[Bug 1757481] Re: Only enable APM on disks that advertise it

[Brian Murray]

Hello dann, or anyone else affected,

Accepted hdparm into artful-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/hdparm/9.51+ds-
1ubuntu0.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-artful to verification-done-artful. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-artful. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: hdparm (Ubuntu Artful)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-artful

** Changed in: hdparm (Ubuntu Xenial)
       Status: In Progress => Fix Committed

** Tags added: verification-needed-xenial

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https://bugs.launchpad.net/bugs/1757481

Title:
  Only enable APM on disks that advertise it

Status in hdparm package in Ubuntu:
  Fix Released
Status in hdparm source package in Xenial:
  Fix Committed
Status in hdparm source package in Artful:
  Fix Committed
Status in hdparm source package in Bionic:
  Fix Released
Status in hdparm package in Debian:
  Fix Released

Bug description:
  [Impact]
  hdparm can cause certain systems to occasionally fail to boot. hdparm tries to enable APM on every (non-USB/non-firewire) disk in the system without first checking if APM is supported. This *should*
  be OK, since hdparm fails gracefully in this case. However, sending APM commands to disks that don't support it can have side-effects. I received a report that this was causing bus resets on a Cavium Sabre system with the disk below that would sometimes escalate to a boot failure.

  [Test Case]
  Boot a system with a non-USB/non-firewire disk that does not support APM and verify that there are no kernel messages like:

  SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 04 53 40 fe 21 04
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   APM_level = not supported

  
  [Regression Risk]
  This change entered Debian and Ubuntu 1 month ago, and no regressions have been reported. One source of regressions might be that configuring APM on a disk that claims not to support it did have some positive side-effect that would no longer occur.

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