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#1 2012-09-27 23:40:34

FugitivePlatypus
Member
Registered: 2012-06-05
Posts: 10

sensors-detect changes monitor settings.

I was trying to get sensors working, so i ran the command $ sudo sensors-detect.  While it was running the "Safe" probes, my monitor flickered a few times and when it settled, the image was slightly off.  I'm not sure what exactly is wrong, but it's slightly fuzzier and slightly lighter.  when I run the command again, it seems to switch back and forth between two states, both of which are slightly different than it was before.  It happens during this probe:


Next adapter: i915 gmbus panel (i2c-2)
Do you want to scan it? (YES/no/selectively):
Client found at address 0x4f
Probing for `National Semiconductor LM75'...                No
Probing for `National Semiconductor LM75A'...               No
Probing for `Dallas Semiconductor DS75'...                  No
Probing for `Dallas Semiconductor DS1621/DS1631'...         No
Probing for `Maxim MAX6642'...                              No
Probing for `Texas Instruments TMP421'...                   No
Probing for `Texas Instruments TMP422'...                   No
Probing for `Maxim MAX6633/MAX6634/MAX6635'...              No
Probing for `NXP/Philips SA56004'...                        No
Client found at address 0x50
Probing for `Analog Devices ADM1033'...                     No
Probing for `Analog Devices ADM1034'...                     No
Probing for `SPD EEPROM'...                                 No
Probing for `EDID EEPROM'...                                Yes
    (confidence 8, not a hardware monitoring chip)

Any help would be greatly appreciated.  Also, it seems to be a hardware issue, because it's changed for other operating systems as well.  The computer in question is a laptop, so manually changing color levels is out of the question as far as I know.

Edit:

$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GT 650M] (rev ff)

Last edited by FugitivePlatypus (2012-09-28 22:44:33)

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#2 2012-09-28 22:01:58

teateawhy
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From: GER
Registered: 2012-03-05
Posts: 1,009
Website

Re: sensors-detect changes monitor settings.

You could include the output of the command into your description.

lspci | grep VGA

Last edited by teateawhy (2012-09-28 22:02:30)

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#3 2012-09-28 22:45:20

FugitivePlatypus
Member
Registered: 2012-06-05
Posts: 10

Re: sensors-detect changes monitor settings.

Edited with info, let me know if I should include anything else.

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#4 2012-09-28 22:47:37

nomorewindows
Member
Registered: 2010-04-03
Posts: 2,962

Re: sensors-detect changes monitor settings.

The sensor interface seems to be treating the EDID/SMBus from the monitor as if it is a regular sensor.

Last edited by nomorewindows (2012-09-28 22:48:05)


I may have to CONSOLE you about your usage of ridiculously easy graphical interfaces...
Look ma, no mouse.

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#5 2012-09-28 22:59:19

WonderWoofy
Member
From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: sensors-detect changes monitor settings.

My intel card w/ sensors-detect detects the EDID the same though, and I do not experience these isues.

Next adapter: i915 gmbus panel (i2c-2)
Do you want to scan it? (YES/no/selectively): 
Client found at address 0x50
Probing for `Analog Devices ADM1033'...                     No
Probing for `Analog Devices ADM1034'...                     No
Probing for `SPD EEPROM'...                                 No
Probing for `EDID EEPROM'...                                Yes
    (confidence 8, not a hardware monitoring chip)

I think the significant part is that it has an 8/10 confidence that it is not a hw monitoring chip.

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#6 2012-09-28 23:16:33

FugitivePlatypus
Member
Registered: 2012-06-05
Posts: 10

Re: sensors-detect changes monitor settings.

Also, it might be noteworthy that the NVidia card is never switched on during the process (optimus w/ bumblebee).

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#7 2012-10-04 15:24:31

FugitivePlatypus
Member
Registered: 2012-06-05
Posts: 10

Re: sensors-detect changes monitor settings.

So I was doing some research on i2c, and i ran the command $ sudo i2cdump 2 0x4f, after running $ sudo modprobe i2c-dev, which while it was dumping the registry values faded through different settings on my monitor.  Restricting the dump to $ sudo i2cdump -r 0x60-0x91 2 0x4f left the monitor in (as far as I can tell) the condition it was in originally.  This is not persistent, however, and resets for different operating systems/reboots of arch.

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#8 2012-10-04 17:59:23

nomorewindows
Member
Registered: 2010-04-03
Posts: 2,962

Re: sensors-detect changes monitor settings.

FugitivePlatypus wrote:

So I was doing some research on i2c, and i ran the command $ sudo i2cdump 2 0x4f, after running $ sudo modprobe i2c-dev, which while it was dumping the registry values faded through different settings on my monitor.  Restricting the dump to $ sudo i2cdump -r 0x60-0x91 2 0x4f left the monitor in (as far as I can tell) the condition it was in originally.  This is not persistent, however, and resets for different operating systems/reboots of arch.

i2c was what I was trying to remember.
i2c-tools i2c tools that used to be part of lm-sensors.

Last edited by nomorewindows (2012-10-04 18:00:30)


I may have to CONSOLE you about your usage of ridiculously easy graphical interfaces...
Look ma, no mouse.

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#9 2015-01-20 23:11:04

relh
Member
Registered: 2015-01-20
Posts: 1

Re: sensors-detect changes monitor settings.

Did you guys ever resolve this issue? I have the same one on a Lenovo y50

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#10 2015-01-21 00:10:55

headkase
Member
From: Canada
Registered: 2011-12-06
Posts: 1,411
Website

Re: sensors-detect changes monitor settings.

Your monitor should have an "auto-config" or "auto-adjust" button on it or in one of its menus.  Try that first.

Also, necrobump.

Last edited by headkase (2015-01-21 00:11:36)


We all make choices, but in the end, our choices make us.

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#11 2015-01-21 00:59:07

jasonwryan
Forum & Wiki Admin
From: .nz
Registered: 2009-05-09
Posts: 18,326
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Re: sensors-detect changes monitor settings.


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