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Date:   Sat, 13 May 2017 23:32:15 +0200
From:   Valentin Vidic <>
To:     PGNet Dev <>
Cc:     Andrew Cooper <>,
        Randy Dunlap <>,
        "" <>,
        Clemens Ladisch <>,
Subject: Re: [Xen-devel] HPET enabled in BIOS, not presented as
 available_clocksource -- config, kernel code, &/or BIOS?

On Sat, May 13, 2017 at 02:06:28PM -0700, PGNet Dev wrote:
> xl dmesg | grep -i hpet   | grep -vi command
>  [    1.365876] hpet_acpi_add: no address or irqs in _CRS
>  [    1.365876] hpet_acpi_add: no address or irqs in _CRS

Ah, guess this is caused by console_to_ring boot option.

Better check you are not missing info from the Xen ring buffer.
It should start with the Xen version like this:

# xl dmesg | head
(XEN) Xen version 4.4.1 (Debian 4.4.1-9+deb8u9) ( (gcc (Debian 4.9.2-10) 4.9.2) debug=n Mon May  8 16:01:37 UTC 2017
(XEN) Bootloader: GRUB 2.02~beta2-22+deb8u1
(XEN) Command line: placeholder dom0_mem=2048M com2=115200,8n1 console=com2,vga
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 1 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 1 MBR signatures
(XEN)  Found 1 EDD information structures


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