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by simon
Thu Jul 25, 2013 8:21 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

Try adjusting aspect ratio here: http://wiki.xbmc.org/index.php?title=Settings/System#Video_calibration... Thanks, but this was one of the first things I tried. The xbmc video calibration didn't allow me to even come close to displaying a square. It is set to the best I could achieve which is a rec...
by simon
Thu Jul 25, 2013 6:59 am
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

I'm confused. What are you running when you ran this command? I'd expect something like: pi@raspberrypi:~ $ fbset -s mode "1872x1056" geometry 1872 1056 1872 1056 16 timings 0 0 0 0 0 0 0 rgba 5/11,6/5,5/0,0/16 endmode when using the console framebuffer (e.g. command line or X). Are you running som...
by simon
Wed Jul 24, 2013 8:56 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

I'm confused. What are you running when you ran this command? I'd expect something like: pi@raspberrypi:~ $ fbset -s mode "1872x1056" geometry 1872 1056 1872 1056 16 timings 0 0 0 0 0 0 0 rgba 5/11,6/5,5/0,0/16 endmode when using the console framebuffer (e.g. command line or X). Are you running som...
by simon
Wed Jul 24, 2013 9:30 am
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

I use aspect_ratio=7 as that is the closest to 24/9 I just noticed aspect_ratio=8 is actually nearer to my requirements :oops: . I will try this. Simon Makes no difference with this setting. tvservice reports unknown AR. pi@raspbmc:/boot$ tvservice -s state 0x120016 [DVI RGB full unknown AR], 1280x...
by simon
Wed Jul 24, 2013 8:52 am
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

simon wrote:I use aspect_ratio=7 as that is the closest to 24/9
I just noticed aspect_ratio=8 is actually nearer to my requirements :oops: . I will try this.
Simon
by simon
Wed Jul 24, 2013 8:43 am
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

Hi, Responses below. I don't think this is a HDMI issue. It's probably a software issue in determining the framebuffer size/scaling. We are generating a framebuffer with the required number of pixels, and I assume they are filling the screen. Yes, the screen is being filled. Is the problem that circ...
by simon
Fri Jul 19, 2013 11:53 am
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

Wouldn't it be possible to go out of spec so long as a custom driver circuit for the display is made and doesn't exceed the allowed bandwidth? The RPi is able to generate the the correct vsync, hsync, pixel clock etc. So yes electrically it can cope. Dom says that HDMI does not support the 24/9 asp...
by simon
Fri Jul 19, 2013 11:48 am
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

Anyone know if its possible to set a 24/9 aspect ratio? The aspect ratio parameter is used for the AVI InfoFrame (an out of band signalling packet transmitted separately to the pixel data). The options we support are the only options the HDMI spec allows. There is no way of signalling 24:9 over HDM...
by simon
Mon Jul 15, 2013 8:35 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

Anyone know if its possible to set a 24/9 aspect ratio?
Thanks
Simon
by simon
Thu Jul 11, 2013 5:40 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Create Custom HDMI modes
Replies: 177
Views: 205584

Re: Custom HDMI modes

Hello, First time posting on the forum but been getting lots of useful information from it for a few months now! I use: hdmi_timing=<h_active_pixels <h_sync_polarity <h_front_porch> <h_sync_pulse>h_back_porch> <v_active_lines> <v_sync_polarity> <v_front_porch> <v_sync_pulse> <v_back_porch> <v_sync_o...

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