built in video problems on mac iisi dear mac friends i ve seen the following problem om three mac iisi machines all with mb ram installed or ns simms if the contents of a window are being calculated and updated a lot of strange horizontal lines are temporarily generated on the screen the lines translate to the top of the screen and have a slightly lower brightness than their surroundings they are a few millimeters apart i admit that they are vague but they can still be distinguished clearly especially if the environment i e the rest of the room is a bit dark applications which produce this effect are the previewer of directtex i e dvireader kaleidagraph fpu the machines use their built in video and drive the old apple hires monochrome screen two monitors cable sets tried the effect is independent of the settings in the following control panels memory adressing mode disk cache and monitors nr of greys colors have you ever seen this effect too is there a solution thanks fred fred walsteijn internet walsteyn fys ruu nl institute for marine and atmospheric research fax utrecht university the netherlands phone
