BIOS boot / wrong monitor
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=12954
Printed Date: 26 Apr 2024 at 9:32pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: BIOS boot / wrong monitor
Posted By: Tentaurus
Subject: BIOS boot / wrong monitor
Date Posted: 23 Nov 2019 at 6:55pm
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one VGA and one DVI monitor. BIOS boots always with the VGA monitor. How can I change this? THX! |
Replies:
Posted By: Ray62
Date Posted: 23 Nov 2019 at 7:10pm
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Without infos to your system no one can help you. So there is only one answer: Disconnect the VGA monitor. Ok, a second: Set the bios to UEFI mode, meaning disable CSM. ------------- Asrock Fatal1ty X370 Professional Gaming Offline Under test: MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE |
Posted By: Tentaurus
Date Posted: 23 Nov 2019 at 7:19pm
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it's a B450M Pro4-F I disconnected the VGA. Of course BIOS is booted in the remaining DVI monitor... Connected the VGA again, BIOS is booting in the VGA! Is it even possible to change this? |
Posted By: Ray62
Date Posted: 23 Nov 2019 at 7:30pm
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Which GPU are you using? Or do you have an APU using the onboard connectors? ------------- Asrock Fatal1ty X370 Professional Gaming Offline Under test: MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE |
Posted By: Tentaurus
Date Posted: 23 Nov 2019 at 7:49pm
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APU. Ryzen 5 3400g |
Posted By: Ray62
Date Posted: 23 Nov 2019 at 8:10pm
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Look in the bios if you can find an entry for selecting the default display output. Or as i already posted: Set the bios to UEFI mode, meaning disable CSM. ------------- Asrock Fatal1ty X370 Professional Gaming Offline Under test: MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE |
Posted By: gizmic
Date Posted: 25 Nov 2019 at 11:35am
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legacy mode prioritize vga>dvi>hdmi>dp uefi mode is the opposite ------------- 
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Posted By: Tentaurus
Date Posted: 30 Nov 2019 at 8:28pm
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I do a boot in UEFI Mode! But there's no option to change the primary video device?! |
Posted By: gizmic
Date Posted: 30 Nov 2019 at 11:09pm
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are you sure you have csm disabled -------------
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Posted By: Tentaurus
Date Posted: 01 Dec 2019 at 6:43pm
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OK, in the meantime I got it how to enable / disable CSM! But CSM is disabled. I use UEFI! But Bios is booting always with VGA! There's no setting to change the primary display port!? |
Posted By: CosminPerRam
Date Posted: 01 Dec 2019 at 8:18pm
| I was curios of the same thing and i just disabled CSM and my system now uses the hdmi monitor over the vga one (B450M Steel Legend with Ryzen 5 3600). |
Posted By: gizmic
Date Posted: 01 Dec 2019 at 11:01pm
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disbled csm will never boot vga first and was proven by CosminPerRam -------------
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Posted By: atwk
Date Posted: 04 Sep 2020 at 5:14pm
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So I disabled CSM and it still boots VGA instead of HDMI. I have an Asrock A300 with Ryzen 5 3400G |