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When inspecting the systems power usage trough powertop I recognized the
sd card reader is running 100% of time and consuming between 8 and 16 W
on my laptop despite not being even in use. Powertop prints:
11.5 W 100,0% Device USB device:
USB2.0-CRW (Generic)
This problem was not there when inspecting the power usage a few weeks before.
Also when inserting actually a sd-card the power usage shrinks drastically so
it is not even seen in powertop on the first places.
I have tested it with kernel version 5.13.0-21-generic and
5.13.0-22-generic and the problem exists on both, but it seems a bit
worse on 5.13.0-22-generic. I have not configured anything manually
there.
lsusb prints for the sd-card reader the following:
Bus 001 Device 003: ID 0bda:0138 Realtek Semiconductor Corp. RTS5138 Card
Reader Controller
I am using Ubuntu 21.10
Summary:
Ubuntu 21.10
Kernel version: 5.13.0-21-generic and 5.13.0-22-generic tested
What I expected to happen: SD card reader *not* eating up all that power when
not even in use
What happened instead: SD card reader eating up all that power when not even in
use
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment impish kernel-bug
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sd card reader runs 100% of time and consumes way too much power
https://bugs.launchpad.net/bugs/1953557
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