Iiyama ProLite B2409 at 2048x1152

I have an Iiyama B2409 monitor with a native resolution of 1920×1080. I also have a Dell 2309 at work, which has a native resolution of 2048×1152. Using Chris Grandsen’s MDF definition from here, I have this running at native resolution. I transferred the SD Card to my other Panda, connected to the Iiyama without remembering to change the resolution to 1920×1080 and turned it on only to discover that it worked! I didn’t expect that – I expected a standard “not supported” message, but instead I got a 2048×1152 screen resolution. And very clear it is too!

Can anyone else, with the same hardware, replicate this? Opens up an additional monitor to those wanting to go bigger than Full HD. I have to say, I’ve tried it on two B2409s and it works on both.

And I think I’ve got a golden Panda! No screen tearing at 1920×1080 or 2048×1152 in 16m colours using images that normally produce the effect! Whoo!

Interesting.
What resolution does the monitor report it is receiving?

Maybe Panda works in the same way as RPi? By “the same way” I mean that you can set any resolution in the OS, but it will be scaled down by GPU to resolution set in some kind of config file.

What resolution does the monitor report it is receiving?

It doesn’t report anything on screen, but if I VNC into the Panda, Avalanche reports the screen resolution as 2048×1152. which is unsurprising, because that’s what the Panda is doing!

I can visibly see that it is different to 1920×1080 in a way that I would expect 2048×1152 to do, and it’s just about as clear with outline fonts as 1920×1080. It will also do 1920×1200, but obviously stretches/squashes icons, so the Netsurf blue ball becomes slightly oval, for example.

When I tried it on a PC, it will only push the monitor as far as 1920×1080 – I don’t have a 2048 choice. I guess the EDID on the monitor is getting in the way.

Okay, now I’ve found the menu on the monitor itself and it reports at 2048×1152, 58Khz horizontal frequency and 49Hz vertical frequency.

I can’t replicate the mode on a PC, even though the nvidia Control Panel will allow me to create “out of spec” definitions. Does anyone know how to translate a RISC OS screen mode to PC?!