Public bug reported:
[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.
** Affects: hdparm (Ubuntu)
Importance: Undecided
Status: Fix Released
** Affects: hdparm (Ubuntu Xenial)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Affects: hdparm (Ubuntu Artful)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Affects: hdparm (Ubuntu Bionic)
Importance: Undecided
Status: Fix Released
** Also affects: hdparm (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: hdparm (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: hdparm (Ubuntu Artful)
Importance: Undecided
Status: New
** Changed in: hdparm (Ubuntu Bionic)
Status: New => Fix Released
** Changed in: hdparm (Ubuntu Artful)
Status: New => In Progress
** Changed in: hdparm (Ubuntu Xenial)
Status: New => In Progress
** Changed in: hdparm (Ubuntu Xenial)
Assignee: (unassigned) => dann frazier (dannf)
** Changed in: hdparm (Ubuntu Artful)
Assignee: (unassigned) => dann frazier (dannf)
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https://bugs.launchpad.net/bugs/1757481
Title:
Only enable APM on disks that advertise it
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