Hello all, <br><br>many thanks for your answer.<br><br>Modify the X server is a good idea.<br>I'd just tried to understand the exact place to make changes. Adding many "printf" to understand it.<br>But it's very complex.<br><br>>We modified the X Server and swapped when transferring from the shadow<br>>buffer to the video buffer. That cured all our problems. <br><br>Could you tell me where is the exact place to do this? in some files like fbdev.c or other?<br><br>>This was on the 2.4.25 from DENX and with Xfree86.<br><br>Sorry but i don't understand this sentence.<br><br>Anyway many thanks.<BR><BR><p> 
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