From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: Devices eating too much power [was Re: Some thoughts on suspend/resume development] Date: Mon, 14 Mar 2005 00:11:15 +0100 Message-ID: <20050313231115.GA26692@elf.ucw.cz> References: <1110403931.8870.6.camel@desktop.cunningham.myip.net.au> <20050309214416.GG17034@elf.ucw.cz> <1110405336.8870.22.camel@desktop.cunningham.myip.net.au> <20050313181455.GD1579@elf.ucw.cz> <1110742612.12485.287.camel@localhost.localdomain> <20050313210322.GA7016@elf.ucw.cz> <1110750912.25040.12.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============54011270512120602==" In-Reply-To: <1110750912.25040.12.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces-qjLDD68F18O7TbgM5vRIOg@public.gmane.org Errors-To: linux-pm-bounces-qjLDD68F18O7TbgM5vRIOg@public.gmane.org To: Adam Belay Cc: Linux-pm mailing list , Nigel Cunningham List-Id: linux-pm@vger.kernel.org --===============54011270512120602== Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Ne 13-03-05 16:55:11, Adam Belay wrote: > On Sun, 2005-03-13 at 22:03 +0100, Pavel Machek wrote: > > > Also we don't really control display brightness. > > > > But display brightness does not really belong here, right? > > No, in some cases it's controlled by a separate ACPI device. I meant "I do not think we want to control display brightness by runtime suspend/resume". It may be a kernel job, but not for runtime suspend/resume. Backlight is really individual setting as much as power managment one. Even old monitors had brightness/contrast buttons, even if it did not spare any energy. > > Serial ports should not eat energy when not opened; fix it in the > > driver. > > > > What other devices do eat energy? > > Sound cards Yep, hw should power them down when not opened. > bridges (PCI, PCMCIA, USB, etc.) Agreed, bridges are interesting. Other stuff seems to be covered. Pavel -- People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! --===============54011270512120602== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============54011270512120602==--