Date: Wed, 25 Apr 2018 08:01:13 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 227759] [acpi] _OSC failed: AE_BUFFER_OVERFLOW on pcib0 (ACPI Host-PCI bridge) Message-ID: <bug-227759-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227759 Bug ID: 227759 Summary: [acpi] _OSC failed: AE_BUFFER_OVERFLOW on pcib0 (ACPI Host-PCI bridge) Product: Base System Version: 11.1-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: jdc@koitsu.org Something I've begun to witness on stable/11 r332847: pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0 pcib0: _OSC failed: AE_BUFFER_OVERFLOW Data points: * System works/functions fine. * This is a bare metal system: Supermicro X7SBA motherboard running latest BIOS. (Yes, the system is "old-ish", but is very stable) * pciconf -lvcb output does not list pcib0, so I cannot get further details= of that device. * I don't know when this problem began. It may have been there for some ti= me.=20 Machine previously ran stable/9 (I moved to stable/11 3-4 months ago; full = OS reinstall). * I believe _OSC comes from ACPI DSDT table, and that this particular attri= bute is *very* important depending on what device (UUID) it's referring to -- bu= t I cannot figure out that UUID. This message is therefore of concern, especia= lly because it doesn't disclose what buffer/integer may have overflowed. I am = not worried about security, I am worried that there is a particular PCI-level feature or aspect that is incorrectly being handled. I will attach several things: * acpidump -dtv 2>&1 output * acpidump -dt output * pciconf -lvcb output (don't think this will help, see above) * dmesg output I am hoping someone has some idea what rXXXXXX commit may have introduced t= his. I can roll the system back to a previous commit for testing, but I cannot simply roll back one commit at a time -- this would take literally weeks. = I do believe there were some recent ACPI changes, however. --=20 You are receiving this mail because: You are the assignee for the bug.=
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