Question [Solved] Weird BIOS Freeze if I reset CMOS without an HDMI port rant

ZGR

Platinum Member
Oct 26, 2012
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585
136
Had a really annoying issue with the MSI MAG B550 Tomahawk for the past hour or so. Each time I tried to enter BIOS, it would instantly freeze. Windows was not affected. I initially thought it was due to a bad memory overclock, despite Windows being unaffected.

Resetting CMOS fixed it until after re enabling my settings (XMP profile and disable RGB); and upon entering BIOS again, it would freeze entirely. I did google the issue, and came across a few people who had same problem. One thread had a user who's BIOS froze when entering advanced (mine just instantly froze). A user suggested using an HDMI cable.

Fix was hooking up an old monitor with HDMI. BIOS doesn't freeze at all with that. My main display is a 1440p144 which successfully entered BIOS several times already. I don't use HDMI at my desk. When I built this PC I did use a 720p TV in the living room to verify it could POST, but that was only other time I used an HDMI port. Makes me wonder if I used a displayport cable I would have encountered a frozen BIOS immediately on building the PC.

So here's the funny part: I reset CMOS for fun (lol), and booted up with the displayport monitor, and enabled XMP. Rebooted, and re-entered BIOS and it is frozen. But if I enter BIOS with an HDMI monitor, I can then unplug it after reboot, and use the 1440p monitor in BIOS without issue until I need to reset CMOS again. So basically I have this weird bug that will cause my BIOS to freeze unless I enter it once with an HDMI based display.

Now that I know how to replicate the bug, I am not too worried that there is any hardware issue, but jeez what a bug. It could have something to do with the 1080 ti for all I know. Am really curious at why/how this is happening.
 
Last edited:

ZGR

Platinum Member
Oct 26, 2012
2,009
585
136
Never updated the firmware before as far as I was aware, but this card did have a previous owner. Says I already have updated firmware.
But the description on that webpage definitely sounds a lot like my issue. Probably is the culprit, awesome find!



If you are currently experiencing a blank screen or hang on boot with a DP 1.3 or 1.4 monitor, please try one of the following workarounds in order to run the tool:


  • Boot using DVI or HDMI
  • Boot using a different monitor
  • Change boot mode from UEFI to Legacy; or Legacy to UEFI.
  • Boot using an alternate graphics source (secondary or integrated graphics card)
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