Solution - Acer ARMC_2 User Manual

Screen Distortion,
Symptom, Continued
When the analog signal is set lower than 1024x768 (for example: 800x600), the ARMC/2
card's video controller will use ratio metric expansion to bring the screen to 1024x768.
Because of this, the screen will become blurry.

Solution

To correct this, set the screen resolution on the host system to 1024x768.
Continued
Appendix D : Troubleshooting 133