[meta-freescale] Freescale i.MX6 SabreSD vs 1024x768 over HDMI

[David Chirgwin]

Hi Zoltan,

----- Original Message -----
> From: zboszor at pr.hu
> To: meta-freescale at yoctoproject.org
> Sent: Tuesday, 22 July, 2014 3:57:56 PM
> Subject: [meta-freescale] Freescale i.MX6 SabreSD vs 1024x768 over HDMI
> 
> Hi,
> 
> how can I set 1024x768 for a HDMI-connected monitor for the board in
> $SUBJECT?
> Originally, I had this:
> 
> setenv video mxcfb0:dev=hdmi,1920x1080M at 60,if=RGB24,bpp=32
> setenv mmcargs 'setenv bootargs console=${console},${baudrate}
> root=${mmcroot} video=${video} consoleblank=0
> vt.global_cursor_default=0'
> 
> and all was well, fullHD is the native resolution of the monitor.
> 
> However, if I change the "setenv video ..." line like:
> 
> setenv video mxcfb0:dev=hdmi,1024x768M at 60,if=RGB24,bpp=32
> or
> setenv video mxcfb0:dev=hdmi,1024x768 at 60,if=RGB24,bpp=32
> or
> setenv video mxcfb0:dev=hdmi,1024x768,if=RGB24,bpp=32
> or
> setenv video mxcfb0:dev=hdmi,1024x768,bpp=32
> 
> then I get a 640x480 resolution. What is the proper incantation to
> set
> 1024x768?
> 
You need to make sure your monitor will support 1024x768 - not all monitors do. I had a similar issue with my monitor reverting to 640x480 because it didn't support the mode I had set.
Try this from Linux command line:

cat /sys/class/graphics/fb0/modes

Dave C

> Thanks in advance,
> Zoltán Böszörményi
> 
> 
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