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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Daniel A. Gauthier, regarding the latest mainline kernel, instructions
are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds.

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https://bugs.launchpad.net/bugs/1552551

Title:
  Dell CERC Adapter hangs temporarily until reset.  REGRESSION

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  The HD CERC SATA 1.5 RAID controller (PCI-64 slot) hangs regularly for 10-60 seconds until reset.
  The CERC card firmware is the newest I can find reference to: 4.1-0 [bld 7419].  The Dell Poweredge 1800 has newest BIOS (A07).
  All hardware has been tested thoroughly OK except possibly the APIC component (Serverset Northbridge?).
  The 14.04LTS with all updates (or not) works fine with a perfectly consistent throughput of 77MB/s (slowest HD=66MB/s), RAID5.
  15.10 has the hangs of 10-60 seconds, AND with newest updates as of 26-FEB-2016.
  I have changed PCI interrupts around and moved card slots to minimize sharing and removed cards - repeatedly.
  All hard drives and cables have been thoroughly tested, but the drives are mixed: 1 of 66MB/s, 1 of 125 MB/s, and 3 of 100MB/s.
  The drives not only work perfectly in 14.04LTS, but all Windows versions and DOS/BIOS-INT 19 as well (0x13).
  I have tried all combinations of card RAID options Read ahead, Write cache, and other BIOS options.
  Relevant dmesg lines (these were consecutive):
  [ 1046.808027] aacraid: Host adapter abort request (4,0,0,0)
  [ 1046.808123] aacraid: Host adapter reset request. SCSI hang ?
  [ 1297.828038] aacraid: Host adapter abort request (4,0,0,0)
  [ 1297.828168] aacraid: Host adapter reset request. SCSI hang ?

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-16-generic 4.2.0-16.19
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CasperVersion: 1.365
  CurrentDesktop: Unity
  Date: Thu Mar  3 05:08:57 2016
  LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Dell Computer Corporation PowerEdge 1800
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=u15.10-64/casper/vmlinuz.efi file=u15.10-64/preseed/username.seed boot=casper netboot=nfs nfsroot=10.100.1.86:/data2/tftpboot/u15.10-64 initrd=u15.10-64/casper/initrd.lz ipv6.disable=1 net.ifnames=0
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-16-generic N/A
   linux-backports-modules-4.2.0-16-generic  N/A
   linux-firmware                            1.149
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/29/2006
  dmi.bios.vendor: Dell Computer Corporation
  dmi.bios.version: A07
  dmi.board.name: 0P8611
  dmi.board.vendor: Dell Computer Corporation
  dmi.board.version: A04
  dmi.chassis.type: 17
  dmi.chassis.vendor: Dell Computer Corporation
  dmi.modalias: dmi:bvnDellComputerCorporation:bvrA07:bd09/29/2006:svnDellComputerCorporation:pnPowerEdge1800:pvr:rvnDellComputerCorporation:rn0P8611:rvrA04:cvnDellComputerCorporation:ct17:cvr:
  dmi.product.name: PowerEdge 1800
  dmi.sys.vendor: Dell Computer Corporation

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