** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1796949
Title:
[Bionic] CPPC bug fixes
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
In Progress
Bug description:
[Impact]
A number of CPPC related fixes from upstream needed for Cavium ThunderX2
systems.
[Fix]
58e1c03536c9 ACPI / CPPC: Fix invalid PCC channel status errors
b8b10bc2015c cpufreq: CPPC: Don't set transition_latency
d29abc836843 ACPI / CPPC: Update all pr_(debug/err) messages to log the
susbspace id
[Test]
A test kernel is available in ppa:yarmouth-team/cppc-tx2. This kernel was
successfully tested on a CN99XX system.
[Regression Potential]
The cppcontrol feature needs to be explicitly enabled in firmware (default is
disabled) for these patches to be in effect. Risk of regression is low.
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