#23 Calibration freezes on step 3.

[Kuba Niewiarowski]

marsjan@lena~$ calise
Calise-0.4.0 (C) 2011 Nicolo' Barbon

Step 1 of 7
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This passage gets a valid profile name to be stored as config file's filename.
>>> profile name: default
>>> profile path: /home/marsjan/.config/calise/default.conf


Step 2 of 7
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This passage lists all available sysfs backlight directories and, if more than one, asks wich has to be used.
>>> sysfs backlight path: /sys/class/backlight/intel_backlight/brightness


Step 3 of 7
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This passage obtains available backlight steps with selected sysfs backlight path and displays them ordered from lower to higher backlight level.
The program will now try to semi-automatically find the minimum backlight level (before "power-off") for this machine.

NOTE: If you'll get a blank screen don't worry and just wait the default timeout (20 seconds)

Hit ENTER or RETURN when ready

And... nothing. ^C:

Traceback (most recent call last):
  File "/usr/bin/calise", line 120, in <module>
    CliCalibration(defName, brPath=calise.options.arguments.path)
  File "/usr/lib/python2.7/dist-packages/calise/calibration.py", line 392, in __init__
    self.BacklightPassage()
  File "/usr/lib/python2.7/dist-packages/calise/calibration.py", line 570, in BacklightPassage
    bkofs = getMinimumLevel(self.bfile)
  File "/usr/lib/python2.7/dist-packages/calise/calibration.py", line 65, in getMinimumLevel
    with open(blpath, 'w') as fp:
KeyboardInterrupt

[Nicolò Barbon]

Hi and thank you for reporting the bug.
If you're using calise version 0.4.0 give a try at current latest version 0.4.2 or just try the git-master version in the meanwhile.
You will find instructions on how to build/install it on http://calise.sourceforge.net/mediawiki/index.php/Installation#Obtain_Calise

Anyway, about the bug you reported, it's quite strange for the program to freeze on fileopen.
Did you press Return or Enter when asked (sorry about this question but I need to know as much as i can about the situation)?

[Tamsyn]

I'm getting the same error on two different Ubuntu installs (15.04 and 14.04), and yes I pressed enter. When running #env python setup.py build I got an error message: Python module msvcrt not found, which I doubt is relevant (since that's a Windows library from what I can discover).

I think, perhaps, this recommendation from the included INSTALL file may be more helpful:

• NOTE: before you proceed with calibration-step 3, you have to give write
  permissions to the file returned by step 2 (sysfs backlight path):
  $ interface= #type here the file returned on calibration-step 2 (eg. /sys/class/backlight/acpi_video0/brightness)
  # chmod 666 $interface*

Which I'm struggling to understand / do. Thanks!

[Escoban]

I'm getting the exact same error on OpenSUSE 42.1 and indeed

sudo chmod 666 /sys/class/backlight/intel_backlight/brightness

fixes it.