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Re: kern/55667 (regression: XEN3_DOM0 fails to boot on)

The following reply was made to PR kern/55667; it has been noted by GNATS.

From: Frank Kardel <>
Subject: Re: kern/55667 (regression: XEN3_DOM0 fails to boot on)
Date: Mon, 23 May 2022 15:01:02 +0200

 The cause for the black screen console seems to be that vga* ist 
 notconfigured any more in XEN3_DOM0
 #vga*           at pci? dev ? function ?# Needs acpi_md_vbios_reset
                                          # in acpi_wakeup.c (!xenpv)
 #genfb*         at pci? dev ? function ?# Needs acpi_md_vesa_modenum
                                          # in acpi_wakeup.c (!xenpv)
 in 9.99.55 vga* still attaches to the ASPEED VGA/BMC/IPMI chip.
 vga0 at pci42 dev 0 function 0: vendor 1a03 product 2000 (rev. 0x41)
 wsdisplay0 at vga0 kbdmux 1: console (80x25, vt100 emulation)
 in 9.99.95 the ASPEED2500 chip is not configured any more.
 ASPEED Technology ASPEED Graphics Family (VGA display, revision 0x41) at 
 pci42 dev 0 function 0 not configured
 As ASPEED devices are common in larger servers (BMC/IPMI support) 
 dropping vga support seems counterproductive and a functional regression.
 On 05/23/22 10:37, Frank Kardel wrote:
 > OK, I got some test results:
 >     1) console=pc get a black screen after xen boot output when the 
 > kernel starts - regression probably to new drm code

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