Re: w83627ehf: Wrong values reported after resuming from suspend/hibernation

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On 07/28/2013 01:43 PM, Harald Judt wrote:
Hi,

Am 22.10.2012 23:40, schrieb Guenter Roeck:
On Mon, Oct 22, 2012 at 05:03:45PM +0200, Harald Judt wrote:
Hi,

After resuming from suspend or hibernation, the Vbat value is
reported to be 0.0. Before that, it reported the correct value.
Min/max values are wrong too.

Linux-3.6.2, ASRock Z77 Extreme4 BIOS v1.80.

Before suspend:
nct6776-isa-0290
Adapter: ISA adapter
Vcore:         +0.97 V  (min =  +0.00 V, max =  +1.74 V)
in1:           +1.84 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
AVCC:          +3.34 V  (min =  +2.98 V, max =  +3.63 V)
+3.3V:         +3.34 V  (min =  +2.98 V, max =  +3.63 V)
in4:           +1.04 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in5:           +1.68 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
3VSB:          +3.47 V  (min =  +2.98 V, max =  +3.63 V)
Vbat:          +3.31 V  (min =  +2.70 V, max =  +3.63 V)
fan1:            0 RPM  (min =    0 RPM)  ALARM
fan2:         1289 RPM  (min =    0 RPM)  ALARM
fan3:          724 RPM  (min =    0 RPM)  ALARM
fan4:          661 RPM  (min =    0 RPM)  ALARM
fan5:         1076 RPM  (min =    0 RPM)  ALARM
SYSTIN:        +37.0°C  (high =  +0.0°C, hyst =  +0.0°C)  ALARM
sensor = thermistor
CPUTIN:        +28.0°C  (high = +80.0°C, hyst = +75.0°C)  sensor =
thermistor
AUXTIN:        +33.0°C  (high = +80.0°C, hyst = +75.0°C)  sensor =
thermistor
PECI Agent 0:  +32.0°C
cpu0_vid:     +0.000 V
intrusion0:   ALARM
intrusion1:   ALARM

After resuming:
nct6776-isa-0290
Adapter: ISA adapter
Vcore:         +0.97 V  (min =  +0.00 V, max =  +1.74 V)
in1:           +1.84 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
AVCC:          +3.34 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
+3.3V:         +3.34 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in4:           +1.03 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in5:           +1.68 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
3VSB:          +3.47 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
Vbat:          +0.00 V  (min =  +0.00 V, max =  +0.00 V)
fan1:            0 RPM  (min =    0 RPM)  ALARM
fan2:         1271 RPM  (min =    0 RPM)  ALARM
fan3:          734 RPM  (min =    0 RPM)  ALARM
fan4:          673 RPM  (min =    0 RPM)  ALARM
fan5:         1093 RPM  (min =    0 RPM)  ALARM
SYSTIN:        +36.0°C  (high =  +0.0°C, hyst =  +0.0°C)  ALARM
sensor = thermistor
CPUTIN:        +26.5°C  (high = +80.0°C, hyst = +75.0°C)  sensor =
thermistor
AUXTIN:        +33.0°C  (high = +80.0°C, hyst = +75.0°C)  sensor =
thermistor
PECI Agent 0:  +30.0°C
cpu0_vid:     +0.000 V
intrusion0:   ALARM
intrusion1:   ALARM

Reloading the module helps. Of course, a fresh boot too ;-)

The driver doesn't implement suspend/resume support, so it is not very
surprising that the limits get lost - and it looks like vbat monitoring
is disabled by default, so that gets lost as well.

Someone would have to submit a patch to add suspend/resume support to
the driver ... any takers out there ?

Thanks,
Guenter

A while ago, support for suspend/resume has been added and this issue
was fixed and values are now preserved during suspend/resume.

3300fb4f88688029fff8dfb9ec0734f6e4cba3e7 hwmon: (w83627ehf) Force
initial bank selection
7e630bb55a52cfaa35011c0ebc2efc96f13e5135 hwmon: (w83627ehf) Add support
for suspend

But now with kernel 3.11-rc2, I noticed it only works in case of
suspend/resume, not hibernate/resume. I'm not sure this worked properly
with kernel 3.6.2 with the patch applied, though I think it did, but I
don't have that version available for verification at the moment. Of
course, I could test if necessary. Perhaps there is more to do for
hibernate/resume than for suspend/resume?

Can you test with the new nct6775 driver ? Probably it won't make a difference, but we'll likely drop nct6775/nct6776 support from the w83627ehf driver in the near future.

Either case, I'll have a look.

Thanks,
Guenter


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