Centos7 _ dispcal: Error – new_disprd() failed with ‘Instrument Access Failed’

[drumzoo]

Hello,

I tried today to calibrate two brand new monitors today,

When I run Display Cal as root, it return to me

As pop up window:

Error – new_dispred() failed with ‘instrument access failed’

in the log  :

”

displaycal 3.8.9.3 2019-12-14T12:16:22.165507Z
centos 7.7.1908 Core x86_64
Python 2.7.5 (default, Aug 7 2019, 00:51:29)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]
ImportError: No module named faulthandler
wxPython 4.0.7.post2 gtk3 (phoenix) wxWidgets 3.0.5
Encoding: UTF-8

DisplayCAL: Starting interaction with subprocess
Setting up the instrument
usb_open_port: open ‘/dev/bus/usb/003/004’ config 1 failed (-1) (Permissions ?)
usb_open_port: open ‘/dev/bus/usb/003/004’ config 1 failed (-1) (Permissions ?)
dispcal: Error – new_disprd() failed with ‘Instrument Access Failed’

DisplayCAL: Reached EOF (OK)
dispcal exitcode: 1
…aborted.
DisplayCAL: Uninhibited org.gnome.SessionManager”

I’m using a spyderX elite running on centos 7 with a quadro K6000.

Looks like a python module doesn’t exist on this Linux distrib.

Someone knows this issue?

Thanks

SpyderX Pro on Amazon  
Disclosure: As an Amazon Associate I earn from qualifying purchases.

[Florian Höch]

Hi,

first, I would very strongly recommend against running any program as root that does not require it. DisplayCAL does not.

Second, you are likely missing udev rules for your instrument. Make sure you have the latest version of ArgyllCMS (v2.1.1 as of today), then select menu “Tools” -> “Instrument” -> “Uninstall instrument configuration” in DisplayCAL to remove any old files, then “Install instrument configuration”. After this is done, it may be necessary to unplug and replug your instrument.

[drumzoo]

Hi Florian,

Thanks for your fast answer.

Yes looks llike I miss the udev rules. Do you know where I can find/setup them?

Otherwise, I followed your recommendation and everything is up to date.  The log still return>> “‘Instrument Access Failed'”.  Not sure how to managed this step

Thanks again

[drumzoo]

19:54:14,905 DisplayCAL: Starting interaction with subprocess
19:54:15,718 Setting up the instrument
19:54:15,728 usb_open_port: open ‘/dev/bus/usb/003/007’ config 1 failed (-1) (Permissions ?)
19:54:15,732 usb_open_port: open ‘/dev/bus/usb/003/007’ config 1 failed (-1) (Permissions ?)
19:54:15,733 dispcal: Error – new_disprd() failed with ‘Instrument Access Failed’

Not sure about the pass it’s trying to access…

[Florian Höch]

Yes looks llike I miss the udev rules. Do you know where I can find/setup them?

Menu “Tools”, like I said.

[drumzoo]

Yes, I forgot to montion I did use the ‘Tools’ function. I retry few time and same error occurs.

[Florian Höch]

You probably need to ask on a CentOS specific forum how their udev configuration works.

[Author]

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