The fans should come on first. It should never underclock the CPU except if the CPU is idle, or as a last resort.
--- Alejandro Zanotti <[EMAIL PROTECTED]> wrote: > The thing here I think is that when CPU throtles up due to processor > needs, > and temperature rises... it should stop underclock if temperature rises > to > much and come closer to critical temp, until temps comes down... but it > doesnt. > Thats the thing i think > > 2007/4/17, Paul Harrison <[EMAIL PROTECTED]>: > > > > I think some people are barking up the wrong tree with this one. There > > is a problem with the CPU overheating, but it has little or nothing to > > do with throttling, as the complaints are about the CPU overheating > when > > CPU usage is *supposed* to be high (ie compiling applications, etc) > > > > Throttling is a technique meant to be used during periods of *low* CPU > > usage. The purpose is to reduce the power consumption of the CPU when > it > > isn't doing much. You're not supposed to throttle the CPU when it's > > doing a lot of work except in a dire emergency, because that defeats > the > > purpose of having a fast CPU in the first place. A CPU that's throttled > > whenever it's doing a lot of work is essentially one that may feel > > slightly more responsive than an equivalent machine with a CPU that > runs > > at the slower speed by default, but is otherwise just as poorly > > performing. > > > > I have a Thinkpad T60. Until a couple of weeks ago, I was running > Debian > > sarge with a 2.6.16 kernel. I can tell you what's different between it > > and the Feisty install I have today: on the Debian machine, when the > > fans needed to come on full blast, they did. On the Feisty install, > they > > don't. Even typing "# echo level 7 > /proc/acpi/ibm/fan" to force the > > fans to their highest "supported" speed is not enough to actually get > > them to go at their documented rate. They certainly aren't making the > > same amount of noise. The only way I can permanently prevent my laptop > > from overheating is to override the rate control altogether with "# > echo > > level disengaged > /proc/acpi/ibm/fan" which does get the fans up to > > full speed, but makes it permanent (whereas under Debian, the fans > would > > only go to full speed if the laptop really was doing a lot of work. The > > various OpenGL screensavers and Unreal Tournament would do that.) > > > > If "level 7" fans meant the same thing under Feisty as it did under > > Sarge, I don't think there'd be a problem. > > > > I can manually enable throttling and have done so, but the result has > > been somewhat unusable: whenever I start anything from installing > > packages (gzip uses CPU...) to compiling a large program, the CPU speed > > plummets to something barely usable. I'm failing to see the point. I > can > > see using it if the CPU approaches an unsafe temperature even when fans > > are on full blast (essentially as a last resort, to save the system > from > > either burning up or turning off), but not if simply bumping up the fan > > speed would do the job. > > > > -- > > CPU overheats during high usage "throttling <not supported>" > > https://bugs.launchpad.net/bugs/22336 > > You received this bug notification because you are a direct subscriber > > of the bug. > > > > > -- > Alejandro Zanotti > ------------------------------------------------------------------------------- > "Hay 10 tipos de personas, las que saben leer binario y las que no" > > -- > CPU overheats during high usage "throttling <not supported>" > https://bugs.launchpad.net/bugs/22336 > You received this bug notification because you are a direct subscriber > of the bug. > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- CPU overheats during high usage "throttling <not supported>" https://bugs.launchpad.net/bugs/22336 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
