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) -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs 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: In Progress Status in hdparm source package in Artful: In Progress Status in hdparm source package in Bionic: 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 _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : group.of.nepali.translators@lists.launchpad.net Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp