linux-kernel - Re: [PATCH v2] Re: Battery class driver.

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

Message-ID: <454A306C.3050200@tmr.com>
Date:	Thu, 02 Nov 2006 12:52:44 -0500
From:	Bill Davidsen <davidsen@....com>
To:	Jean Delvare <khali@...ux-fr.org>
CC:	davidz@...hat.com, Richard Hughes <hughsient@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Dan Williams <dcbw@...hat.com>, linux-kernel@...r.kernel.org,
	devel@...top.org, sfr@...b.auug.org.au, len.brown@...el.com,
	greg@...ah.com, benh@...nel.crashing.org,
	linux-thinkpad mailing list <linux-thinkpad@...ux-thinkpad.org>,
	Pavel Machek <pavel@...e.cz>
Subject: Re: [PATCH v2] Re: Battery class driver.

Jean Delvare wrote:
> On 10/31/2006, man with no name wrote:
>> In the case at hand we have mWh and mAh, which measure different
>> physical quantities. You can't convert between them unless you have
>> intimate knowledge of the battery's chemistry and condition, which we
>> don't.
> 
> You just need to know the voltage of the battery, what else?
> 
>> And it would be nice to also allow for power supply devices that use
>> other, incompatible units like "percent" or "minutes" or "hand crank
>> revolutions".
> 
> Do such batteries exist at the moment, or are you just speculating?

I have seen joules (or mJ) on a laptop. Yes, it was Windows, but I bet 
the report came from hardware. Some vendor getting anal about metric?
 > I
> don't quite see how a battery could report remaining energy in time
> units, as power consumption varies over time. Hand crank revolutions
> wouldn't be a very useful unit either, unless you know how much energy
> a revolution provides, and then you can just convert it. Percent would
> make some sense, but you can only express the remaining energy this way,
> not the total. And if you know the total in mAh or mWh, you can multiply
> by the percentage and you get the remaining energy in the same unit.
> 
> --
> Jean Delvare


-- 
Bill Davidsen <davidsen@....com>
   Obscure bug of 2004: BASH BUFFER OVERFLOW - if bash is being run by a
normal user and is setuid root, with the "vi" line edit mode selected,
and the character set is "big5," an off-by-one errors occurs during
wildcard (glob) expansion.
-
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/