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Re: Does Linux 4.16.1 blast out battery time? (9h+ -> 3h+)
From: |
Pierre Neidhardt |
Subject: |
Re: Does Linux 4.16.1 blast out battery time? (9h+ -> 3h+) |
Date: |
Fri, 13 Apr 2018 13:03:48 +0530 |
User-agent: |
mu4e 1.0; emacs 26.1 |
I ran two powertop reports comparing 4.14.33 and 4.16.1.
The most obvious difference is this on 4.16.1:
--8<---------------cut here---------------start------------->8---
* * * Top 10 Power Consumers * * *
Usage;Events/s;Category;Description
100.0%;;Device;Audio codec hwC0D0: Realtek
0.0%; 47.0;Timer;tick_sched_timer
0.2%; 38.0;Process;[PID 1258] xterm
0.0%; 34.3;Process;[PID 539] dzen2 -p -dock -ta l -fn DejaVu Sans Mono
0.7%; 21.3;Process;[PID 568]
/gnu/store/07g1rwvrj7wn4sw6hx10hbvcs1v2adyf-emacs-prerelease-26.1-rc1/bin/emacs-26.1
--daemon -f exwm-enable
0.1%; 22.3;Interrupt;[0] HI_SOFTIRQ
0.3%; 12.9;Process;[PID 538] conky
0.0%; 13.1;Process;[PID 8] [rcu_sched]
0.0%; 8.6;Process;[PID 428]
/gnu/store/183jf5g6qsql1i8zrgnziz5psvms68pc-xorg-server-1.19.6/bin/X -xkbdir
/gnu/store/fpgz8f64dnz7szskjybrwkz4l9yl1
0.0%; 6.0;Timer;intel_uncore_fw_release_timer
--8<---------------cut here---------------end--------------->8---
That Realtek audio codec looks awfully suspicious.
Sounds a like a think to report on the kernel mailing list?
--
Pierre Neidhardt
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