Hi,
I have a dual monitor setup using a notebook. The second monitor (Dell
U2415) is plugged to the HDMI port of my notebook. Both are calibrated and
correctly configured using colord. When I run darktable-cmtest, everything
seems to be fine:
darktable-cmstest version 2.0~rc2+29~g8c1da7b
this executable was built with colord support enabled
darktable itself was built without colord support

eDP1    the X atom and colord returned the same profile
    X atom:    _ICC_PROFILE (1125424 bytes)
        description:
AVELLVCM8X-N156HG_Mode-RX-GX-BX-BRX-COX-GX_2015-11-15_gamma2.2_D6500_XYZLUT+MTX_6509_tests_Auto-optimized
    colord:
"/home/csouza/.local/share/icc/AVELLVCM8X-N156HG_Mode-RX-GX-BX-BRX-COX-GX_2015-11-15_gamma2.2_D6500_XYZLUT+MTX_6509_tests_Auto-optimized.icc"
        description:
AVELLVCM8X-N156HG_Mode-RX-GX-BX-BRX-COX-GX_2015-11-15_gamma2.2_D6500_XYZLUT+MTX_6509_tests_Auto-optimized

HDMI1    the X atom and colord returned the same profile
    X atom:    _ICC_PROFILE_1 (1056224 bytes)
        description:
DELLU2415_Mode-R99-G97-B98-BR57-CO60-GPC_2015-11-14_gamma2.2_D6500_XYZLUT+MTX_5336_tests_Auto-optimized
    colord:
"/var/lib/colord/icc/DELLU2415_Mode-R99-G97-B98-BR57-CO60-GPC_2015-11-14_gamma2.2_D6500_XYZLUT+MTX_5336_tests_Auto-optimized.icc"
        description:
DELLU2415_Mode-R99-G97-B98-BR57-CO60-GPC_2015-11-14_gamma2.2_D6500_XYZLUT+MTX_5336_tests_Auto-optimized

Your system seems to be correctly configured

But when I run darktable, the profiles are swapped! If darktable's window
is shown in the Dell monitor, it uses the notebook color profile. When it
is in the notebook screen, it uses the Dell profile (I ran "darktable -d
all" to track it). If I invert the monitors position in the system
configuration, darktable is able to get the correct profiles, but it's very
weird to work with this configuration. This problem doesn't occurs in
version 1.6.9, only in the development version. I am currently using
darktable version 2.0~rc2+29~g8c1da7b from the unstable ppa under Ubuntu
15.10 64 bits. If you already know about this bug, please disconsider this
message.

Cheers
--
Caio S. Souza
Laboratório de Biologia Teórica e Computacional
Universidade de Brasília
www.lbtc.unb.br

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