On 06/07/2024 00.46, Anton Shepelev wrote:
Thomas Huth:
I had a quick look, but if I got this right, 1366x768 is
not a mode that fits into the standard EDID information,
since 1366 is not dividable by 8.
Thank you very much Thomas. That also explains why get-
edid(1) does not work on this laptop.
See also
https://en.wikipedia.org/wiki/Extended_Display_Identification_Data#Limitations
for some more information.
It says:
For 1366x768 pixel Wide XGA panels the nearest resolution
expressible in the EDID standard timing descriptor syntax
is 1360x765 pixels, typically leading to 3 pixel thin
black bars.
I can live with 3-pixel black bars, if QEMU will only enter
a corresponding full-screen mode. What I cannot live with,
is a scaled image with intepolative blur or other artefacts.
QEMU already enables 1360x768 in the EDID information, see:
https://gitlab.com/qemu-project/qemu/-/blob/master/hw/display/edid-generate.c#L18
... but I've got no clue why guests don't offer that screen resolution ... I
still assume this resolution is something special that the driver in the
guest has to support explicitly.
Thomas
