** Changed in: linux-oem-6.0 (Ubuntu Jammy)
Status: In Progress => Fix Committed
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Jammy)
Status: New => Invalid
** Changed in: linux (Ubuntu Kinetic)
Status: New => Invalid
** Changed in: linux (Ubuntu Lunar)
Status: New => Invalid
** Changed in: linux (Ubuntu Lunar)
Status: Invalid => Triaged
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.0 in Ubuntu.
https://bugs.launchpad.net/bugs/1993242
Title:
Fix a race condition with AMD PMF and Thinkpad-ACPI
Status in HWE Next:
New
Status in linux package in Ubuntu:
Triaged
Status in linux-oem-6.0 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Invalid
Status in linux-oem-6.0 source package in Jammy:
Fix Committed
Status in linux source package in Kinetic:
Invalid
Status in linux-oem-6.0 source package in Kinetic:
Invalid
Status in linux source package in Lunar:
Triaged
Status in linux-oem-6.0 source package in Lunar:
Invalid
Bug description:
[SRU Justification]
[Impact]
Depending on module load order there is a possibility that the AMT mode
selected initially by PMF will be incorrect if thinkpad_acpi has loaded
first.
[Fix]
To avoid this issue adjust the initialization order in the PMF driver.
Commit 22ee98cb696e ("platform/x86/amd/pmf: install notify handler after
acpi init") takes the work, but it depends on two more commits that were
tagged as fixes for commits landed in bug 1987670.
[Test Case]
1. blacklist both amd-pmf and thinkpad-acpi
2. load thinkpad-acpi first
3. Load amd-pmf with dynamic debugging enabled
[Where problems could occur]
The first two parts are trivial, and the third one may have to receive
tests to find out if it has some other interference due to the load
order.
[Other Info]
AMD PMF targets oem-6.0 or above and has included in v6.1-rc1.
========== original bug report ==========
Depending on module load order there is a possibility that the AMT
mode selected initially by PMF will be incorrect if thinkpad_acpi has
loaded first.
To avoid this issue adjust the initialization order in the PMF driver.
https://github.com/torvalds/linux/commit/22ee98cb696e95b05a188756d479d382d93559ef
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