[SRU] [B/D/E/Unstable/OEM-B/OEM-OSP1-B] [PATCH 0/1] Disable unreliable HPET on CFL-H system
Kai-Heng Feng
kai.heng.feng at canonical.com
Tue Nov 12 12:59:36 UTC 2019
BugLink: https://bugs.launchpad.net/bugs/1852216
[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.
Kai-Heng Feng (1):
UBUNTU: SAUCE: x86/intel: Disable HPET on Intel Coffe Lake H platforms
arch/x86/kernel/early-quirks.c | 2 ++
1 file changed, 2 insertions(+)
--
2.17.1
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