[Bug 96453] Screen shows only upper left detail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96453

--- Comment #7 from Sebastian Gutzwiller <sebastian.gutzwiller at gmx.net> ---
(In reply to Chris Wilson from comment #4)
> The screen is only 640x480 but we define a 1024x768 framebuffer since there
> is no EDID for the panel. 

I tried to give an appropriate EDID of the 'AUO 5.7" VGA (640x480) Colour TFT'
to the DRM as suggested by
https://wiki.archlinux.org/index.php/kernel_mode_setting#Forcing_modes_and_EDID 
I am verifying that EDID with the manufacturer.
During trials with that EDID I saw in the XOrg log that the default DPI of 96 x
96 also led to the wrong physical screen size.
Is giving the EDID to the DRM an option?

> Not sure if there is anything we can do without
> user invention since the hardware is not providing a description, so the
> best approach would appear to be video=VGA-1:640x480

I made two trials without success, see attached pictures. Shall I attach a log?

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