[openchrome-devel] [Bug 106392] blank screen on OpenChrome with VIA VE900

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106392

--- Comment #59 from Kevin Brace <kevinbrace at gmx.com> ---
Regarding the top getting chopped off, is there a setting that allows you to
adjust the aspect ratio of the picture being displayed?
I know that I have had this issue when I displayed the HDMI signal coming out
of VX900 chipset with one 720p HDTV.
Unfortunately, this TV can change the display aspect ratio via a setup screen
that can only be reached by entering it from the remote control.
It was an abandoned TV (and 100% working) and the previous owner did not leave
the remote control with the TV.


(In reply to ptouchman from comment #51)
> Hi Kevin,
> 
> That sounds awesome!  I will have to try it soon.  I'm going out of town for
> a few days so I'll give it a spin on my return.
> 
> I did manage to install Ubuntu 18.04 64 bit and it seems to work well on the
> VE900 with a 1920x1080 TV acting as a monitor.
> 
> I managed to get mame running with "sudo apt install mame" and was playing
> about with pacman.
> 
> It's a bit slow at 1920x1080 resolution, so we can speed it up a bit if we
> go to 800x600 or 640x480 resolution.
> 
> mame pacman -autoframeskip -resolution 640x480 -switchres -sdlvideofps
> -video opengl
> 
> will give me around 30 frames per second.  Interestingly, at 640x480 the
> "-video soft" gives about the same performance as "-video opengl".
> 
> 
> For some reason the very top gets chopped off by the TV when I run mame from
> 1920x1080 mode and put it into 640x480 with the -switchres and -resolution
> 640x480 options.  I activate the mame frameskip display with F11 and it
> can't be seen.
> 
> When I run it from 800x600 mode by doing a "xrandr --output VGA-1 --mode
> 800x600" first the TV will display the mame screen properly.

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