Comment 0 for bug 1893194

Revision history for this message
You-Sheng Yang (vicamo) wrote : Missing id 8086:a0bc for VMD PCI_DEV_FLAGS_ENABLE_ASPM

One VMD equipped platform has another PCI bridge with PCI ID [8086:a0bc] that is not already in Ubuntu sauced PCI_DEV_FLAGS_ENABLE_ASPM list from bug 1889384. Link Capability Register shows ASPM L1 supported, but has ASPM Disabled in Link Control status.

10000:e0:1c.4 PCI bridge [0604]: Intel Corporation Device [8086:a0bc] (rev 20) (prog-if 00 [Normal decode])
        ...
 Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
  DevCap: MaxPayload 256 bytes, PhantFunc 0
   ExtTag- RBE+
  DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
   RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
   MaxPayload 256 bytes, MaxReadReq 128 bytes
  DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend-
  LnkCap: Port #5, Speed 8GT/s, Width x4, ASPM L1, Exit Latency L1 <16us
   ClockPM- Surprise- LLActRep+ BwNot+ ASPMOptComp+
  LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
   ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
        ...
00: 86 80 bc a0 06 04 10 00 20 00 04 06 00 00 81 00
10: 00 00 00 00 00 00 00 00 00 e1 e1 00 f0 00 00 20
20: 00 72 00 72 f1 ff 01 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 40 00 00 00 00 00 00 00 00 01 02 00
40: 10 80 42 01 01 80 00 00 2f 00 10 00 43 48 72 05
...

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.6.0-1023-oem 5.6.0-1023.23
ProcVersionSignature: Ubuntu 5.6.0-1023.23-oem 5.6.19
Uname: Linux 5.6.0-1023-oem x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Aug 27 04:32:44 2020
DistributionChannelDescriptor:
 # This is the distribution channel descriptor for the OEM CDs
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-focal-amd64-20200502-85+fossa+X31
InstallationDate: Installed on 2020-08-13 (14 days ago)
InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20200502-05:58
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-signed-oem-5.6
UpgradeStatus: No upgrade log present (probably fresh install)