Hi Vladimir, perhaps an permission problem? Can you mail the output of following commands please: ls -lsa `dispcal -h 2>&1 | grep " 1 = " | tail -1 | awk -F\' '{print $2 }'` groups Regards Udo On 16.02.2014 14:58, Vladimir Gajic wrote: > Hello list, > > recently I moved from Mac/PC on Ubuntu. Currently trying to calibrate > my display using Argyll 1.6.3 and dispcalGUI (latest version > available). Since a Spectrolino should be used, traying to connect via > a Keyspan USA-28Xb PDA. The device is recognized automatically by the > system. DispcalGUI detects a device at dev/ttyUSB0. > > After triggering my measurement I get the following message: > > > Setting up the instrument > dispcal: Error - new_disprd() failed with 'Instrument Access Failed' > > > Here is also the complete command line: > > > Command line: > dispcal > -v2 > -d1 > -c1 > -yc > "-P0.5,0.5,1.49868073879" > -qm > -t5000 > -b130.0 > -gl > -f1.0 > -k1.0 > "SyncMaster 2014-02-16 130cdm² D5000 neutral L M-S LabLUT" > > Setting up the instrument > dispcal: Error - new_disprd() failed with 'Instrument Access Failed' > > > Any hints? > > > Thanks' in advance > > Vladimir > >