Hi Team,
Good day, we received inquiry from customer that they having a problem connecting the WDST-3P-PRO6500. For me to not miss any information, Ill copy the query below.
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I'm having errors while trying to connect the DLP6500 projector to my computer through Matlab using "psychtoolbox". Both of these are open source software.
Below is the error.
PTB-ERROR: Screen(‘Flip’); beamposition timestamping computed an impossible stimulus onset value of 431633.456681 secs, which would indicate that
PTB-ERROR: stimulus onset happened before it was actually requested! (Earliest theoretically possible 431633.467674 secs).
PTB-ERROR: Some more diagnostic values (only for experts): rawTimestamp = 431633.470479, scanline = 866
PTB-ERROR: Some more diagnostic values (only for experts): line_pre_swaprequest = 683, line_post_swaprequest = 701, time_post_swaprequest = 431633.467948
PTB-ERROR: Some more diagnostic values (only for experts): preflip_vblcount = 0, preflip_vbltimestamp = 431633.456801
PTB-ERROR: Some more diagnostic values (only for experts): postflip_vblcount = 0, postflip_vbltimestamp = -1.000000, vbltimestampquery_retrycount = 0
PTB-ERROR: This error can be due to either of the following causes:
PTB-ERROR: Very unlikely: Something is broken in your systems beamposition timestamping. I’ve disabled high precision
PTB-ERROR: timestamping for now. Returned timestamps will be less robust and accurate.
PTB-ERROR: The most likely cause would be that Synchronization of stimulus onset (buffer swap) to the
PTB-ERROR: vertical blank interval VBL is not working properly, or swap completion signalling to PTB is broken.
PTB-ERROR: Please run the script PerceptualVBLSyncTest to check this. With non-working sync to VBL, all stimulus timing
PTB-ERROR: is futile. Also run OSXCompositorIdiocyTest on macOS. Also read ‘help SyncTrouble’ !
PTB-INFO: Enforcing script abortion and restoring desktop by executing Screen(‘CloseAll’) now!
PTB-INFO: Please ignore the false error message (INTERNAL PSYCHTOOLBOX ERROR) caused by this…
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Thank you and looking forward for your kind response.
Regards,
Maynard
