OS2 World Community Forum

OS/2, eCS & ArcaOS - Technical => Hardware => Topic started by: Martin Vieregg on February 26, 2026, 11:56:42 pm

Title: Problem with Panorama resultion
Post by: Martin Vieregg on February 26, 2026, 11:56:42 pm
My son crashed the HDMI socket of a 2560x1440 screen. The displayport socket is still intact, but my PC does not have a displayport socket. I bought a special adaper cable with a small box (in the other direction, from Displayport to HDMI, you don't need this box, an adapter cable is sufficient) and with Windows, the computer works fine. But with OS/2 (ArcaOS 5.0.6), the computer first turns to VGA and then I can choose 1920x1200 for the next reboot and this lower resultion works. I have a second screen with an intact HDMI socket. I can boot OS/2 by using HDMI and then remove the HDMI cable and switch to the adapter cable and OS/2 shows the full resolution.

So the problem is "only" an initialization problem with Panorama. I already used:
panoutil -c 2560 1440 c:
but this had no effect.

How can I force a specific resultion (on my own risk)?
Any ideas are greatly appreciated.
Title: Re: Problem with Panorama resultion
Post by: Dave Yeo on February 27, 2026, 04:11:43 am
You might be out of luck. Panorama depends on the video bios and sometimes that video bios seems to initialize different ports differently.
Hopefully others have other ideas. I'd suggest a ticket but if you're running 5.06 you're likely out of support.
Title: Re: Problem with Panorama resultion
Post by: Neil Waldhauer on February 28, 2026, 04:21:16 pm
It may be that the PC manufacturer fixed their CSM software that provides the Video BIOS. If you can update the BIOS, it might help.