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 1864527
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
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https://bugs.launchpad.net/bugs/1864527
Title:
CPU0 is busy after S3 in Dell Precision 3530
Status in linux package in Ubuntu:
Incomplete
Bug description:
CPU0 (and sometimes other cores too) is not entering C10 half of the
time when system is idle. "top" shows a touchpad driver takes 5%~6% of
CPU usage, and "/proc/interrupts" reveals considerable interrupts from
the touchpad device. This results in additional 4~5 watt power
consumption.
This anomaly can be workarounded by simply touching the touchpad - in
other words, it is more visible when using a USB mouse.
This can be fixed by a kernel 5.5 commit 52cf93e63ee6 which is
included in bionic (4.15) and focal kernel (5.4) but not in eoan
(5.3).
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