B550 Pro4 Low Resolution in BIOS/WinPE

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   When booting up a WinPE based "rescue.iso" for imaging software like Macrium Reflect, Hasleo Backup Suite, etc. I get a very low (unusable in some cases, the app won't even fit in the screen) resolution of 800x600 I think it is. I think it is 1024x768 in the actual BIOS/UEFI, and I can tell GRUB to do 1080 and it will, but it defaults to something really low.

When installing Windows itself, the resolution is at 800x600 and greyed out, until I get the GPU drivers installed, making it almost impossible to navigate the setup. 800x600 is below the minimum most apps are designed for these days and the "Next" or "OK" buttons and other required dialogs are totally off screen.

I've had this problem on three different 1080p monitors, and four different GPUs, 2 Nvidia 10 and 16 series, and 2 AMD 6000 series RDNA2. One BIOS version, v2.10 from 2021 worked properly, but all since then have the problem. I can not go back to 2.10 because I have a Ryzen 7 5800XT CPU that requires v3.41 or newer.

When I ran with CSM = enabled and used legacy BIOS and MBR disks, it worked better (don't remember if it was full 1080p or just higher than 800x600), but running UEFI and GPT disks with CSM = disabled as it must be to use Resizable BAR, I have issues.

Any ideas? Setting that "Full HD" (or similar, from memory) option in the BIOS to Auto or Disabled makes no difference. I could run Legacy/CSM/MBR but I'd lose a lot of modern features and performance.

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Quexos Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 30 Apr 2021 Status: Offline Points: 320	Post Options Post Reply Quote Quexos Report Post Thanks(0) Quote Reply Topic: B550 Pro4 Low Resolution in BIOS/WinPE Posted: 3 hours 57 minutes ago at 12:42am
	When booting up a WinPE based "rescue.iso" for imaging software like Macrium Reflect, Hasleo Backup Suite, etc. I get a very low (unusable in some cases, the app won't even fit in the screen) resolution of 800x600 I think it is. I think it is 1024x768 in the actual BIOS/UEFI, and I can tell GRUB to do 1080 and it will, but it defaults to something really low. When installing Windows itself, the resolution is at 800x600 and greyed out, until I get the GPU drivers installed, making it almost impossible to navigate the setup. 800x600 is below the minimum most apps are designed for these days and the "Next" or "OK" buttons and other required dialogs are totally off screen. I've had this problem on three different 1080p monitors, and four different GPUs, 2 Nvidia 10 and 16 series, and 2 AMD 6000 series RDNA2. One BIOS version, v2.10 from 2021 worked properly, but all since then have the problem. I can not go back to 2.10 because I have a Ryzen 7 5800XT CPU that requires v3.41 or newer. When I ran with CSM = enabled and used legacy BIOS and MBR disks, it worked better (don't remember if it was full 1080p or just higher than 800x600), but running UEFI and GPT disks with CSM = disabled as it must be to use Resizable BAR, I have issues. Any ideas? Setting that "Full HD" (or similar, from memory) option in the BIOS to Auto or Disabled makes no difference. I could run Legacy/CSM/MBR but I'd lose a lot of modern features and performance.

Quexos Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 30 Apr 2021 Status: Offline Points: 320	Post Options Post Reply Quote Quexos Report Post Thanks(0) Quote Reply Posted: 3 hours 39 minutes ago at 1:00am
	No edit function? Anyway, I know BIOS 2.10 worked from when I had a Ryzen 5 5600 CPU in this main board, but am afraid to try it with a 5800XT that didn't even exist when that BIOS was released. Also, if my memory serves me, my Asrock B450 Gaming K4 had the exact same problem, only I always ran it in Legacy BIOS mode so just didn't care.