This bug was fixed in the package hdparm - 9.48+ds-1ubuntu0.1
---------------
hdparm (9.48+ds-1ubuntu0.1) xenial; urgency=medium
* Update d/hdparm-functions: Only enable APM on disks that advertise it.
LP: #1757481.
-- dann frazier <da...@ubuntu.com> Wed, 21 Mar 2018 10:36:13 -0600
** Changed in: hdparm (Ubuntu Xenial)
Status: Fix Committed => Fix Released
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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 Released
Status in hdparm source package in Artful:
Fix Released
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/1757481/+subscriptions
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