On 7/14/20 4:17 PM, Alexey Galakhov wrote: > Hi, > > I'm facing the same problem. I did some research on my machine. > > On Fri, 2020-07-03 at 10:10 -0700, Guenter Roeck wrote: > >> There is nothing much if anything we can do about that. The NCT6798D >> datasheet reports temperature source 28 as reserved. You could ask >> Asus for support, but their usual response is that they don't support >> Linux. > > Looks like there are different versions of the datasheet. The one of > NCT6796D, Revision 0.6 states that 28 (0x1c or 11100) is "Select PECI We are talking about NCT6798D here. > Agent 0 Calibration as CPUFAN monitoring source." This seems to be correct > since the fan in question is the CPU one and the value of "PECI Agent 0 > Calibration" is actually very similar to the CPU temperature and rises > with CPU load. > > Also, looking at the driver code I found no signs of reading so-called > "HM Read-Only Registers". They are described in section 9.481 of the > above datasheet. They are I/O ports (readable with `inb`) with their > base address located in configuration registers 0x64 and 0x65 of the > SuperIO. Some temperatures seem to be directly readable only through > these registers. Looks like the driver monitors all temperatures only > indirectly via switchable channels, is it true? > I have no idea how to access the "HM Read-Only" registers. The datasheets are not exactly verbal about it. Guenter
