Re: [Qemu-devel] Questions about EDID

[G 3 <programmingkidx@gmail.com>]

If the value is already in the list, then something else must be happening
that prevents the custom resolution from reaching the guest. Would you know
where in the list the custom resolution is added? My guess right now is the
size of the list is being reported incorrectly - the custom resolution
isn't being counted. When the operating system iterates thru the list it
might stop right before the custom resolution value, preventing its
inclusion.

On Fri, Mar 1, 2019 at 12:47 AM Gerd Hoffmann <kraxel@redhat.com> wrote:

> On Thu, Feb 28, 2019 at 11:53:43AM -0500, G 3 wrote:
> > On Thu, Feb 28, 2019 at 12:01 AM Mark Cave-Ayland <
> > mark.cave-ayland@ilande.co.uk> wrote:
> >
> > > On 27/02/2019 05:27, Gerd Hoffmann wrote:
> > >
> > > > On Tue, Feb 26, 2019 at 04:11:06PM -0500, G 3 wrote:
> > > >> When I use edid=on, I do see a lot of extra resolutions available in
> > > Mac OS
> > > >> 9 and Mac OS X, just not the resolution I want to use. Is there some
> > > kind
> > > >> of rule like the resolution value has to be divisible by a certain
> > > number?
> > > >
> > > > qemu doesn't have such a requirement.
> > > > Might be the guest drivers have.
> > > > Try making width/height multiple of 8 or 16.
> > >
> > > Right, at the moment all the MacOS driver does is parse the resolution
> > > list from the
> > > EDID and add them to the dropdown list - it doesn't support the xres
> and
> > > yres properties.
> > >
> >
> > Gerd, could the xres +yres numbers be added to the list of resolutions
> > then?
>
> That is already the case:
>
> qemu-edid -x 1234 -y 567 | edid-decode
> [ ... ]
> First detailed timing is preferred timing
> Established timings supported:
>   640x480@60Hz
>   800x600@60Hz
>   1024x768@60Hz
> Standard timings supported:
>   2048x1152@60Hz
>   1920x1080@60Hz
> Detailed mode: Clock 73.170 MHz, 485 mm x 223 mm
>                1234 1542 1579 1665 hborder 0
>                ^^^^
>                 567  569  571  586 vborder 0
>                 ^^^
>                -hsync -vsync
> [ ... ]
>
> cheers,
>   Gerd
>
>