linux-kernel - Question about not saving power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <200812241050.24804.patrakov@gmail.com>
Date:	Wed, 24 Dec 2008 10:50:24 +0500
From:	"Alexander E. Patrakov" <patrakov@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: Question about not saving power

Hello.

I tried playing with some audio apps like JACK and fluidsynth, and noticed the 
following. If I set the parameters in JACK so that the latency becomes less 
than ~10 milliseconds, a faint tone appears in the headphones connected to the 
onboard sound card.

I guess that its frequency is the tone is the same as that of the interrupts 
generated by the sound card. The tone disappears if I run something like 
"while : ; do : ; done" that consumes CPU time continuously, so I guess this 
has something to do with the power-saving features and less-than-perfect PSU.

My question is: what are my options (like kernel parameters) to disable power-
saving features, other than running such CPU-eating process continuously?

-- 
Alexander E. Patrakov
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/