On Wednesday, 22 November 2023 01:34:00 GMT Laurence Perkins wrote: > > -----Original Message----- > > From: Michael <[email protected]> > > Sent: Tuesday, November 21, 2023 4:15 PM > > To: [email protected] > > 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.
OK, it's definitely not a sensor misreading the temperature then. > 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. In the first instance I suggest you add SPI module(s) to your kernel. It controls comms with sensors and peripherals, so it could well play an important role in controlling the MoBo temperature.
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