Why is MATLAB Editor slow to respond in MATLAB 7.8 (R2009a) on a Linux (Ubuntu 8.10) System?

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MathWorks Support Team
编辑： MathWorks Support Team 2021-3-22
The MATLAB Editor is slow during typing and scrolling for files of length on the order of hundreds of lines. Extremely short files (just a few lines) do not have this problem. The characters of the file open in the MATLAB Editor get mangled when I use the scrollbar.
The MATLAB Command Window is also slow when typing and scrolling.

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MathWorks Support Team
编辑：MathWorks Support Team 2021-3-22
When scrolling in the MATLAB Desktop (e.g., in the Editor or Command Window), the graphics and characters become garbled with painting errors.
This is due to a misconfiguration of the X server with respect to the graphics card. A workaround is to include the attached java.opts file in your MATLAB startup directory.
The Java.opts file must contain the following tag:
-Dsun.java2d.pmoffscreen=false

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