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Old 26 December 2011, 23:23   #2
thomas
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Join Date: Jan 2002
Location: Germany
Posts: 5,526
IPrefs just loads and applies your saved preferences. If IPrefs causes a problem, it's not IPrefs' fault but you saved some preferences which don't match your hardware.

First check Devs/Monitors directory. Leave only those drivers in there which your monitor can display and move everything else to Storage/Monitors. For example if you have a PAL or NTSC monitor only leave PAL or NTSC in Devs/Monitors and remove everything else.

Next check Prefs/IControl and disable mode promotion.

If all of the above does not help, you can delete all saved preferences and start from scratch. Open a Shell window and enter

delete envarc:sys/#?.prefs

Then reboot.
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