This bug was fixed in the package linux-oem - 4.15.0-1012.15
---------------
linux-oem (4.15.0-1012.15) bionic; urgency=medium
* linux-oem: 4.15.0-1012.15 -proposed tracker (LP: #1782181)
* Miscellaneous Ubuntu changes
- Rebase to 4.15.0-29.31
[ Ubuntu: 4.15.0-29.31 ]
* linux: 4.15.0-29.31 -proposed tracker (LP: #1782173)
* [SRU Bionic][Cosmic] kernel panic in ipmi_ssif at msg_done_handler
(LP: #1777716)
- ipmi_ssif: Fix kernel panic at msg_done_handler
* Update to ocxl driver for 18.04.1 (LP: #1775786)
- misc: ocxl: use put_device() instead of device_unregister()
- powerpc: Add TIDR CPU feature for POWER9
- powerpc: Use TIDR CPU feature to control TIDR allocation
- powerpc: use task_pid_nr() for TID allocation
- ocxl: Rename pnv_ocxl_spa_remove_pe to clarify it's action
- ocxl: Expose the thread_id needed for wait on POWER9
- ocxl: Add an IOCTL so userspace knows what OCXL features are available
- ocxl: Document new OCXL IOCTLs
- ocxl: Fix missing unlock on error in afu_ioctl_enable_p9_wait()
* Critical upstream bugfix missing in Ubuntu 18.04 - frequent Xorg crash after
suspend (LP: #1776887)
- ocxl: Document the OCXL_IOCTL_GET_METADATA IOCTL
* Hard LOCKUP observed on stressing Ubuntu 18 04 (LP: #1777194)
- powerpc: use NMI IPI for smp_send_stop
- powerpc: Fix smp_send_stop NMI IPI handling
* IPL: ppc64_cpu --frequency hang with INFO: rcu_sched detected stalls on
CPUs/tasks on w34 and wsbmc016 with 920.1714.20170330n (LP: #1773964)
- rtc: opal: Fix OPAL RTC driver OPAL_BUSY loops
* [Regression] EXT4-fs error (device sda2): ext4_validate_block_bitmap:383:
comm stress-ng: bg 4705: bad block bitmap checksum (LP: #1781709)
- SAUCE: Revert "UBUNTU: SAUCE: ext4: fix ext4_validate_inode_bitmap: comm
stress-ng: Corrupt inode bitmap"
- SAUCE: ext4: check for allocation block validity with block group locked
-- Timo Aaltonen <timo.aalto...@canonical.com> Wed, 18 Jul 2018
15:56:13 +0300
** Changed in: linux-oem (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1778029
Title:
Use "Medium power with Device Initiated PM" as default LPM policy for
mobile SATA devices
Status in linux-oem package in Ubuntu:
Triaged
Status in linux-oem source package in Bionic:
Fix Released
Bug description:
===SRU Justification===
[Impact]
Intel CPU can't reach beyond Package C-State 3 (PC3). Drains lots of power.
[Test]
Check the value of
/sys/devices/pci0000:00/0000:00:17.0/ata1/host0/scsi_host/host0/link_power_management_policy.
It's med_power_with_dipm as default.
Also check the powertop, it can reach PC8.
[Fix]
Introduce a new config to let AHCI pick med_power_with_dipm for mobile
platforms.
[Regression Potential]
Medium. Some SATA devices are broken under med_power_with_dipm or min_power.
Fortunately this is for -oem kernel only, so every SATA device gets tested
before shipping to customers.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-oem/+bug/1778029/+subscriptions
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