On Friday 24 November 2017 13:28:59 Oleksandr Natalenko wrote: > On pátek 24. listopadu 2017 12:25:43 CET Pali Rohár wrote: > > On Friday 24 November 2017 12:17:30 Oleksandr Natalenko wrote: > > > > There are two patches waiting to be tested in > > > > https://bugzilla.kernel.org/show_bug.cgi?id=195751 > > > > > > Tested and attached a couple of patches on top of those to the BZ. If > > > disabling fan control is the only approach here, I can confirm that this > > > works. > > > > Hi! Please figure out which SMM call (they are identified by eax and ebx > > registers) cause this freeze. So we would now what needs to be > > blacklisted. > > Here it goes: > > [ 7.191081] dell_smm_hwmon: smm(0x10a3 0x0000) = 0x002e (took 1837 usecs) > [ 7.194007] dell_smm_hwmon: smm(0x00a3 0x0001) = 0xffff (took 151 usecs) > [ 7.198239] dell_smm_hwmon: smm(0x00a3 0x0000) = 0x0002 (took 1411 usecs) > [ 7.199095] dell_smm_hwmon: smm(0x02a3 0x0001) = 0xffff (took 71 usecs) > [ 7.700493] dell_smm_hwmon: smm(0x02a3 0x0000) = 0x157c (took 488912 usecs) > [ 7.701277] dell_smm_hwmon: smm(0x0025 0X0000) = 0xffff (took 71 usecs) > > 0x02a3 is I8K_SMM_GET_SPEED.
Ok, so it is really a good idea to disable fan control completely on your machine. Your last patch in bugzilla looks ok, you add my Reviewed-by: Pali Rohár <pali.ro...@gmail.com> -- Pali Rohár pali.ro...@gmail.com
