<br><br><div class="gmail_quote">On Mon, Jul 6, 2009 at 7:53 PM, Fernando Cassia <span dir="ltr"><<a href="mailto:fcassia@gmail.com">fcassia@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <br><br><div class="gmail_quote"><div class="im">On Mon, Jul 6, 2009 at 4:07 PM, Leslie Satenstein <span dir="ltr"><<a href="mailto:leslie.satenstein@gmail.com" target="_blank">leslie.satenstein@gmail.com</a>></span> wrote:<br> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br> </blockquote></div> My thoughts are that it is a physical problem, possibly clogged processor cooling fins. 狢 once removed the heat sink (I DO NOT RECOMMEND THIS), and reapplied new heat-conducting goo and reseated the heatsink.</blockquote> </div><div><br>The same system does NOT exhibir the fan up-and-down when booted with XP64, but does with F11... <br><br>I think it might be related to AMD愀 Powernow (is it supported in Linux?) where the CPU adapts power consumption due to cpu load, and interaction with the BIOS.<br> <br>The Sun w1100z for instance once had a BIOS bug that made it loud during the whole boot process and the internal fans (not CPU fans but case fans) only slowed after WinXP fully booted.. A BIOS update from Sun Micro fixed it.<br> <br>So I悲 GUESS there愀 some relation between bios, temperature sensors (CPU and CASE internal temp sensors), and maybe AMD powernow - cpu load as well. It悲 be interesting for me to know how the Linux kernel interacts with all this...</div> </div></blockquote><div><br>Shooting in the dark here... and this tech note doesn愒 show any dates...<br><br><a href="http://h18000.www1.hp.com/products/servers/linux/powernow-notes.html">http://h18000.www1.hp.com/products/servers/linux/powernow-notes.html</a> <br> </div></div><br>In any case, I see here<br><a href="https://admin.fedoraproject.org/pkgdb/packages/name/cpuspeed#Fedora11">https://admin.fedoraproject.org/pkgdb/packages/name/cpuspeed#Fedora11</a><br>that CPUspeed is included. I must check next time I boot the box if it愀 installed and enabled, and if there愀 anything which can be tweaked.<br> <br>FC<br><br>