> -----Original Message----- > From: Michael <confabul...@kintzios.com> > Sent: Tuesday, November 21, 2023 4:15 PM > To: gentoo-user@lists.gentoo.org > Subject: Re: [gentoo-user] Abnormal processor temperature. > > On Tuesday, 21 November 2023 22:12:28 GMT Laurence Perkins wrote: > > I have a system here running an Intel N97 processor, which is idling > > at 70-80C on Gentoo with all cores 99% idle. This is 40 degrees > > hotter than it runs on Ubuntu or Windows 10. > > > > Powertop confirms that the CPU is spending nearly all of its time in > > idle mode. I have tried both the 6.1 and the 6.5 kernels, including > > the pre-compiled gentoo-kernel-bin version just to be sure it's not > > something in *my* config messing it up. > > > > I'm not really sure where to look next. There doesn't seem to be > > anything actually *using* the CPU or GPU to any significant degree. > > Certainly not enough to explain the temperature difference. If anyone > > has advice on what diagnostics to try next to find out what's going on I'd > > appreciate it. > > > > Thanks, > > LMP > > The fact you get a report of 40° hotter temperature does not mean the CPU > temperature is actually higher. Do you get any other indications the PC is > running hot, e.g. the fans are spinning faster, the heatsink is hotter to the > touch, or when measured with an infrared thermometer? > > Is the 'sensors' command output, after you have run sensors-detect, different > than Ubuntu's? > > Is the content of /etc/sensors3.conf different between the two distros? > > Are there different sensor modules loaded? > > Some chip drivers report spurious results and need specifying a different > measurement method/sensor device. You can take a look here for you CPU/MoBo > chip: > > https://www.kernel.org/doc/Documentation/hwmon/ >
Sorry, I forgot to mention that. The fans definitely run faster. Which is fortunate because checking with an IR thermometer on the CPU heatsink produces more varied results than the internal sensor, but still 30-40° hotter. Driver modules loaded by each distro don't seem substantially different. Ubuntu has intel-spi loaded while Gentoo does not, but that's it for differences from lspci. I can look for other differences as well, but it doesn't seem to be a difference in sensor calibration unfortunately. Also of note, this same stage4 OS snapshot runs on other systems without anything unusual happening, but this is the only configuration using the N97 processor. LMP
