Can you attach the acpidump output of this machine? Can you attach the output of "grep . /sys/class/thermal/*/*" both when the system is cool and overheat? > -----Original Message----- > From: jack.kelly.productions@xxxxxxxxxxxxxx > [mailto:jack.kelly.productions@xxxxxxxxxxxxxx] On Behalf Of Jack Kelly > Sent: Monday, October 01, 2012 4:51 PM > To: R, Durgadoss > Cc: linux-acpi@xxxxxxxxxxxxxxx; Zhang, Rui > Subject: Re: HP laptop: fan off until CPU temp near 105 degrees C > Importance: High > > Dear ACPI list, Rui and Durga, > > I'm just wondering if you have any further thoughts or suggestions > regarding the issue whereby my laptop fan turns off when Linux boots? > > If not then are there any other avenues I should pursue? e.g. should I > try writing to HP support to let them know that something odd happens > with the firmware? > > If all else fails then I'll get my soldering iron out and permanently > send power to the CPU fan. > > Thanks, > Jack > > > > On 24 September 2012 18:04, Jack Kelly <jack-list@xxxxxxxxxx> wrote: > > > > On 24 September 2012 17:47, R, Durgadoss <durgadoss.r@xxxxxxxxx> > wrote: > > > IMO, this crit_alarm should become 1 when your CPU temperature > > > reaches > > > 105 C. Does this happen ? > > > > No, crit_alarm stays set to 0 even when CPU temp hits 105. > > > > > Okay, That explains a bit of it. You have CPU cores and LCD > > > registered as cooling devices. But I believe throttling these > things > > > would require some intelligence/information from ACPI tables.. Not > > > sure whether your BIOS has them.. May be Rui can help us here.. > > > > My CPU definitely throttles. When idling the CPU freq is 1.2GHz; > when > > fully loaded it's 2.4GHz (according to /proc/cpuinfo) > > > > > AFAIK, The coretemp driver does not do/handle any hysteresis like > this. > > > My best guess is again the BIOS has something configured to do like > this. > > > > Oh yes, I should mention: the BIOS setup has an option "Fan Always on > > while on AC Power". I've tried booting with this option on and with > > it off but it appears to make no difference to Linux. > > > > Thanks again, > > Jack -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
