kernel-packages team mailing list archive

[Roderick Smith <rod.smith@xxxxxxxxxxxxx>]

Update: I've verified this bug in a BIOS-mode boot in trusty, with a
twist: BOTH the mei AND the mei_me modules must be blacklisted in order
to cause a reboot to work. When both are blacklisted, rebooting also
works when the system is booted in EFI mode -- I suspect a failure to
blacklist mei_me caused the EFI-mode reboot failures noted in my
previous report.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1154749

Title:
  reboot does a shutdown instead of rebooting (OCP v2)

Status in OEM Priority Project:
  Invalid
Status in Open Compute Project:
  New
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  On the OCP v2 compliant system (Windmill OCP motherboard v2), the
  system hang at the reboot startup. This issue happens on 12.04.1,
  12.04.2 and 12.10.

  The work around in http://ubuntuforums.org/showthread.php?t=2024096,
  blacklisting mei, works. Note the first reboot doesn't work, but the
  subsequent reboots work.

  mei in 12.04.1
  $ modinfo mei
  filename:       /lib/modules/3.2.0-38-generic/kernel/drivers/staging/mei/mei.ko
  version:        7.1.20.1
  license:        GPL v2
  description:    Intel(R) Management Engine Interface
  author:         Intel Corporation
  srcversion:     9252880194B02634B5F0427

  Kernel mei message before blacklisted:
  kernel: [    6.961623] mei: module is from the staging directory, the quality is unknown, you have been warned.
  kernel: [    6.962226] mei 0000:00:16.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
  kernel: [    6.962235] mei 0000:00:16.0: setting latency timer to 64
  kernel: [    6.962310] mei 0000:00:16.0: irq 104 for MSI/MSI-X

  mei in 12.04.2
  $ modinfo mei
  filename:       /lib/modules/3.5.0-25-generic/kernel/drivers/misc/mei/mei.ko
  license:        GPL v2
  description:    Intel(R) Management Engine Interface
  author:         Intel Corporation
  srcversion:     0580619CB5DEF6AB7228EBE

  Kernel mei message before blacklisted:
  kernel: [    6.543470] mei 0000:00:16.0: setting latency timer to 64
  kernel: [    6.543547] mei 0000:00:16.0: irq 104 for MSI/MSI-X
  kernel: [    6.547516] mei 0000:00:16.0: wd: failed to find the client

  mei in 12.10
  $ modinfo mei
  filename:       /lib/modules/3.5.0-21-generic/kernel/drivers/misc/mei/mei.ko
  license:        GPL v2
  description:    Intel(R) Management Engine Interface
  author:         Intel Corporation
  srcversion:     0580619CB5DEF6AB7228EBE

  Kernel mei message before blacklisted:
  kernel: [    4.731997] mei 0000:00:16.0: setting latency timer to 64
  kernel: [    4.736801] mei 0000:00:16.0: irq 104 for MSI/MSI-X
  kernel: [    4.741695] mei 0000:00:16.0: wd: failed to find the client

To manage notifications about this bug go to:
https://bugs.launchpad.net/oem-priority/+bug/1154749/+subscriptions