AB350M Pro4@4.70 + Server 2016 + HyperV=Bootloop

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   Hi,
since I've been upgrading all my Ryzen 1700@AB350M Pro4 machines, it is not possible to run Server 2016 (at any Version or Update-level) with the installed Hyper-V role. Every time I do so, the system won't boot an hangs during its process.
The only solution that works is to downgrade the BIOS to Version 3.40 or below, which can't be the solution after all.
I checked if this problem occurs with Windows 10 (with Hyper-V-Feature), but surprisingly that works fine. Hence I suspect, there must be something wrong with the BIOS >3.40.

Can anybody confirm this? Has anybody a fix for it? I wanted to upgrade all my old systems (>80) to Ryzen @AB350M Pro4 or a possible AB450M Pro4, but would now hesitate due to this bug.

Thanks!

BTW: Server 2008R2@Hyper-V works regardless the BIOS version. 

Edited by Sightus - 04 Apr 2018 at 8:48pm

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Sightus Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 Apr 2018 Status: Offline Points: 5	Post Options Post Reply Quote Sightus Report Post Thanks(0) Quote Reply Topic: AB350M Pro4@4.70 + Server 2016 + HyperV=Bootloop Posted: 03 Apr 2018 at 10:14pm
	Hi, since I've been upgrading all my Ryzen 1700@AB350M Pro4 machines, it is not possible to run Server 2016 (at any Version or Update-level) with the installed Hyper-V role. Every time I do so, the system won't boot an hangs during its process. The only solution that works is to downgrade the BIOS to Version 3.40 or below, which can't be the solution after all. I checked if this problem occurs with Windows 10 (with Hyper-V-Feature), but surprisingly that works fine. Hence I suspect, there must be something wrong with the BIOS >3.40. Can anybody confirm this? Has anybody a fix for it? I wanted to upgrade all my old systems (>80) to Ryzen @AB350M Pro4 or a possible AB450M Pro4, but would now hesitate due to this bug. Thanks! BTW: Server 2008R2@Hyper-V works regardless the BIOS version. Edited by Sightus - 04 Apr 2018 at 8:48pm

Sightus Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 Apr 2018 Status: Offline Points: 5	Post Options Post Reply Quote Sightus Report Post Thanks(0) Quote Reply Posted: 13 Apr 2018 at 9:00pm
	Nobody? Is there a way to contact AsRock about it?

Sightus Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 Apr 2018 Status: Offline Points: 5	Post Options Post Reply Quote Sightus Report Post Thanks(0) Quote Reply Posted: 25 Apr 2018 at 3:58am
	I'll continue to write to myself; seems this problem ist related to the combination of the Ryzen 2xxx-Support-BIOS and an installed Ryzen 1xxx. Today I switched my Ryzen 7 1700(x) with a brand new Ryzen 7 2700X and Server 2016 with the activated Hyper-V-role is booting without a problem. So: a) If you need Hyper-V@Server 2016 with an Ryzen 1xxx ==> use the BIOS 3.40 or below. b) If you want the same but you are running a Ryzen 2xxx ==> use the BIOS 3.70 or above.

ninjacat Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Feb 2019 Status: Offline Points: 1	Post Options Post Reply Quote ninjacat Report Post Thanks(0) Quote Reply Posted: 16 Feb 2019 at 7:50pm
	Thank you for your information. I user Ryzen 1600 to run windows server 2019. After downgrade bios to 3.40. I can boot OS and use hyperV.

xhue Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 17 Aug 2018 Status: Offline Points: 634	Post Options Post Reply Quote xhue Report Post Thanks(0) Quote Reply Posted: 16 Feb 2019 at 10:38pm
	Yes, thank you, indeed! This type of information is really scarce, so your 'mini blog' will save some poor soul a lot of time. Unfortunately, that's how ASRock BIOS team is...