This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1852216
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu Bionic)
Status: New => Incomplete
** Changed in: linux (Ubuntu Disco)
Status: New => Incomplete
** Changed in: linux (Ubuntu Eoan)
Status: New => Incomplete
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1852216
Title:
Disable unreliable HPET on CFL-H system
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem package in Ubuntu:
New
Status in linux-oem-osp1 package in Ubuntu:
New
Status in linux source package in Bionic:
Incomplete
Status in linux-oem source package in Bionic:
New
Status in linux-oem-osp1 source package in Bionic:
New
Status in linux source package in Disco:
Incomplete
Status in linux-oem source package in Disco:
Invalid
Status in linux-oem-osp1 source package in Disco:
Invalid
Status in linux source package in Eoan:
Incomplete
Status in linux-oem source package in Eoan:
Invalid
Status in linux-oem-osp1 source package in Eoan:
Invalid
Bug description:
[Impact]
TSC marked unstable by skewed HPET after Intel CFL-H SoC reached PC10
state.
[Fix]
Disable HPET on CFL-H SoC.
[Test]
I can confirm disabling HPET can workaround this issue.
[Regression Potential]
Low. TSC on recent Intel SoC is now an invariant clocksource, so it's
harmless to disable HPET on these platforms.
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