Bug 110641 - lm_sensors reports "ERROR: Can't get value of subfeature in0_input: Can't read"
Summary: lm_sensors reports "ERROR: Can't get value of subfeature in0_input: Can't read"
Status: RESOLVED MOVED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/AMDgpu (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
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Reported: 2019-05-08 07:28 UTC by Bong Cosca
Modified: 2019-11-19 09:25 UTC (History)
0 users

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Attachments

Description Bong Cosca 2019-05-08 07:28:04 UTC 
Alex Deucher <alexander.deucher@amd.com> 2017-03-08 18:25:15 -0500
drm/amdgpu: expose GPU sensor related information
commit 5ebbac4b5c9159130046bf7c56b7f4c71ca7d1b7

This particular commit introduced this error.

$ sensors -j

{
   "amdgpu-pci-0008":{
      "Adapter": "PCI adapter",
      "vddgfx":{
ERROR: Can't get value of subfeature in0_input: Can't read

      },
      "vddnb":{
ERROR: Can't get value of subfeature in1_input: Can't read

      },
      "temp1":{
         "temp1_input": 12.000,
         "temp1_crit": 120.000,
         "temp1_crit_hyst": 90.000
      }
   },
   "it8603-isa-0290":{
      "Adapter": "ISA adapter",
      "CPU Fan":{
         "fan1_input": 2509.000,
         "fan1_min": 200.000,
         "fan1_alarm": 0.000
      },
      "Mobo Fan":{
         "fan2_input": 0.000,
         "fan2_min": 600.000,
         "fan2_alarm": 1.000
      },
      "AMD A6-7400K Radeon R5":{
         "temp1_input": 44.000,
         "temp1_max": 127.000,
         "temp1_min": -45.000,
         "temp1_alarm": 0.000,
         "temp1_type": 4.000,
         "temp1_offset": 0.000
      },
      "Asus A68HM-K Mobo":{
         "temp2_input": 45.000,
         "temp2_max": -33.000,
         "temp2_min": 53.000,
         "temp2_alarm": 1.000,
         "temp2_type": 4.000,
         "temp2_offset": 0.000
      }
   }
}
Comment 1 Alex Deucher 2019-05-08 15:42:06 UTC 
That commit just exposes the temperature via an ioctl interface.  It doesn't affect the hwmon sysfs API.  How did you determine that that was the problematic one?
Comment 2 Bong Cosca 2019-05-08 21:58:28 UTC 
It wasn't the case before when VDDGFX and VDDNB were not exposed. Are these (and the missing in0_input/in1_input probes) present on APUs?
Comment 3 Alex Deucher 2019-05-09 02:15:26 UTC 
What chip do you have?  Voltage hwmon is not implemented on all APUs.
Comment 4 Bong Cosca 2019-05-09 03:40:57 UTC 
AMD A6-7400K Radeon R5
Comment 5 Alex Deucher 2019-05-09 03:51:25 UTC 
(In reply to Bong Cosca from comment #4)
> AMD A6-7400K Radeon R5

No hwmon support for voltage on that family.
Comment 6 Bong Cosca 2019-05-09 05:17:07 UTC 
So does it make sense to expose VDDGFX and VDDNB at all? Or should this be fixed in lm_sensors?
Comment 7 Martin Peres 2019-11-19 09:25:32 UTC 
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