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- Introduction:
- SM750 of Silicon MOtion is pci express display controller device.
- The SM750 embedded graphics features include:
- - dual display
- - 2D acceleration
- - 16MB integrated video memory
- About the kernel module parameter of driver:
- Use 1280,8bpp index color and 60 hz mode:
- insmod ./sm750fb.ko g_option="1280x1024-8@60"
- Disable MTRR,Disable 2d acceleration,Disable hardware cursor,
- and use a 800x600 mode :
- insmod ./sm750fb.ko g_option="noaccel:nomtrr:nohwc:800x600"
- dual frame buffer for driver with "dual" parameter
- insmod ./sm750fb.ko g_option="dual,800x600:1024x768"
- it will create fb0 and fb1 (or fb1,fb2 if fb0 already exist) under /dev
- and user can use con2fb to link fbX and ttyX
- Notes:
- 1) if you build the driver with built-in method, the parameter
- you edited in the grub config file will be also the
- same format as above modular method,but additionally add
- "video=sm750fb:"
- ahead of parameters,so,it looks like:
- video=sm750fb:noaccel,1280x1024@60,otherparam,etc...
- it equal to modular method with below command:
- insmod ./sm750fb.ko g_option="noaccel:1280x1024@60:otherparm:etc..."
- 2) if you put 800x600 into the parameter without bpp and
- refresh rate, kernel driver will defaulty use 16bpp and 60hz
- Important:
- if you have vesafb enabled in your config then /dev/fb0 will be created by vesafb
- and this driver will use fb1, fb2. In that case, you need to configure your X-server
- to use fb1. Another simple althernative is to disable vesafb from your config.
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