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Beitrag: <blockquote data-quote="HotshotBerlin" data-source="post: 239926">AW: Aspire 7738 G - Windows friert ein - Temperaturproblem ?!Hallo alle 7738G-Liebhaber,meiner Meinung nach habe ich die Lösung gefunden. Als ich kein Muttersprachler bin, werde ich alles auf Englisch schreiben - es tut mir leid, wollte aber meine Erfindung Ihnen mitteilen. Falls jemand meine Erklärungen zu übersetzen Lust hat, wäre ich sehr dankbar <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />OK. As a few users noticed throughout this thread, the problem (that is short flicker & immediate freeze, without bluescreen or meaningful error message) occurs always when the computer is under low activity ; no freeze happens during intensive 3D gameplay for instance. It is also obviously NOT related to an overheating issue (computer at idle & low temp measured). As far as I know, the problem occurs under Win Vista and 7 as well (also tried Ubuntu: same issue) and always with nVidia graphic cards (GT130M, GT240M...).N.B. Please remember similar issues can occur on other computers for very different reasons - especially with such general symptoms - so it makes little sense reporting bluescreens or related bugs that affect other laptop models.Hypothesis: This "low activity" failure hints strongly at an issue with power-saving features of the laptop, or at least one of its components... It could be either the CPU, or the graphic card - both "energy hungry" components that implement power-saving strategies.The (probable) answer: just disable the faulty power-saving features. At the moment, it is not clear whether the bug comes from the CPU (e.g. Intel's so called 'SpeedStep', 'EIST' and/or 'C states' in its mobile processors) or the nVidia card (with its 'Powermizer' feature also known as 'Adaptive power strategy', which constantly adjust the speed of the graphic cores and memory).At the moment, I have disabled such features in both my Intel CPU and nVidia GPU. The temp gets of course a bit higher, nothing dramatic however. I still have to track down whether only one component or the interplay between both is to blame.How to do that:- to "lock" the Intel CPU at a constant speed and deactivate its power-saving features, I use a tiny freeware "ThrottleStop" (v2.00b27). More specifically, I locked clock & chip modulation at 100%, locked the multiplier and voltage at the nominal values for my processor (easy to find on the web or with some utilities), unchecked the 'power saver' and 'C states' feature, and optionally disabled 'Turbo' at the same time (to keep the Core2Duo from automatic overclocking).- to disable the nVidia Powermizer 'adaptive consumption policy', I used two steps which are probably redundant (but better safe than sorry!). First: In the nVidia Control Panel (right-click on your desktop, you'll find it) I 'manage the advanced 3D parameters' ('global parameters') and switch the 'power management mode' value to 'maximum performance'. Second: I completely disable the Powermizer feature through registry settings, thanks to a tiny freeware called nVidia Powermizer Manager (v 0.95). Just let it create the registry values if necessary, then disable the feature, apply, reboot.What are the consequences?<ul> <li data-xf-list-type="ul">Of course the CPU will run at full speed and use no power-saving feature. It will get a bit hotter than before but that should not make your laptop burn anyway, CPUs have built-in security functions and should never fail under constant full load unless the fan is dead.</li> </ul><ul> <li data-xf-list-type="ul">Of course the Nvidia graphic card will run at full speed and use no power-saving feature. It will probably make your laptop even hotter, your laptop fan will probably blow constantly at small speed to evacuate the excess heat ; however Nvidia also implements some security mechanisms (don't disable that!). On the other hand, a tiny advantage: the graphic card will no longer adjust its clock speed depending on activity, which makes the interface appear to run constantly 'smooth'.</li> </ul><ul> <li data-xf-list-type="ul">Of course your laptop will consume more power when on battery - and therefore it won't last as long as before ; well... it's a necessary evil if you want to keep it from freezing.</li> </ul>WARNING: before following such advice and disabling power-related features, please check that your laptop's heatfan is fit, that no dust has accumulated etc. Please keep an eye on your system's temperature (CPU, GPU, whole laptop) at least for the first few days. Make sure that you can use it normally within reasonable temperature limits.Until now, my laptop (Aspire 7738G 844G50Bn bought 2 months ago, Win7x64, Nvidia drivers 257.15b, clean setup) has been running  fine, no freeze at all during normal use and when left at idle overnight. I will keep doing experiments with all this big bag of power-saving features, enabling/disabling them one at a time until I can identify the precise cause. Well, it takes time since the bug can appear two times an hour or not at all for weeks... If I find something new, I'll let you know. In the meantime, advanced users (only!) who suffer from the same bug could also check if the solution works, experiment with disabling either CPU or GPU features, then report fail/success here <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />Danke für Ihre Aufmerksamkeit, liebe Grüße aus Berlin <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /></blockquote>

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