Date: Wed, 22 Jun 2022 03:28:20 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 264267] UEFI Booting on Azure Generation 2 VMs crashes Message-ID: <bug-264267-27103-0lzk0N5wlY@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-264267-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-264267-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264267 --- Comment #29 from Wei Hu <weh@microsoft.com> --- We have narrowed down the problem area to serial console output in FreeBSD = and Azure COM emulator. Seems these two don't work very well at the early boot time. Maybe some synchronizing event was missing which causes the hang. The interesting part is, if the boot passes certain stage, the serial console w= orks 100% fine.=20 So, the temporary workaround is to suppress all printf's from the beginning= of boot up until: SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); We are working on checking the state of COM emulator in Azure to understand= the cause. --=20 You are receiving this mail because: You are the assignee for the bug.=
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