-related difference appears to be (diff the relevant attachments for context): 14.1-RELEASE: 0x0000000002422000 - 0x00000000bd4a0fff, 3137859584 bytes (766079 pages) avail memory = 8167993344 (7789 MB) x86bios: SSEG 0x09c000-0x09cfff at 0xfffffe00103dc000 14.2-RELEASE: 0x0000000002401000 - 0x00000000bd4a0fff, 3137994752 bytes (766112 pages) avail memory = 8168169472 (7789 MB) x86bios: SSEG 0x09c000-0x09cfff at 0xfffffe00103d4000 So 14.2-RELEASE is seeing 0x21000 more bytes / 33 pages in the above memory chunk, and has the SSEG (?) BIOS region mapped(?) 0x8000 bytes lower down. Sorry for any imprecision here, I've not had to look at memory mapping of a PC BIOS much before! Anthony -- You are receiving this mail because: You are the assignee for the bug.
