Do you have definite response from Dell support that they are not going to fix it? Then it is pity :-( On Thursday 07 February 2019 12:16:06 Michele Sorcinelli wrote: > As far as I know Dell won't help with fixing the SMM layer, they probably > changed something starting with firmware version 1.3.0 and they don't > wanna release information about it. > > https://www.hwinfo.com/forum/Thread-Dell-XPS-15-9570-temperatures-not-named-anymore > > I wonder if something can be done to force the discovery of the sensors in the driver, > maybe adding a module option to use i8k_get_temp() as probe method as a workaround, > or maybe just forcing that method for this specific model? > > Let me know your thoughts. > > Thanks, > Michele. > > On 12/10/18 10:58 AM, Pali Rohár wrote: > > On Friday 07 December 2018 20:24:49 Guenter Roeck wrote: > > > Anyway, I would like to get some feedback if this can cause regressions > > > on systems which don't support that many sensors and maybe report something > > > completely different if one tries to read the high-numbered sensors. > > > I seem to recall that there was a reason for checking the type and not just > > > trying to read sensor values. > > > > There can be also different problem for sensors which are turned off. > > E.g. on notebooks with switchable graphic cards which have included > > temperature sensors. When graphic card is turned off, then SMM returns > > error when asking for temperature value (for obvious reason). But > > temperature type still returns correct value "this is GPU sensors". > > > > So we cannot replace temp_type check by temp_value check. It introduce > > race condition between "starting GPU" and initializing dell-smm hwmon. > > Now linux kernel has support for dynamic turning ON/OFF switchable GPU, > > so we need to care about these race conditions too. > > -- Pali Rohár pali.rohar@xxxxxxxxx
