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xro:beaglebone [2015-12-08 17:11] xro created |
xro:beaglebone [2015-12-09 00:21] xro |
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==== Nonstandard HMDI Resolution ==== | ==== Nonstandard HMDI Resolution ==== | ||
+ | Beaglebone X uses framebuffer device, So adding a modeline in xorg.conf won't work. | ||
+ | Likewise any fb-resolutions given on the kernelCL depend on that framebuffer-resolution already defined. | ||
+ | In the end, none of that is really needed. | ||
+ | Steps: | ||
+ | - generate a new fb config, using ''gtf <width> <height> <refreshrate> -f'' | ||
+ | - add it to ''/etc/fb.modes'' | ||
+ | - you're done, the rest happens automatically | ||
+ | |||
+ | == Example for Resolution 1440x900 == | ||
+ | |||
+ | <file txt fb.modes> | ||
+ | mode "1440x900-60" | ||
+ | # PCLK: 106.47 MHz, H: 55.92 kHz, V: 60.00 Hz | ||
+ | geometry 1440 900 1440 900 32 | ||
+ | timings 9392 232 80 28 1 152 3 | ||
+ | hsync low | ||
+ | vsync high | ||
+ | endmode | ||
+ | </file> | ||
+ | |||
+ | ==== Rotating the BeagleBone Screen / Display ==== | ||
+ | This can and should be done use X. Downside is you can't rotate the console like on the RPi. | ||
+ | Accomplish it using the ''Rotate'' X-Option of the Framebuffer Device. | ||
+ | |||
+ | <file txt xorg.conf> | ||
+ | Section "Device" | ||
+ | Identifier "Builtin Default fbdev Device 0" | ||
+ | Driver "fbdev" | ||
+ | Option "Rotate" "CCW" | ||
+ | EndSection | ||
+ | |||
+ | Section "Screen" | ||
+ | Identifier "Builtin Default fbdev Screen 0" | ||
+ | Device "Builtin Default fbdev Device 0" | ||
+ | DefaultDepth 16 | ||
+ | EndSection | ||
+ | |||
+ | Section "ServerLayout" | ||
+ | Identifier "Builtin Default Layout" | ||
+ | Screen "Builtin Default fbdev Screen 0" | ||
+ | EndSection | ||
+ | </file> | ||
==== Transient State of pins during startup ==== | ==== Transient State of pins during startup ==== |
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