[argyllcms] Re: Lenovo ThinkPad W530 Colorimeter

  • From: William Cohen <giantklein@xxxxxxxxx>
  • To: "argyllcms@xxxxxxxxxxxxx" <argyllcms@xxxxxxxxxxxxx>
  • Date: Wed, 8 Aug 2012 19:01:08 -0700 (PDT)


I did some investigation and found that the lid-close is controlled by a 
magnetic sensor on the left side of the screen about 4/10 of the way up from 
the bottom of the lcd bezel.  There is a matching magnet on the left edge of 
the computer directly to the left of the CapsLocks key.  I tried using the 
gnome-tweak-tool to make "Laptop lid close action on battery" and "Laptop lid 
close action when on AC" be "Nothing".  However, the LCD screen is still 
blanked even with those set to nothing.  Even when the machine is in the bios 
setup screen the screen will be blanked when a magnet is next to the sensor.  
The sesnor also appears to disable input from the laptop's keyboard.  Can see 
the magnet affect the state of /proc/acpi/button/lid/LID/state with:

# while true; do cat /proc/acpi/button/lid/LID/state; sleep 1; done
state:      open
state:      open
state:      open
state:      closed
state:      closed

The kernel does load the thinkpad_acpi kernel module which appears to have a 
number of controls related to the display, but I do not know if there are any 
fields in there would address the problem. There is documentation at:



> From: Graeme Gill <graeme@xxxxxxxxxxxxx>
>To: argyllcms@xxxxxxxxxxxxx 
>Sent: Sunday, August 5, 2012 11:37 PM
>Subject: [argyllcms] Re: Lenovo ThinkPad W530 Colorimeter
>William Cohen wrote:
>> I am willing to try experimental code and locally compiled code to get
>> the colorimeter working Argyllcms running on Linux.
>    getting the instrument recognised is probably the easy part.
>The hard part is figuring out how to keep the display enabled
>with the lid shut. Unless or until you can figure that out,
>there's no much point in pursuing the use of this instrument.
>[ You would need to add 0x5010 to the recognised PID in spectro/insttypes.c
>  as well as fixing any udev rules. ]
>Graeme Gill.

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